Which software its FE model can be imported to MSC

[Wazy01]

Good Day All

I need to use the MSC fatigue emebedded solver. Also, I am not familar with Patran enviroment to build a model. Can I import a FE model (geometry and the desgined mesh) to MSC Patran so I can run the MSC fatigue solver, Please? I saw that Patran can import geometry file but what about the models. I feel more confident with other common software to build my model, do partition to control mesh, and then mesh part.

Is there FE software can export model to Patran?
Is MSC Patran can translate the imprted models without loss entities
Is it the best and one option is to build the model in Patran
Do you have any suggested in this regards please?

Thanks for your suggestion

 

[karachun]

Usualy diferent CAE programs import geometry and mesh separately, though open or commercial geometry interfaces. Mesh and analisys setting is just text files. Check if msc fatigue results can be imported to your software, in this case you can import mesh and setting to patran then run fatigue solver, import results to your program and efficiently postprocess it.

 

[Wazy01]

Thanks Karachun for your response
I am interesting in prepossessing than post possessing, so the msc fatigue is a solver which is assigned to Patran models. In prepossessing part need to either build FE model in Patran or imported to patran from other softwares. my question is which FE software could by used to build the FE model and then it is possible to be imported to Patran for analysis using the MSC solver. I am wondering why cant use MSC Nastran solver directly using FE model withoout going through Patran as a gate for prepossessing,.

Thanks

 

[karachun]

Many solvers can be launched directly, without gui - check MSC Nastran documrntation. Search in google "msc nastran batch run". In NX Nastran I search in program directory/nastran/bin/nastran.exe launch it and select in new window inut files I want to run. Almost all commercial CAE programs have nastran interface. As I know Femap can import complete input file - mesh, loads, cpnstraints, solver setting.

 

[Wazy01]

Thanks karachun for following up,

It is really good idea! and it works in NX Nastran as you already build your case control (load type, and BC, output files)in the software and NX run for specified analysis. I cannot do that in MSC Nastran, why?
I need to use Patran to assign the FATPARM the parameter for fatigue analysis before run the analysis in the solver of Nastran.
In summary, we need 1-FE model, 2-LOAD & BC, 3-choose analysis type and assign parameter if needed, then 4- run solver.
steps 1& 2 can be built in any FE software and if possible to import them to Patran then we can choose the analysis in my case fatigue using FatParam.

It seems to me there is no big chance I can import FE model to Patran and then run assign fatigue (sub-case)and run the analysis
Thanks

 

[dmapguru]

MSC Nastran can be used in 2 different fatigue workflows.

Workflow 1. The one you have already mentioned, which is called MSC.Fatigue. This uses the MSC Nastran solver to compute the stresses, output to the post processing op2 file. The stresses are then recovered in the MSC.Fatigue software. The MSC.Fatigue software uses the Patran environment to allow the fatigue problem to be setup, and then uses the MSC.Fatigue solver to solve the fatigue problem. This workflow is more for historic reasons, and also allows solvers other than MSC Nastran to provide the stresses.

Workflow 2. MSC Nastran has 2 integrated fatigue solvers called NEF (Nastran Embedded Fatigue - statics & transient problems) and NEVF (Nastran Embedded Vibration Fatigue - frequency domain problems). These contain elements of the MSC.Fatigue solver as well as those from a third party. The idea is to solve the stress computation and fatigue problem in one go. MSC Nastran has an interface (bulk data entries) to define the complete fatigue problem: fatigue material properties, events, duty cycles, rainflow counting, etc.. The gain here is you solve the fatigue problem _much_ faster and without the transfer of huge results data sets from stress solver to fatigue environment.

DG

 

[Wazy01]

Thanks dmapguru