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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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  1. center of gravity

    Hi, What is the unit of moment of inertia displayed here in summary? Regards SUBHU
  2. AMS

    Hi All, I am Running a Frontal crash Analysis. Will AMS suit for this. The time step is not reaching the target value. But the energy error is increasing from the beginning. Need Hellp. Regards, SUBHU

    Hi All, 10 0.1266E-05 0.1266E-06 SPRIN 590305 0.0% 0.4177E-01 0.2840E+09 0.3311E-03 6.050 0.2584E-03 WARNING MINIMUM TIME STEP -0.4725E+18 IN INTERFACE 784 (DTMIN= 0.0000E+00) Is the time step goes in negative.!!! I haven't specified any values for dtmin in my type7 interface (id .784). But I am getting this warning at the start of my engine. Any Hint PLs. Regards, SUBHU
  4. MAT LAW 36 - PLAS TAB

    Hi All, Does the MAT LAW 36 takes only plastic strain vs stress curve or total strain vs stress curve.? Regards, Subhu
  5. External Forces Work

    The External Work Forces is Decreasing. Is this Good??
  6. External Forces Work

    HI All, I am running a crash analysis. I have no external force applied to my model except initial velocity and gravity. the model is set to impact on a rigidwall Will the External Forces Work remains constant or increase or decrease?? THANKS in Advance Regards, SUBHU
  7. Spot Weld In Optistruct

    Hi All, Is it possible to create RBE2- Beam-RBE2 Spot weld for Optistruct Template. Will it be good for bending stiffness analysis? Or the stiffness get increased? Thanks and Regards, Subhu Rathina Vel

    Hi George, I am doing a roll over crash Analysis. Using type7 for global contact. In Simulation, while using "6 for Inacti " in Typer 7 , the simulation runs good. While setting "0 for Inacti" , the mass increases steeply and so the error. P.S.: I am defining the time step using /DT/NODA/CST/0 0.9 0.0004 Any Tip pls. Thanks in Advance.
  9. Hi George... I am running a Roll over crash analysis.


    In Simulation The mass increases enormously...


    Any Tip pls

    1. George P Johnson

      George P Johnson

      Hi Subhu,

      Check the time step imposed in the model, which will increase the model mass.

      Reduce the imposed time step value. Optimally it is advisable to have 2-3 % mass error.


      PS: Always post queries in the forum. We will not be notified when you post queries in your profile and so we will miss to reply.

  10. Radioss Parallel computing SPMD

    Does the above process also needs to set up cluster?? If so, is it possible to setup virtual cluster with Ethernet connection?
  11. Radioss Parallel computing SPMD

    Thanks George. Can I have an example hostfile and appfile. -Subhu
  12. Radioss Parallel computing SPMD

    Hello Everyone! I am using Hyperworks 14.0. I Have two 8 core machine and I want to run a large analysis. Is it possible to run parallel in both machines using spmd ? Kindly guide me how to do. Thanks in Advance. P.S.: I have needed license
  13. Geometric non-linear Implicit Dynamics

    OS-1500: Nonlinear Implicit Analysis of Bending of a Plate
  14. Hi Rahul, Thanks. But I have no problem in solving modal analysis with preload. I have to do a response spectrum analysis, for which I have to use the preloaded modes. I have saved the eigv file on the modal analysis. On retrieving the file using Eigen retreive in RSPEC analysis throws an error as I mentioned above.
  15. To add a point, I have created 79 pretension bar elements. In modal Anlaysis, I have found the preloaded/ pre stressed modes. This 79*6 = 474, is doing something, that I am un able to figure out.