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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. 
    • Rahul Ponginan

      ユーザーフォーラムについて   10/22/17

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Prakash Pagadala

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About Prakash Pagadala

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  1. Error in NLSTAT Analysis of Gasket Materials

    Hi @Arul Can you share a screenshot of MGASK material card?
  2. Error in Transient Heat Transfer analysis

    @Nachiket Kadu Glad the problem is solved. It maybe because the RBE3 is constrained or some other issue with RBE3
  3. Geo nonlinear (Implicit dynamic)

    karthik, For Implicit static general Newark method is used where Mass and damping are omtted (K*DeltaU= P) but for implicit dynamic an extension of Newark method Alpha-HHT (Huges, Hibler and Taylor) is used. It allows for effective algorithmic damping of high-frequency spurious vibrations.
  4. Error in Transient Heat Transfer analysis

    @Nachiket Kadu Did you constrain the RBE3 by any chance?
  5. Error in Transient Heat Transfer analysis

    Hi, Could you please check the following: 1. The constraints applied on the rigid elements. Please check the dofs. 2. Check if there free 1Ds in your model through the Check elems panel in Tools page. 3. If you have any beam spiders, please change them to RBE2 elements and having a beam element connecting the independent nodes of spider.
  6. Geo nonlinear (Implicit dynamic)

    Hi karthik, Please read my previous reply where it states that NLSTAT ignores inertia and mass effects.
  7. Non linear Transient Analysis

    Hi Karthik, Right now I can't get the integration scheme but all I can say if you have observed we are coupling transient Dynamic and non linear where large displacements are involved.
  8. Error #1000, found blank

    Hi Eric, You can translate the component. Use Shift+F4 to translate the component
  9. Dynamic analysis

    Hi @Mahantesh Please refer to the tutorials shown in image below:
  10. NVH

    Hi Manoj, You can refer to OptiStruct help for information on NVH using OptiStruct. OptiStruct comes with a exclusive NVH directory to setup model easily for NVH related analysis. You can learn more about the from the same as well. You can also refer to tutorials related to NVH for example Transfer path analaysis.
  11. Converting shell elements to solids

    Hi @Vol7age For solid elements you need PSOLID property and for orthotropic material you can use either MAt9 or MAT9ORT
  12. NLOAD1 for GRAV

    Karthik, As I said earlier, there is an issue with load conversion. I cannot see the load/enforced load in the RAD files. This is happening while converting in the back ground. So did you use NLSTAT (LGDISP) with follower load?
  13. Error 14: Missing Mat # 3

    @s.selvarajoo No contacts will not be set automatically. You need to takecare of the contacts or nodal connectivity
  14. Geo nonlinear (Implicit dynamic)

    Hi Karthik, The primary difference between NLSTAT and NLTRAN analysis is: in the case of the NLSTAT (Non linear quasi static), it is assumed that the simulated physical phenomenon is not influenced by temporal aspects, in other words that the expected results do not depend on the speed of application of efforts. This makes it possible to satisfy the equation of equilibrium with each step, the effects of inertia being ignored. Therefore, the weakly dynamic problem can be solved as a static (quasi-static) problem. Quasi-static analysis can be performed in both small and large deformations, and nonlinearities can come from these large deformations, contact or materials.
  15. How to plot FRF from modal analysis in optistruct

    Hi @Omkar 94 Please refer to OS-T: 1305 Modal Frequency Response Analysis of a Flat Plate tutorial.
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