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Rahul R

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Everything posted by Rahul R

  1. Please refer to below post and the best practices document pdf shared in last reply.
  2. Could you directly attach the tutorial pdf which you are referring?Please check whether solver writes .out file or not? If possible share .out and .fem file.
  3. Which version of Inspire you are using? Did you try with any other manufacturing constraints. If possible please share the .stmod file.
  4. Compliance is negative or large, generally this warning comes for modelling error.In your shared file, i see you meshed some 3d enclosed voulme section with 2d mesh/penetraion because of overlap of thickness.
  5. Global Response Search Method (GRSM) & Multi - Objective Genetic Algorithm (MOGA) is used for multiobjective optimization in HyperStudy.You could find more info in online help under optimization method section.
  6. If you are using Student edition, then you may not be able to use the point release. Please check the details below for the research license. https://altairuniversity.com/researcher/success-is-the-ability/
  7. All Optimization disciplines using nonlinear solution with contact only has been supported in OS for a long time.In V2018, nonlinear responses have been added.Contact pressure and contact force from both S2S and N2S contacts can now be used as a response (DRESP1) in optimization formulation. Refer attached model for contact pressure response for shape optimization. Use latest version and refer online help for detailed information. 80_Contpres_model.fem
  8. If you are a commercial customer then please upgrade to HW Desktop 2019.1 (hotfix is 2019.1.1)and for solvers OptiStruct 2019.1 (hotfix is 2019.1.1)
  9. As mentioned above this is available with OptiStruct 2019.1 version. In OptiStruct the MATVE bulk data entry defines the material properties for Viscoelastic materials. MATVE is only supported for Small displacement nonlinear static and transient analysis.& Solid elements both first and second order (CHEXA,CTETRA,CPENTA,CPYRA) are currently supported.Let me know if you need the demo file for same.
  10. Could you please try running this with OptiStruct 2019 or higher version?If possible please share the required .Fem file available in my signature.Files uploaded in dropbox is not working.
  11. Currently shell and membrane for MATHE is not supported.PFA highlights of OptiStruct 2019.1.
  12. Defines the properties of nonlinear hyperelastic solidelements, referenced by CHEXA, CPENTA, and CTETRA Bulk Data Entries. The MATHE hyperelasticmaterial can be referenced to define corresponding material properties.
  13. Either the PSOLID or PLSOLID Bulk Data Entry can be used to reference the MATHE Bulk Data Entry.
  14. Do you want to measure the difference between two curves for optimization?
  15. Rahul R


    Tabled1 in OptiStruct is to defines a tabular function for use in generating frequency-dependent and time-dependent dynamic loads.
  16. DEQUATION needs to be referenced to DRESP2. Here is an example. $ DRESP1 1 R1 STRESS ELEM SVM3 1 DRESP1 2 R2 STRESS PSHELL SVM4 1 DRESP2 3 MA 1 + DRESP1L 4 0 + DRESP1L 2 2 DRESP1 4 vol VOLUME DEQATN 1 f(a,b)=a+b $ Please check your OS solver deck. Hope it helps.
  17. Could you please share the .out file of the run? Also if RBE3s in the models that is causing the issues then remove and replace it with RBE2s.
  18. Responses defined in DRESP2 can be used as design objectives or constraints. Please refer attached document for same. DRESP2_and_DRESP3.pdf
  19. The sensitivity is available for retained response. You can use DSCREEN to retain the responses. See the user’s guide for Gradient-based Optimization Method. Gradient Based.pdf
  20. Radiation heat transfer is not yet supported in OptiStruct.You could check for Altair Radioss & Altair AcuSolve for such cases.
  21. Dear All, Please check below video to gain benefit, if you use the Part-Browser instead of assemblies. Assemblies_PartBrowser.mp4
  22. Could you pleas make sure to keep elements that are part of the optimization design-space must have a separate property card from the non-design elements.
  23. You could check for Altair OptiStruct and Altair Seam for above requirements.
  24. PFA 1_Quick_Free_Free_Modal.zip 1_Quick_Free_Free_Modal.7z
  25. As per the message mentioned in status bar this import needs separate licence or try importing in other cad format.
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