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Mrt last won the day on October 27 2018

Mrt had the most liked content!

About Mrt

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  1. you can try to use radioss quasi-static. to my mind radioss is better for contact ussues;)
  2. do you want connect "node to node"? or "node to node set"?
  3. are you kidding?=) @Ekaterina needs more topics!
  4. The penalization technique used is the “power law representation of elasticity properties,” which can be expressed for any solid 3D or 2D element as follows: K(r) = K*ρ^p where K and K represent the penalized and the real stiffness matrix of an element, respectively, ρ is the density and p the penalization factor which is always greater than 1. In OptiStruct, the DISCRETE parameter corresponds to (p - 1). DISCRETE can be defined on the DOPTPRM bulk data entry. P usually takes a value between 2.0 and 4.0. For example, compared to the non-penalized formulation (which is equivalent to p=1) at ρ=0.3, p=2 reduces the stiffness of the element from 0.3 to 0.09 times the stiffness of the fully dense element. The default DISCRETE is 1.0 for shell dominant structures, and 2.0 for solids dominant structures (the dominance is defined by the proportion of number of elements)
  5. i haven't done mesh fo cfd, i haven't ever worked in acusolve. as for me the best way to try=) do cube, and do diffrent approach/mesh size.=)
  6. https://altairuniversity.com/wp-content/uploads/2015/11/Optim_Interpretation.pdf
  7. you can't use one size fo all model. as i know you should use min/max and grow rate parameters. and my question to @acuprowhy can't i use several volumes separated by wall?
  8. hello! i am not cfd specialist. you do great job! it's interesting issue. is it windshield defrost? you should make 2 volumes. first are tubes second is cabin. and the WALL should be common part for tube and cabin (mesh node to node).
  9. what solver do you use? in optistruct is possible to do tie contact automatic=) tools->contact brouser->entities field mouse right button->autocontact->property type "freeze" for tie
  10. try to solve reduced model/part of model. it's difficult to search mistake in large model.
  11. have you tried to solve part of model? Has it gone? maybe it's so large for your computer?
  12. clear all previous files in work folder (close hyperview if it is opened). check penetration.
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