角度やエアバッグの体積によるEngineの停止

ryT

Description:

Radiossで、角度やエアバッグの体積が指定値以上になった場合に解析を停止することは可能でしょうか？

センサーによる解析停止キーワードとして/STOP/LSENSORがありますが、

調べても角度やエアバッグの体積の/SENSORがないようで、

ユーザー定義センサーやユーザーサブルーチンなどを使用すれば可能でしょうか？

Product/Topic Name : Radioss 2026

 

PierreChristophe_Altair

Hi,

I hope you will be comfortable that I am replying in English.

May I first ask you why you would need such feature?
I understood that you want to stop the simulation when your airbag is expending excessively. Is this expansion due to the application (physical case) or is it due to the airbag setting (numerical)?

Then, you are correct there is no sensor to directly monitor angle or airbag quantities such as volume, pressure, etc.

What you could use is /SENSOR/PYTHON using 3 nodes to define and compute the angle.
This approach could also be implemented using user sensor (but it is a bit more complex as it is requiring fortran compilation, use of dynamic library, etc).

Another workaround would be to

1. Define a fake surface (meshed plane)
2. Add a contact interface between this surface and your airbag
3. Define a /SENSOR/INTER which will activate as soon as contact will be detected
4. Define /STOP/LSENSOR referring to this /SENSOR/INTER

Let me know how this helps