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PRE/POST OPTIONS FOR MYSTRAN
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MYSTRAN is largely compatible with programs that support BDF files. However, it does not currently have an OP2 output (currently in development by Steve Doyle). 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.

-------------FULL PRE/POST OPTIONS:-------------
A "Full Pre/Post Option" is considered to be a software that can create a BDF/mesh, apply loads/constraints, run the MYSTRAN solver, read MYSTRAN output, and post-process the results.

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.

M3DFEA ( http://www.m3dfea.com ) is 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.


-------------BDF Readers:-------------
A BDF (Bulk Data File) can be read by various programs. The programs can interrogate models, but are not 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. Using the OP2 interface, you can read large result files quckly and efficiently. Additionally, you can also extract a subset of the result data and write OP2/F06 result files.

FEX ( http://www.f-e-x.com/ )
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.


-------------PreProcessors:-------------
Mecway ( https://www.mecway.com) is a pre/post and has an internal solver as well. Since it supports CalculiX, we are looking into an ABAQUS to NASTRAN converter. That way Mecway can be used as a preprocessor and send a converted file to MYSTRAN. Postprocessing can be done in pyNastran. Though Mecway is not free, it is low cost.

M3DFEA ( http://www.m3dfea.com ) is 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.


-------------PostProcessors:-------------
pyNastran ( https://github.com/SteveDoyle2/pyNastran ) can post-process OP2 files. Once OP2 output is added to MYSTRAN, pyNastran is a good option. It is open source as well.

M3DFEA ( http://www.m3dfea.com ) is 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.

-------------To Be Evaluated:-------------

CalculiX GraphiX (F06 capability pending evaluation)
GMSH
Salome-Meca
Paraview


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PRE/POST OPTIONS FOR MYSTRAN - by Admin - 01-20-2020, 02:28 AM

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