<![CDATA[MYSTRAN Forum - Pre/Post Processors]]> https://www.mystran.com/forums/ Sun, 26 Apr 2026 15:03:07 +0000 MyBB <![CDATA[Python Neutral Parse]]> https://www.mystran.com/forums/showthread.php?tid=65 Fri, 16 Apr 2021 08:02:25 +0000 numenic]]> https://www.mystran.com/forums/showthread.php?tid=65
It's available on pypi: https://pypi.org/project/femap-neutral-parser/
repository: https://framagit.org/numenic/femap_neutral_parser/]]>
It's available on pypi: https://pypi.org/project/femap-neutral-parser/
repository: https://framagit.org/numenic/femap_neutral_parser/]]> <![CDATA[FEMAP neutral improvements]]> https://www.mystran.com/forums/showthread.php?tid=64 Fri, 09 Apr 2021 15:44:31 +0000 numenic]]> https://www.mystran.com/forums/showthread.php?tid=64
I'll begin with this a simpleCBAR + CBUSH model. The attached archive provides the following files:

* "bulk_model_TC3.nas": the BULK file
* "mystran_00.NEU": the MYSTRAN output
* "FEMAP_v8.2.neu": the FEMAP v8.2 output
* "FEMAP_v2020-1-0.neu": the FEMAP v2020.1 output

First remark: Block451 is used by both MYSTRAN and FEMAP8.2 to collect results, but is deprecated in later versions in favor of block 1051.

Block451: titles used by MYSTRAN do not match FEMAP titles. This makes harder to write "solver-agnostic" parsers. From the uploaded files, here is the list with mismatch and missing :

That's all for now! thanks for reading and happy MYSTRANning !

Code:
| FEMAP vector Title        | FEMAP vector ID | MYSTRAN vector Title     | MYSTRAN vector ID |
|---------------------------+-----------------+--------------------------+-------------------|
| Total Translation         | 1               | RSS translation          | 10001             |
| T1 Translation            | 2               | T1  translation          | 10002             |
| T2 Translation            | 3               | T2  translation          | 10003             |
| T3 Translation            | 4               | T3  translation          | 10004             |
| Total Rotation            | 5               | RSS rotation             | 10005             |
| R1 Rotation               | 6               | R1  rotation             | 10006             |
| R2 Rotation               | 7               | R2  rotation             | 10007             |
| R3 Rotation               | 8               | R3  rotation             | 10008             |
| Total Applied Force       | 41              | RSS applied force        | 20001             |
| T1 Applied Force          | 42              | T1  applied force        | 20002             |
| T2 Applied Force          | 43              | T2  applied force        | 20003             |
| T3 Applied Force          | 44              | T3  applied force        | 20004             |
| Total Applied Moment      | 45              | RSS applied moment       | 20005             |
| R1 Applied Moment         | 46              | R1  applied moment       | 20006             |
| R2 Applied Moment         | 47              | R2  applied moment       | 20007             |
| R3 Applied Moment         | 48              | R3  applied moment       | 20008             |
| Total Constraint Force    | 51              | RSS SPC force            | 30001             |
| T1 Constraint Force       | 52              | T1  SPC force            | 30002             |
| T2 Constraint Force       | 53              | T2  SPC force            | 30003             |
| T3 Constraint Force       | 54              | T3  SPC force            | 30004             |
| Total Constraint Moment   | 55              | RSS SPC moment           | 30005             |
| R1 Constraint Moment      | 56              | R1  SPC moment           | 30006             |
| R2 Constraint Moment      | 57              | R2  SPC moment           | 30007             |
| R3 Constraint Moment      | 58              | R3  SPC moment           | 30008             |
| Total MultiPoint Force    | 151             | na                       | na                |
| T1 MultiPoint Force       | 152             | na                       | na                |
| T2 MultiPoint Force       | 153             | na                       | na                |
| T3 MultiPoint Force       | 154             | na                       | na                |
| Total MultiPoint Moment   | 155             | na                       | na                |
| R1 MultiPoint Moment      | 156             | na                       | na                |
| R2 MultiPoint Moment      | 157             | na                       | na                |
| R3 MultiPoint Moment      | 158             | na                       | na                |
| Total Summed GPForce      | 161             | na                       | na                |
| T1 Summed GPForce         | 162             | na                       | na                |
| T2 Summed GPForce         | 163             | na                       | na                |
| T3 Summed GPForce         | 164             | na                       | na                |
| Total Summed GPMoment     | 165             | na                       | na                |
| R1 Summed GPMoment        | 166             | na                       | na                |
| R2 Summed GPMoment        | 167             | na                       | na                |
| R3 Summed GPMoment        | 168             | na                       | na                |
| Total Applied GPForce     | 171             | na                       | na                |
| T1 Applied GPForce        | 172             | na                       | na                |
| T2 Applied GPForce        | 173             | na                       | na                |
| T3 Applied GPForce        | 174             | na                       | na                |
| Total Applied GPMoment    | 175             | na                       | na                |
| R1 Applied GPMoment       | 176             | na                       | na                |
| R2 Applied GPMoment       | 177             | na                       | na                |
| R3 Applied GPMoment       | 178             | na                       | na                |
| Total Constraint GPForce  | 181             | na                       | na                |
| T1 Constraint GPForce     | 182             | na                       | na                |
| T2 Constraint GPForce     | 183             | na                       | na                |
| T3 Constraint GPForce     | 184             | na                       | na                |
| Total Constraint GPMoment | 185             | na                       | na                |
| R1 Constraint GPMoment    | 186             | na                       | na                |
| R2 Constraint GPMoment    | 187             | na                       | na                |
| R3 Constraint GPMoment    | 188             | na                       | na                |
| Bar EndA Plane1 Moment    | 3000            | BAR EndA Plane1 Moment   | 50201             |
| Bar EndA Plane2 Moment    | 3001            | BAR EndA Plane2 Moment   | 50203             |
| Bar EndB Plane1 Moment    | 3002            | BAR EndB Plane1 Moment   | 50202             |
| Bar EndB Plane2 Moment    | 3003            | BAR EndB Plane2 Moment   | 50204             |
| Bar EndA Pl1 Shear Force  | 3004            | BAR EndA Pl1 Shear Force | 50205             |
| Bar EndA Pl2 Shear Force  | 3005            | BAR EndA Pl2 Shear Force | 50207             |
| Bar EndA Axial Force      | 3008            | BAR EndA Axial Force     | 50209             |
| Bar EndA Torque           | 3010            | BAR EndA Torque          | 50211             |
| Bar EndA Pt1 Bend Stress  | 3075            | BAR EndA Pt1 Comb Stress | 60301             |
| Bar EndA Pt2 Bend Stress  | 3076            | BAR EndA Pt2 Comb Stress | 60303             |
| Bar EndA Pt3 Bend Stress  | 3077            | BAR EndA Pt3 Comb Stress | 60305             |
| Bar EndA Pt4 Bend Stress  | 3078            | BAR EndA Pt4 Comb Stress | 60307             |
| Bar EndB Pt1 Bend Stress  | 3083            | BAR EndB Pt1 Comb Stress | 60302             |
| Bar EndB Pt2 Bend Stress  | 3084            | BAR EndB Pt2 Comb Stress | 60304             |
| Bar EndB Pt3 Bend Stress  | 3085            | BAR EndB Pt3 Comb Stress | 60306             |
| Bar EndB Pt4 Bend Stress  | 3086            | BAR EndB Pt4 Comb Stress | 60308             |
| Bar EndA Axial Stress     | 3107            | na                       | na                |
| Bar EndA Max Comb Stress  | 3109            | BAR EndA Max Stress      | 60309             |
| Bar EndA Min Comb Stress  | 3110            | BAR EndA Min Stress      | 60311             |
| Bar EndB Max Comb Stress  | 3111            | BAR EndB Max Stress      | 60310             |
| Bar EndB Min Comb Stress  | 3112            | BAR EndB Min Stress      | 60312             |
| Bar Tension M.S.          | 3113            | na                       | na                |
| Bar Compression M.S.      | 3114            | na                       | na                |
| Bush X Force              | 3774            | na                       | na                |
| Bush Y Force              | 3775            | na                       | na                |
| Bush Z Force              | 3776            | na                       | na                |
| Bush X Moment             | 3777            | na                       | na                |
| Bush Y Moment             | 3778            | na                       | na                |
| Bush Z Moment             | 3779            | na                       | na                |
| Bush TX Stress            | 3780            | na                       | na                |
| Bush TY Stress            | 3781            | na                       | na                |
| Bush TZ Stress            | 3782            | na                       | na                |
| Bush RX Stress            | 3783            | na                       | na                |
| Bush RY Stress            | 3784            | na                       | na                |
| Bush RZ Stress            | 3785            | na                       | na                |
| Elem C1 T1 GPForce        | 85000           | na                       | na                |
| Elem C1 T2 GPForce        | 85001           | na                       | na                |
| Elem C1 T3 GPForce        | 85002           | na                       | na                |
| Elem C1 R1 GPMoment       | 85003           | na                       | na                |
| Elem C1 R2 GPMoment       | 85004           | na                       | na                |
| Elem C1 R3 GPMoment       | 85005           | na                       | na                |
| Elem C2 T1 GPForce        | 85010           | na                       | na                |
| Elem C2 T2 GPForce        | 85011           | na                       | na                |
| Elem C2 T3 GPForce        | 85012           | na                       | na                |
| Elem C2 R1 GPMoment       | 85013           | na                       | na                |
| Elem C2 R2 GPMoment       | 85014           | na                       | na                |
| Elem C2 R3 GPMoment       | 85015           | na                       | na                |
| na                        | na              | BAR EndB Pl1 Shear Force | 50206             |
| na                        | na              | BAR EndB Pl2 Shear Force | 50208             |
| na                        | na              | BAR EndB Axial Force     | 50210             |
| na                        | na              | BAR EndB Torque          | 50212             |


.zip   mystran_femap_q1.zip (Size: 17.52 KB / Downloads: 2) ]]>
I'll begin with this a simpleCBAR + CBUSH model. The attached archive provides the following files:

* "bulk_model_TC3.nas": the BULK file
* "mystran_00.NEU": the MYSTRAN output
* "FEMAP_v8.2.neu": the FEMAP v8.2 output
* "FEMAP_v2020-1-0.neu": the FEMAP v2020.1 output

First remark: Block451 is used by both MYSTRAN and FEMAP8.2 to collect results, but is deprecated in later versions in favor of block 1051.

Block451: titles used by MYSTRAN do not match FEMAP titles. This makes harder to write "solver-agnostic" parsers. From the uploaded files, here is the list with mismatch and missing :

That's all for now! thanks for reading and happy MYSTRANning !

Code:
| FEMAP vector Title        | FEMAP vector ID | MYSTRAN vector Title     | MYSTRAN vector ID |
|---------------------------+-----------------+--------------------------+-------------------|
| Total Translation         | 1               | RSS translation          | 10001             |
| T1 Translation            | 2               | T1  translation          | 10002             |
| T2 Translation            | 3               | T2  translation          | 10003             |
| T3 Translation            | 4               | T3  translation          | 10004             |
| Total Rotation            | 5               | RSS rotation             | 10005             |
| R1 Rotation               | 6               | R1  rotation             | 10006             |
| R2 Rotation               | 7               | R2  rotation             | 10007             |
| R3 Rotation               | 8               | R3  rotation             | 10008             |
| Total Applied Force       | 41              | RSS applied force        | 20001             |
| T1 Applied Force          | 42              | T1  applied force        | 20002             |
| T2 Applied Force          | 43              | T2  applied force        | 20003             |
| T3 Applied Force          | 44              | T3  applied force        | 20004             |
| Total Applied Moment      | 45              | RSS applied moment       | 20005             |
| R1 Applied Moment         | 46              | R1  applied moment       | 20006             |
| R2 Applied Moment         | 47              | R2  applied moment       | 20007             |
| R3 Applied Moment         | 48              | R3  applied moment       | 20008             |
| Total Constraint Force    | 51              | RSS SPC force            | 30001             |
| T1 Constraint Force       | 52              | T1  SPC force            | 30002             |
| T2 Constraint Force       | 53              | T2  SPC force            | 30003             |
| T3 Constraint Force       | 54              | T3  SPC force            | 30004             |
| Total Constraint Moment   | 55              | RSS SPC moment           | 30005             |
| R1 Constraint Moment      | 56              | R1  SPC moment           | 30006             |
| R2 Constraint Moment      | 57              | R2  SPC moment           | 30007             |
| R3 Constraint Moment      | 58              | R3  SPC moment           | 30008             |
| Total MultiPoint Force    | 151             | na                       | na                |
| T1 MultiPoint Force       | 152             | na                       | na                |
| T2 MultiPoint Force       | 153             | na                       | na                |
| T3 MultiPoint Force       | 154             | na                       | na                |
| Total MultiPoint Moment   | 155             | na                       | na                |
| R1 MultiPoint Moment      | 156             | na                       | na                |
| R2 MultiPoint Moment      | 157             | na                       | na                |
| R3 MultiPoint Moment      | 158             | na                       | na                |
| Total Summed GPForce      | 161             | na                       | na                |
| T1 Summed GPForce         | 162             | na                       | na                |
| T2 Summed GPForce         | 163             | na                       | na                |
| T3 Summed GPForce         | 164             | na                       | na                |
| Total Summed GPMoment     | 165             | na                       | na                |
| R1 Summed GPMoment        | 166             | na                       | na                |
| R2 Summed GPMoment        | 167             | na                       | na                |
| R3 Summed GPMoment        | 168             | na                       | na                |
| Total Applied GPForce     | 171             | na                       | na                |
| T1 Applied GPForce        | 172             | na                       | na                |
| T2 Applied GPForce        | 173             | na                       | na                |
| T3 Applied GPForce        | 174             | na                       | na                |
| Total Applied GPMoment    | 175             | na                       | na                |
| R1 Applied GPMoment       | 176             | na                       | na                |
| R2 Applied GPMoment       | 177             | na                       | na                |
| R3 Applied GPMoment       | 178             | na                       | na                |
| Total Constraint GPForce  | 181             | na                       | na                |
| T1 Constraint GPForce     | 182             | na                       | na                |
| T2 Constraint GPForce     | 183             | na                       | na                |
| T3 Constraint GPForce     | 184             | na                       | na                |
| Total Constraint GPMoment | 185             | na                       | na                |
| R1 Constraint GPMoment    | 186             | na                       | na                |
| R2 Constraint GPMoment    | 187             | na                       | na                |
| R3 Constraint GPMoment    | 188             | na                       | na                |
| Bar EndA Plane1 Moment    | 3000            | BAR EndA Plane1 Moment   | 50201             |
| Bar EndA Plane2 Moment    | 3001            | BAR EndA Plane2 Moment   | 50203             |
| Bar EndB Plane1 Moment    | 3002            | BAR EndB Plane1 Moment   | 50202             |
| Bar EndB Plane2 Moment    | 3003            | BAR EndB Plane2 Moment   | 50204             |
| Bar EndA Pl1 Shear Force  | 3004            | BAR EndA Pl1 Shear Force | 50205             |
| Bar EndA Pl2 Shear Force  | 3005            | BAR EndA Pl2 Shear Force | 50207             |
| Bar EndA Axial Force      | 3008            | BAR EndA Axial Force     | 50209             |
| Bar EndA Torque           | 3010            | BAR EndA Torque          | 50211             |
| Bar EndA Pt1 Bend Stress  | 3075            | BAR EndA Pt1 Comb Stress | 60301             |
| Bar EndA Pt2 Bend Stress  | 3076            | BAR EndA Pt2 Comb Stress | 60303             |
| Bar EndA Pt3 Bend Stress  | 3077            | BAR EndA Pt3 Comb Stress | 60305             |
| Bar EndA Pt4 Bend Stress  | 3078            | BAR EndA Pt4 Comb Stress | 60307             |
| Bar EndB Pt1 Bend Stress  | 3083            | BAR EndB Pt1 Comb Stress | 60302             |
| Bar EndB Pt2 Bend Stress  | 3084            | BAR EndB Pt2 Comb Stress | 60304             |
| Bar EndB Pt3 Bend Stress  | 3085            | BAR EndB Pt3 Comb Stress | 60306             |
| Bar EndB Pt4 Bend Stress  | 3086            | BAR EndB Pt4 Comb Stress | 60308             |
| Bar EndA Axial Stress     | 3107            | na                       | na                |
| Bar EndA Max Comb Stress  | 3109            | BAR EndA Max Stress      | 60309             |
| Bar EndA Min Comb Stress  | 3110            | BAR EndA Min Stress      | 60311             |
| Bar EndB Max Comb Stress  | 3111            | BAR EndB Max Stress      | 60310             |
| Bar EndB Min Comb Stress  | 3112            | BAR EndB Min Stress      | 60312             |
| Bar Tension M.S.          | 3113            | na                       | na                |
| Bar Compression M.S.      | 3114            | na                       | na                |
| Bush X Force              | 3774            | na                       | na                |
| Bush Y Force              | 3775            | na                       | na                |
| Bush Z Force              | 3776            | na                       | na                |
| Bush X Moment             | 3777            | na                       | na                |
| Bush Y Moment             | 3778            | na                       | na                |
| Bush Z Moment             | 3779            | na                       | na                |
| Bush TX Stress            | 3780            | na                       | na                |
| Bush TY Stress            | 3781            | na                       | na                |
| Bush TZ Stress            | 3782            | na                       | na                |
| Bush RX Stress            | 3783            | na                       | na                |
| Bush RY Stress            | 3784            | na                       | na                |
| Bush RZ Stress            | 3785            | na                       | na                |
| Elem C1 T1 GPForce        | 85000           | na                       | na                |
| Elem C1 T2 GPForce        | 85001           | na                       | na                |
| Elem C1 T3 GPForce        | 85002           | na                       | na                |
| Elem C1 R1 GPMoment       | 85003           | na                       | na                |
| Elem C1 R2 GPMoment       | 85004           | na                       | na                |
| Elem C1 R3 GPMoment       | 85005           | na                       | na                |
| Elem C2 T1 GPForce        | 85010           | na                       | na                |
| Elem C2 T2 GPForce        | 85011           | na                       | na                |
| Elem C2 T3 GPForce        | 85012           | na                       | na                |
| Elem C2 R1 GPMoment       | 85013           | na                       | na                |
| Elem C2 R2 GPMoment       | 85014           | na                       | na                |
| Elem C2 R3 GPMoment       | 85015           | na                       | na                |
| na                        | na              | BAR EndB Pl1 Shear Force | 50206             |
| na                        | na              | BAR EndB Pl2 Shear Force | 50208             |
| na                        | na              | BAR EndB Axial Force     | 50210             |
| na                        | na              | BAR EndB Torque          | 50212             |


.zip   mystran_femap_q1.zip (Size: 17.52 KB / Downloads: 2) ]]> <![CDATA[Femap with Mystran]]> https://www.mystran.com/forums/showthread.php?tid=59 Wed, 17 Feb 2021 09:22:34 +0000 SamiH.]]> https://www.mystran.com/forums/showthread.php?tid=59
I am experimenting with Mystran with Femap and would like to share and have comments on the observations, and after all would appreciate help to adjust the settings correctly. These may be sometimes Femap related questions or issues but also Mystran related. I have only done one analysis and haven't checked the Mystran documentation very carefully so that these might be more of a rookie type questions/observations.

First of all I am impressed how well the key results are in line with Simcenter Nastran results without any adjustments at all. Here's what I've done:
- opened up a random FE model consisting of plate elements, some glue contacts, and few RBE2 elements. The analysis for this had been done earlier using Simcenter Nastran.
- exported the analysis model (without any adjustments, i.e. Simcenter Nastran version)
- run it with Mystran
- imported the Femap neu file

The few things that caught my eye comparing the results:
- The deformation looks very similar by eye
- the max total translation in Simcenter Nastran was 1.883 mm and RSS translation in Mystran 1.909 mm, so no big difference (1.4 %)
- the max vonMises bot stress differs quite a lot but this is difficult to compare. See next observations. 
- the result scale (contour levels) is something odd. For these translations (max 1.909 mm) the scaling is from 0 to 1.826E+10 when it should be from 0 to 1.909. Of course I can change it manually but for automatic detection it seems to have some kind of scaling issue.
- the scaling issue seems to be the problem for dynamic rotation also. When tried to rotate the model even slightest of rotation will throw the model off the screen somewhere in the space and in practice the rotation can not be done.
- the element results are shown in transparent type of way in which it is difficult to observe which element is which when front and back and all in between are in a same spot. I couldn't figure out how to change this. This is not the same transparency as in Femap but something related to the results.
- the result vectors are numbered very differently from Nastran. There is also separated results for QUADs and TRIAs which is perhaps not very necessary but inconvenient sometimes

Has anyone any ideas how to improve the performance of Mystran results in Femap related to above mentioned observations? Can I adjust something somewhere?]]>
I am experimenting with Mystran with Femap and would like to share and have comments on the observations, and after all would appreciate help to adjust the settings correctly. These may be sometimes Femap related questions or issues but also Mystran related. I have only done one analysis and haven't checked the Mystran documentation very carefully so that these might be more of a rookie type questions/observations.

First of all I am impressed how well the key results are in line with Simcenter Nastran results without any adjustments at all. Here's what I've done:
- opened up a random FE model consisting of plate elements, some glue contacts, and few RBE2 elements. The analysis for this had been done earlier using Simcenter Nastran.
- exported the analysis model (without any adjustments, i.e. Simcenter Nastran version)
- run it with Mystran
- imported the Femap neu file

The few things that caught my eye comparing the results:
- The deformation looks very similar by eye
- the max total translation in Simcenter Nastran was 1.883 mm and RSS translation in Mystran 1.909 mm, so no big difference (1.4 %)
- the max vonMises bot stress differs quite a lot but this is difficult to compare. See next observations. 
- the result scale (contour levels) is something odd. For these translations (max 1.909 mm) the scaling is from 0 to 1.826E+10 when it should be from 0 to 1.909. Of course I can change it manually but for automatic detection it seems to have some kind of scaling issue.
- the scaling issue seems to be the problem for dynamic rotation also. When tried to rotate the model even slightest of rotation will throw the model off the screen somewhere in the space and in practice the rotation can not be done.
- the element results are shown in transparent type of way in which it is difficult to observe which element is which when front and back and all in between are in a same spot. I couldn't figure out how to change this. This is not the same transparency as in Femap but something related to the results.
- the result vectors are numbered very differently from Nastran. There is also separated results for QUADs and TRIAs which is perhaps not very necessary but inconvenient sometimes

Has anyone any ideas how to improve the performance of Mystran results in Femap related to above mentioned observations? Can I adjust something somewhere?]]> <![CDATA[pyNastran]]> https://www.mystran.com/forums/showthread.php?tid=53 Mon, 28 Sep 2020 20:08:46 +0000 mesheb82]]> https://www.mystran.com/forums/showthread.php?tid=53  - https://github.com/SteveDoyle2/pyNastran

I've added support for Mystran (the BDF and for the GUI).  You can flag the deck as a Mystran file by putting the following on the first line of your BDF:
$ pyNastran: version=mystran

If you just use the standard install, you won't have mystran support, but if you install from git (see the install guide), you will.
 - https://pynastran-git.readthedocs.io/en/...rom-source

There's probably still a few PARAMs that I'm not validating, so bug me over at:
 - https://github.com/SteveDoyle2/pyNastran/issues
if you find something wrong.

Also, an FYI, it's a bit stricter than Mystran (there's an embedded blank), so a card like:
SPC1, 1, 12 34, 42

is invalid, but:
SPC1, 1, 1234, 42

is fine.  That's just per the MSC/NX Nastran documentation, which I try to follow as best as I can.]]>  - https://github.com/SteveDoyle2/pyNastran

I've added support for Mystran (the BDF and for the GUI).  You can flag the deck as a Mystran file by putting the following on the first line of your BDF:
$ pyNastran: version=mystran

If you just use the standard install, you won't have mystran support, but if you install from git (see the install guide), you will.
 - https://pynastran-git.readthedocs.io/en/...rom-source

There's probably still a few PARAMs that I'm not validating, so bug me over at:
 - https://github.com/SteveDoyle2/pyNastran/issues
if you find something wrong.

Also, an FYI, it's a bit stricter than Mystran (there's an embedded blank), so a card like:
SPC1, 1, 12 34, 42

is invalid, but:
SPC1, 1, 1234, 42

is fine.  That's just per the MSC/NX Nastran documentation, which I try to follow as best as I can.]]> <![CDATA[hfcMystran - Pre/Post processing for Mystran]]> https://www.mystran.com/forums/showthread.php?tid=52 Fri, 25 Sep 2020 01:36:48 +0000 ceanwang]]> https://www.mystran.com/forums/showthread.php?tid=52
The project is at https://github.com/ceanwang/hfcMystran

Some case photos could be seen from here:
https://forum.freecadweb.org/viewtopic.php?f=18&t=46171

Regards,

Cean]]>
The project is at https://github.com/ceanwang/hfcMystran

Some case photos could be seen from here:
https://forum.freecadweb.org/viewtopic.php?f=18&t=46171

Regards,

Cean]]> <![CDATA[Gmsh]]> https://www.mystran.com/forums/showthread.php?tid=43 Wed, 19 Aug 2020 06:35:47 +0000 JuanP74]]> https://www.mystran.com/forums/showthread.php?tid=43


I would recommend gmsh, at least for postprocessing. The MSH file formats (ASCII and binary) are very well suited for it in my experience (small, medium model sizes) and in ascii format easy to check and modify if necessary. Plotting capabilities are as good as femap and allows for nodal and elemental results. I have created the files with text processor sometimes for small models using f06 results. I think is as good as femap .neu file and easier to read and can be used with a software that is free & open source that does not need installation and runs in all platforms (macOS, windows and linux).

http://gmsh.info/doc/texinfo/gmsh.html#M...egacy_0029

I attach an example so you can check by yourselves (this is an ascii file in legacy format 2) for normal modes of a small model (remove .txt extension before opening with gmsh).

.txt   shelf.msh.txt (Size: 16.36 KB / Downloads: 10) ]]>


I would recommend gmsh, at least for postprocessing. The MSH file formats (ASCII and binary) are very well suited for it in my experience (small, medium model sizes) and in ascii format easy to check and modify if necessary. Plotting capabilities are as good as femap and allows for nodal and elemental results. I have created the files with text processor sometimes for small models using f06 results. I think is as good as femap .neu file and easier to read and can be used with a software that is free & open source that does not need installation and runs in all platforms (macOS, windows and linux).

http://gmsh.info/doc/texinfo/gmsh.html#M...egacy_0029

I attach an example so you can check by yourselves (this is an ascii file in legacy format 2) for normal modes of a small model (remove .txt extension before opening with gmsh).

.txt   shelf.msh.txt (Size: 16.36 KB / Downloads: 10) ]]> <![CDATA[Converter]]> https://www.mystran.com/forums/showthread.php?tid=36 Sun, 24 May 2020 22:10:12 +0000 Admin]]> https://www.mystran.com/forums/showthread.php?tid=36 <![CDATA[Mecway Pre/Post]]> https://www.mystran.com/forums/showthread.php?tid=29 Wed, 13 May 2020 02:06:48 +0000 Admin]]> https://www.mystran.com/forums/showthread.php?tid=29 https://mecway.com/).

There is an internal solver and it also has support for CaclculiX. This program is still in development and it might be possible to add MYSTRAN support.

While this is not a free program, it is low cost and there is a free 1,000 node version. I like this program a lot, especially as you become more familiar with it. If you would like to see MYSTRAN support, you may want to mention this to the author.]]> https://mecway.com/).

There is an internal solver and it also has support for CaclculiX. This program is still in development and it might be possible to add MYSTRAN support.

While this is not a free program, it is low cost and there is a free 1,000 node version. I like this program a lot, especially as you become more familiar with it. If you would like to see MYSTRAN support, you may want to mention this to the author.]]> <![CDATA[FreeCad]]> https://www.mystran.com/forums/showthread.php?tid=24 Wed, 29 Jan 2020 21:34:22 +0000 vittorio]]> https://www.mystran.com/forums/showthread.php?tid=24 A nastran thread is already on its forum. 
Vittorio 
https://forum.freecadweb.org/viewtopic.php?f=18&t=12753]]> A nastran thread is already on its forum. 
Vittorio 
https://forum.freecadweb.org/viewtopic.php?f=18&t=12753]]> <![CDATA[FERESPOST]]> https://www.mystran.com/forums/showthread.php?tid=23 Wed, 29 Jan 2020 21:07:56 +0000 vittorio]]> https://www.mystran.com/forums/showthread.php?tid=23 Maybe it could be used also with Mystran or Nastran-95 op2 files. 
Vittorio

https://www.ferespost.be/]]> Maybe it could be used also with Mystran or Nastran-95 op2 files. 
Vittorio

https://www.ferespost.be/]]> <![CDATA[PRE/POST OPTIONS FOR MYSTRAN]]> https://www.mystran.com/forums/showthread.php?tid=14 Mon, 20 Jan 2020 02:28:19 +0000 Admin]]> https://www.mystran.com/forums/showthread.php?tid=14
While there are commercial programs that can use MYSTRAN, such as MSC Patran and Femap, these programs are expensive and are usually combined with their own solvers. Instead, this thread will present low cost or free/open pre/post software that works with MYSTRAN.

Using the OP2 interface, you can read large result files quickly and efficiently. Additionally, you can also extract a subset of the result data and write OP2/F06 result files.

FYI, see also this repository: https://github.com/MYSTRANsolver/MYSTRAN_Resources

BDF Readers

A BDF (Bulk Data File) or DAT file reader can be read to interrogate models, but are not all programs can be used to create a mesh, apply loads, etc.

pyNastran ( https://github.com/SteveDoyle2/pyNastran )
Using the BDF interface, you can read/edit/write Nastran geometry without worrying about field formatting. Many checks are also performed to verify that your model is correct.

FEX
A lightweight program (only 3MB) that can read and interrogate BDF files. It can be used to visually show the model, discover issues, measure, and perform various other operations. It has a built in tutorial and low learning curve. I found this to be a simple tool that is quite useful. It does not have post processing capabilities

This program no longer has a website, but the most recent version (1.1), can be downloaded here: https://www.mystran.com/misc/fex-1.1.zip

M3DFEA (http://www.m3dfea.com )
See below for additional information

LS-PrePost ( https://www.lstc.com/products/ls-prepost )
This is a pre/post that can create finite element models and can also read BDF files. See below for more information.

PreProcessors (With Native MYSTRAN Support)

Preprocessors have the ability to create geometry, a mesh, apply loads, etc. However, not all preprocessors can create a compatible MYSTRAN deck (BDF/DAT). These are programs that can natively create a NASTRAN deck. This is a significant advantage because the elements are linked to properties (among other things).

M3DFEA ( http://www.m3dfea.com )
A pre/post that supports NASTRAN (and MYSTRAN by extension). It is a free program, but not open source. It has only been evaluated on a preliminary basis, but looks like a promising option.


PreProcessors (Without Native MYSTRAN Support)

Mecway ( https://www.mecway.com)
Apre/post and has an internal Mecway solver as well. It also supports the CalculiX solver. A simple mesh converter has been partially developed, but a true translator from BDF to INP (CalculiX/ABAQUS) has not been developed. This may be a possible option in the future since pyNastran has some capabilities to do this. Although Mecway is not free, it is low cost.

LS-PrePost (https://lsdyna.ansys.com/download-install-overview/ links to here: https://ftp.lstc.com/anonymous/outgoing/lsprepost/ )
This is a pre/post that can create finite element models, but not native MYSTRAN decks. However, we are working on a generic converted that can covert nodes/elements from one program to another. While this is not the same as creating a BDF (in fact it is quite different), it may be functional approach for specific models. For example, models with only a few element types but where a very good geometry/mesh creation tool is required.

PostProcessors

pyNastran ( https://github.com/SteveDoyle2/pyNastran )
Open source and can post-process OP2 files. pyNastran is a very complete postprocessor. Also, the developer assists with MYSTRAN and developed the MYSTRAN OP2 files, which helps to ensure compatibility. pyNastran is considered to be the most native MYSTRAN post processor (there is also a BDF switch that can be turned on to improve postprocessing with MYSTRAN).

M3DFEA ( http://www.m3dfea.com )
A pre/post that supports NASTRAN (and MYSTRAN by extension). It is a free program, but not open source. It has only been evaluated on a preliminary basis, but looks like a promising option.

LS-PrePost ( https://www.lstc.com/products/ls-prepost )
This is a pre/post that can read NASTRAN Punch (PCH) files. We need to evaluate if it can read MYSTRAN Punch files.

Other

1D Elements (https://www.structuralfea.com/ )
A program that can use beam, rod, and spring elements in 2D space (linear static analysis, buckling analysis, natural frequency analysis). It has complete documentation and series of videos that explain how the program works. This program is not a general pre/post. Rather, it is a specific tool limited to beams, rods, and springs in 2D space.]]>
While there are commercial programs that can use MYSTRAN, such as MSC Patran and Femap, these programs are expensive and are usually combined with their own solvers. Instead, this thread will present low cost or free/open pre/post software that works with MYSTRAN.

Using the OP2 interface, you can read large result files quickly and efficiently. Additionally, you can also extract a subset of the result data and write OP2/F06 result files.

FYI, see also this repository: https://github.com/MYSTRANsolver/MYSTRAN_Resources

BDF Readers

A BDF (Bulk Data File) or DAT file reader can be read to interrogate models, but are not all programs can be used to create a mesh, apply loads, etc.

pyNastran ( https://github.com/SteveDoyle2/pyNastran )
Using the BDF interface, you can read/edit/write Nastran geometry without worrying about field formatting. Many checks are also performed to verify that your model is correct.

FEX
A lightweight program (only 3MB) that can read and interrogate BDF files. It can be used to visually show the model, discover issues, measure, and perform various other operations. It has a built in tutorial and low learning curve. I found this to be a simple tool that is quite useful. It does not have post processing capabilities

This program no longer has a website, but the most recent version (1.1), can be downloaded here: https://www.mystran.com/misc/fex-1.1.zip

M3DFEA (http://www.m3dfea.com )
See below for additional information

LS-PrePost ( https://www.lstc.com/products/ls-prepost )
This is a pre/post that can create finite element models and can also read BDF files. See below for more information.

PreProcessors (With Native MYSTRAN Support)

Preprocessors have the ability to create geometry, a mesh, apply loads, etc. However, not all preprocessors can create a compatible MYSTRAN deck (BDF/DAT). These are programs that can natively create a NASTRAN deck. This is a significant advantage because the elements are linked to properties (among other things).

M3DFEA ( http://www.m3dfea.com )
A pre/post that supports NASTRAN (and MYSTRAN by extension). It is a free program, but not open source. It has only been evaluated on a preliminary basis, but looks like a promising option.


PreProcessors (Without Native MYSTRAN Support)

Mecway ( https://www.mecway.com)
Apre/post and has an internal Mecway solver as well. It also supports the CalculiX solver. A simple mesh converter has been partially developed, but a true translator from BDF to INP (CalculiX/ABAQUS) has not been developed. This may be a possible option in the future since pyNastran has some capabilities to do this. Although Mecway is not free, it is low cost.

LS-PrePost (https://lsdyna.ansys.com/download-install-overview/ links to here: https://ftp.lstc.com/anonymous/outgoing/lsprepost/ )
This is a pre/post that can create finite element models, but not native MYSTRAN decks. However, we are working on a generic converted that can covert nodes/elements from one program to another. While this is not the same as creating a BDF (in fact it is quite different), it may be functional approach for specific models. For example, models with only a few element types but where a very good geometry/mesh creation tool is required.

PostProcessors

pyNastran ( https://github.com/SteveDoyle2/pyNastran )
Open source and can post-process OP2 files. pyNastran is a very complete postprocessor. Also, the developer assists with MYSTRAN and developed the MYSTRAN OP2 files, which helps to ensure compatibility. pyNastran is considered to be the most native MYSTRAN post processor (there is also a BDF switch that can be turned on to improve postprocessing with MYSTRAN).

M3DFEA ( http://www.m3dfea.com )
A pre/post that supports NASTRAN (and MYSTRAN by extension). It is a free program, but not open source. It has only been evaluated on a preliminary basis, but looks like a promising option.

LS-PrePost ( https://www.lstc.com/products/ls-prepost )
This is a pre/post that can read NASTRAN Punch (PCH) files. We need to evaluate if it can read MYSTRAN Punch files.

Other

1D Elements (https://www.structuralfea.com/ )
A program that can use beam, rod, and spring elements in 2D space (linear static analysis, buckling analysis, natural frequency analysis). It has complete documentation and series of videos that explain how the program works. This program is not a general pre/post. Rather, it is a specific tool limited to beams, rods, and springs in 2D space.]]> <![CDATA[PRE/POST processing]]> https://www.mystran.com/forums/showthread.php?tid=13 Sat, 18 Jan 2020 20:03:45 +0000 vittorio]]> https://www.mystran.com/forums/showthread.php?tid=13 have a look at 
http://www.f-e-x.com/
FEX is a free program that can read  Nastran INPUT and view/check the model
Bye
Vittorio]]> have a look at 
http://www.f-e-x.com/
FEX is a free program that can read  Nastran INPUT and view/check the model
Bye
Vittorio]]>