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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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  1. HI, Virtual Wind Tunnel (VWT) is a vertical solution to perform wind tunnel simulations of vehicles in an efficient manner. You can g through this link http://www.altairuniversity.com/analysis/cfd/virtual-wind-tunnel/ for a short demo on VWT. Also, for webinar on VWT training please visit https://www.youtube.com/watch?v=qm6hvDxjJN8 . Also, please go through this topic which is similar to your query:
  2. Hi, The corrected file has been sent to you.
  3. Hi Alessio, In such a case the workaround possible is you can make the wall rigid and make the bullet to impact on the same so that the bullet will deform. It also depends on the material properties of the bullet and the geometry. And so ensure the material values are correct.
  4. Hi Prashanth, In such a case I doubt whether it is supported in v10. You can try the same in the latest HW version. Else, you can forward me the file through the secure dropbox so that I can run and check the same.
  5. Hi Prashanth, You can manually type in this command in the engine file. In the latest version (HyperWorks 2017) we can directly input this command. Meanwhile, please upgrade HyperWorks to the latest edition,HyperWorks 2017 and you can download the same from: https://connect.altair.com/
  6. Hi Prashanth, Please input /ANIM/BRICK/BFRAC in the engine file for generating animation files for burn fraction.
  7. Hi Mohamed, You can model this using SPH method. Once the surface for the sandbag is created you can fill the same with SPH particles and can run the simulation. We have an example file on SPH model, Example-22, Ditching using SPH and recommend you to go through the same.
  8. Hi Leox, There is no direct option available to extract the geometry from 1D elements. Similarly as the option above you can also try with the drag option (2D>Drag) to create a surface and/or mesh by dragging a series of nodes or lines, or to create elements by dragging selected elements.
  9. Hi, The relation for contact force depends on the magnitude of mass of the body and the sudden change in velocity of the body, which is acceleration. If the system of objects is not accelerating, then the contact force between the bodies is just the initial force. There are many open web resources available on calculating contact forces and I request you to go through those for better understanding of this concept.
  10. Hi Gopal, For the rigid body switch ICoG to 3, run the simulation and review.
  11. Hi Gopal, In the simulation also it seems like ram is not in complete contact with the structural member. Please recheck the load applied and ensure that it is applied on all the nodes. Also please check the interface defined. You can also try defining the interface with a contact surface. If the issue persist, please share the model file through the secure dropbox so that we can review the same.
  12. Hi Mallik, Please go through these videos below which shows the steps for setting up composite analysis in OptiStruct. http://www.altairuniversity.com/analysis/structural/composites/analysis-of-a-composite-plate-video/ http://www.altairuniversity.com/analysis/structural/composites/modeling-and-analysis-of-composite-structure/ Please follow these steps and let us know if you find any difficulties.
  13. Hi, You can create an output block for the elements and the time history output include plastic strains, strain rate...etc
  14. Hi, You can input /ANIM/SHELL/TENS/STRAIN/N, where N is the layer number (eg:/ANIM/SHELL/TENS/STRAIN/1 for strain in layer 1), keyword in the engine file for extracting strain for each ply.
  15. Hi, In HyperView the contact forces are extracted for the whole model whereas in HyperGraph we are separately extracting the contact forces from the interfaces defined.