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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. 

Karthic

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About Karthic

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  1. displacement result in direct transient analysis

    Hi @Prakash Pagadala , The results from Direct transient are absolute without using ENFMOTN>>REL and also ENFMOTN REL does not work with Direct transient analysis. If so, is there any way for direct transient to give the real result?
  2. Geo nonlinear (Implicit dynamic)

    Hi Prakash, Please go through my question once again. I am clear that NLSTAT ignores inertia and mass effects. whats the difference between Geometric nonlinear implicit static and Nonlinear Quasi-static analysis.
  3. Geo nonlinear (Implicit dynamic)

    Hi Prakash, If Nonlinear Quasi-static analysis considers the Geometric Nonlinearity(LGDISP). whats the difference between the Geometric nonlinear implicit static and Nonlinear Quasi-static analysis ?? Thank you Prakash.
  4. Hi, 1. Whether Geo nonlinear (Implicit dynamic) analysis is inclusion of Inertia and Momentum terms ?? 2. I think Geo nonlinear (Implicit static) does not include Inertia and Momentum............. Geo nonlinear (Explicit dynamic) include Inertia and Momentum. Please share your comment related to my query
  5. Non linear Transient Analysis

    Hi Prakash, Any relevant materials for the doubt ?
  6. NLOAD1 for GRAV

    Hi Prakash, Ya i gone through it, my run is working fine with NLSTAT. But in NLGEOM run contact is working, but i have Non-convergent nonlinear iterations RADIOSS IMPLICIT STOPPED DUE TO TIMESTEP LIMIT ** ISTOP=-2 Any updates from your side regarding the NLGEOM model that i shared ? Thank you for the support. annimation.avi
  7. NLOAD1 for GRAV

    Hi Prakash, In NLSTAT i find option to call the FLLWER card. ( Encircled in the attached image) But in NLGEOM i dont find the option to call the FLLWER load card ? even then will NLGEOM support follower load ?
  8. NLOAD1 for GRAV

    Hi Prakash, Is FLLWER card must for follower force ? Follower force is currently only supported for large-displacement nonlinear static analysis subcases ?? can i specify follower load for NLGEOM ?
  9. NLOAD1 for GRAV

    Hi Prakash, you mean Analysis type- NLSTAT with Subcase options, type - Transient non linear ? But i don't find such a subcase option for NLSTAT. Also i need to know Is there any option to delete/remove the specified element from the model (say spring, beam) once the run have started its convergence ?
  10. NLOAD1 for GRAV

    Hi Prakash, Is it possible to give Tabled1 load(0-100N) in NLSTAT ? Is there any option to delete/remove the specified element from the model (say spring, beam) once the run have started its convergence ?
  11. NLOAD1 for GRAV

    Hi Prakash, Any update reg- the model convergence issue
  12. NLOAD1 for GRAV

    Hi Prakash, Thank you.... I am trying Geom-nonlinear in Optistruct. Please guide me in solving the Non-convergent nonlinear iterations RADIOSS IMPLICIT STOPPED DUE TO TIMESTEP LIMIT ** ISTOP=-2 I am using follower force, my aim is to estimate the force required to rotate the cam by 32 degree.while other end of the cam is pivoted(Rz free). Please have a look at my model attached to link.
  13. NLOAD1 for GRAV

    Hi, I am trying to combine the load and gravity for NLGEOM case. I could not reference the GRAV in nload1 ? why so But the Help states that If a GRAV Bulk Data Entry is referenced in the EXCITEID field, the TYPE field should be set to LOAD.
  14. Non linear Transient Analysis

    Hi , I tried a simple case for nonlinear transient in Optistruct and its considering the dynamic effects as told in help I still wonder how come a nonlinear transient analysis takes dynamics(inertia / momentum) into consideration but the simple direct transient does not ? If non-linearity(Contact/ Geometric/ material ) is the difference between those two cases, how do they vary dynamically Please help me know the reason for it. Thank you
  15. Strain energy post-processing?

    Hi, Can i know the Significance of EPSD (equivalent strain rate). What its used for?
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