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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. 

George P Johnson

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George P Johnson last won the day on August 15

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About George P Johnson

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    HyperWorks Specialist

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  1. Engine file not avalaible in Radioss..what to do??

    Hi Ashish, You can create the engine cards from the solver browser (View>Solver Browser, right click in Solver Browser and select required cards).
  2. Contact

    Hi Sandeep, Please contact the Ls Dyna support , as this is solver specific.

    Hi, You can create the engine cards from the solver browser (View>Solver Browser, right click in Solver Browser and select required cards).

    Please go through OS-1325: Random Response Analysis of a Flat Plate tutorial in Help Menu which shows postprocessing the PSD results.
  5. eigenvalue

    Hi, The eigenvalues are used to determine the natural frequencies of vibration, and the eigenvectors determine the shapes of these vibrational modes. Please go through the below post which will be helpful for you:
  6. Issues with Student version

    Hi, In the earlier versions there was no separate OptiStruct user profile for linear static analysis problems. It was RADIOSS (Bulk) and later. I think from HyperWorks version 12.0 onwards, it was made under OptiStruct user profile. Unfortunately this tutorial was not updated but it will be done very soon.
  7. Query on meshing

    Hi Amar, I think for 'good mesh' you are meaning a fine mesh. Fine mesh does not mean good mesh.The purpose of meshing is to get solutions in discrete locations. Good mesh is the mesh that serves your project objectives. So, as long as your results are accurate enough for your project, your mesh is sufficiently good. The most fundamental and accurate method for evaluating mesh quality is to refine the mesh until a critical result, such as the maximum stress in a specific location converges (i.e. it doesn’t change significantly with each refinement). Normally if a mesh is too dense, it will require a large amount of computer memory and long run times, especially for nonlinear and transient analyses. In such cases the critical regions are meshed fine so that the results at those region are well captured. The user has to judge on this based on the model, analysis and experience. Please go through Practical Aspects of Finite Element Simulation (A Study Guide) ebook which contains all practical concepts on FEA with examples.
  8. Stress intensity factor

    Hi, As of now I don’t think there it is possible to calculate the stress intensity factor in RADIOSS. But I'll check regarding the same and will update if I get any more information on the same.
  9. Radioss Output

    Hi Jonas, You can create a moving skew in RADIOSS, but it will not be exported for post processing.
  10. Hello George,

    I've given you the model setup in the attached image. Initially the assembly has to run at 2000 rpm along Z axis and then a torque of 800 Nm will be applied on the master pilot node of flange (the whole assembly is in rotating condition and then torque is applied on flange to compress the springs).


    Kindly help me to setup the boundary condition. Here the guide and block should not move radially outwards. Only the spring and flange will have the radial expansion effect.


    1. Thulashi Raman

      Thulashi Raman

      Hello George, Can you please respond to this query? It would be much helpful. Thanks

    2. George P Johnson

      George P Johnson

      Hi Thulashi,

      We will not be notified when queries are posted in the profile. 

      Please post the same in the forum http://forum.altairhyperworks.com/index.php?/forum/103-ind-radioss-for-impact-safety-non-linear-explicit-applications/ and we will follow up from here.




    3. Thulashi Raman

      Thulashi Raman

      Thanks for letting me know.

  11. compatibility of mixed mesh with the explicit analysis

    HI Amar, As a general note it was mentioned. Ensure the connectivity and you can continue.
  12. Contact Type2 issue

    Hi Jonas, I varied some parameters in the file and uploading the same for your reference. Any unclear data provided during material characterization will lead to uncertain results. So user should have all these correct inputs. As suggested before you can also try with other visco elastic material cards. Check.rar
  13. Radioss Output

    Hi Jonas, For measuring the angle in HyperView, create two system in HyperView (Model>Create>Systems) and from Measures panel you can check the relative angle between two nodes or systems.
  14. Single Solid Element Testing

    Hi Jonas, This could be due to the material characteristics. Also, you can try the same with different solid element (Isolid) formulation and review the outcome.
  15. h3d for FEMFAT

    Hi, I think it is supported in the FEMFAT latest version. Can you please try with the same?.