Crash model won't move

Altair Forum User

Hello,

my crash modell isn`t running properly. Everytime I start computation, there are no failures, but in the results my modell isn`t driving against the wall. It is only standing there while the tire is inflating.

Has anyone a quick answer for that problem?

Thanks in advance.

Altair Forum User

Hi DonSen,

Please ensure that the initial velocity is provided properly. Ensure that master node of rigid bodies are also selected for applying the initial velocity, if Rbody is present in the model.

If problems still persist, please share your model in the dropbox.

Altair Forum User

Hi George,

I checked the velocity many times and the master nodes of rigid bodies are also selected, but it won`t work.

I uploaded the files to the dropbox.

Altair Forum User

Hi DonSen,

Which is the unit system you have followed for this model?

Altair Forum User

Hi,

I uesed the system mm-kg-ms. So the velocity was actually 45 km/h = 12.5 mm/ms.

Altair Forum User

Hi DonSen,

Please check the monitored volume created.The defined surface for monitored volume must be closed. 

 

Altair Forum User

Isn`t the rim closing the surface of the monitored volume? It doesn`t give any errors with that.

Altair Forum User

Radioss starter gave a warning about the monitored volume. Can you recreate the monitored volume in the model?

Unable to find an attachment - read this blog

Altair Forum User

I even tried with version 14 now and recreated the monitored volume but it still won`t work.

Altair Forum User

Hi DonSen,

Can you check the model attached?. 

 

Unable to find an attachment - read this blog

Altair Forum User

Now it worked. All I had to do was change Istf to 4 and Igap to 2? Many thanks for helping me out!