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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 


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Merula last won the day on May 13

Merula had the most liked content!


About Merula

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    Expert User

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    Topology, Thermal Simulation, Optimization
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  1. Thanks for your help tinh! You know, I copied from the Reference Guide as you suggested, but as I opened my model with the "ADDMODEL" Command, it didnt get the line: (result_handle GetResultMathCtrlHandle rmath_handle) which no I realized was the mistake in the code. Just in case another has troubles with that. You have to get your model id with: [ AddResultMathAnalysis ... ]
  2. Python

    Super interested in this. !!
  3. Python

    SO +1 for this. I know there were plans for a complete python interface but as far as I know its not under development currently, so you have to stick with .tcl scripting which is ok. Best regards
  4. I also tried Voxel vs. Tetra and came to the same conclusions. Did you ever encounter Voxel Mesh exeeding the limits of the design space geometry ? Can we prevent this from happening ? Thanks and best regards, Merula
  5. [Bug?] Meshing changes input Geometry

    The geometry has been modeled in 3d via Opencascade, the middlesurface has been extracted, so the surface comes from hypermesh geometry operation. If the meshing does not change the geometry, why can you see the visualization change when I press "Return" after the mesh. @tinh The mesh as the real boundary of the geometry would be ok for this case as the point gets nearly touched by the mesh line. I can see why HM would adapt the mesh there. .Step File attached. Thanks again for your kind replies DesignSpace_comp.step
  6. [Bug?] Meshing changes input Geometry

    Thanks for your replies. The problem I saw in this was not that the mesh is not at the desired location but that meshing changes the geometry which it should never do from my understanding. If it is just a visualization issue as tinh suggested, turning up the refinment layer should result in the same visualization as before the mesh, which it doesn't. So my question is: Has the geometry changed (before / after the mesh), and if yes, why and if thats a bug or completely normal behaviour. Thanks for your help!
  7. Hey guys, maybe I am unaware of a setting which causes this, but at least to me, this is strange. I have a modified version of the CClip Tutorial and when I mesh it, the geometry changes and neither the geometry nor the mesh has a node where it should be. .gif and .hm attached. Thanks in advance, Merula meshChangesGeom.hm
  8. Symmetry Constrains

  9. Symmetry Constrains

    Is this like assigning the nodes of the surface to the cylindrical coordinate system? Because I found no option to assign a spc to a other coordinate system (other like forces, which can be assigned)
  10. Mesh / Stress Convergence Study with Hypermesh

    That would be awesome!
  11. _s1.h3d File Iteration 0 Stress Interpretation

    Hi @Prakash Pagadala, so just to get this straight: The Volfrac Value is related to the element initial density value. If it is 0.6 (with compliance as the objective), Iteration 0 should have the same as an analysis with 0.6 * E0 ? Best regards, Merula
  12. Hello guys, what exactly is the first (0) Iterations stress contour plot? It differs from the stress output you get when doing an analysis. I am aware, that the topology optimization solver sets the density value euqally distributed over all elements to some start value which is 0.3 I think. But then I would expect to see 3 times the stress in an linear optimization (Iteration0) compared to a linear analysis? Thanks in advance. Best regards, Merula
  13. Hey, lately someone pointed out the possibility to do automated mesh convergence studies within Ansys workbench. Example: Is something similar available for Hypermesh / Optistruct ?? As this is an often executed task I hope to find a way which does not include setting up the mesh entirely new with forces, boundary conditions and such. Thanks so much in advance for your help. Best regards, Merula.