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Error runing LS-DYNA explosion model, NEED HELP ?
Thu, 2008-10-02 10:43 - aaj
Hello There
I as a student of master of structural engineering, try to do a project on simulating the effect of explosion on the concrete by using LS-DYNA as the hydrocode.
I've a problem running my model, that is an error by means of insufficient memory (about 900,000,000 words short), and I'm not able to increase it beyond 300,000,000. Then if there is anything that could help I'll be very appreciated if you could announce.
Looking forward your comment?
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Solution
Dear aaj
please leave your e_mail address,I will send for you a key word file about detonation,i did this project befor.
Solution
Dear Reza
I'm also starting to work with Ls-Dyna and blast-wave absorption. Can you also send me the
example that you've mencioned that you work with before.
Thank you
Best Regards
Joana
impact and blast
I am doing my masters on LS-Dyna and AUTODYN for impact and blast. Can you send me an materials that can help me. Thanks for you cooperation.
shmsh@aucegypt.edu
More questions...
I have just started to work with tutorials about ls-dyna for my msc degree. The goal would be to analyze how blast pressure takes shape in urban environment. How it reflects between walls etc.
I found a useful tutorial pack here: http://www.dynaexamples.com/ale/explosion , and tried to apply the same procedure in my problem but without success…
My questions are:
- If you apply JWL eos and MAT_HIGH_EXPLOSIVE_BURN material is the amount of energy depends only on the volume? So should I make the “bomb” part accurately in the size that comes from the bomb’s material density and weight?
- I tried to give hourglass stabilization for the model, but after the first few timesteps the simulation goes mad, and result shows typical hourglass effects.
- If you have a minute to check tutorial files above you will see that all the nodes have TC and RC constrains. I did not find the way how to edit this constrains in group. Do we have to edit each node’s TC and RC one by one? (I am using lsprepost for preprocessing). Is the Single Point Constrain (FEM->Model and Part->Create entity->Boundary->Spc) gives the same affect as TC and RC?
Maybe you can see that I am a newbie… I would really appreciate to have instructions and/or keyword files.
Thank you very much,
Balázs
help
Hi. I need some help because in my model there are several errors and it doesen't run. If you can send me the keyword that you are talkin about, i'll appreciate a lot!!
thanks
keyword file
@ Reza
I am trying to simulate blasting in ls dyna, could you send me the keyword file?
Thanks in advance