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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
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
Let me know how this helps
Hi, Thank you for your suggestions. The purpose of this analysis is to evaluate the drop impact and pressure resistance of a self-standing pouch made of plastic films. As a first step, we are performing an inflation analysis of the pouch before conducting the drop impact and pressure tests. The pouch is filled with water in the actual test. Therefore, we would like to stop the inflation analysis based on the following conditions: The opening angle of the bottom gusset reaches a specified value. The volume of water inside the pouch reaches a specified value. For the pressure resistance analysis in particular, we would like to make the water volume equal to the internal volume of the pouch, so that the pouch is completely filled without any air space.
Regarding sensor based on an angle, we already saw how it could be implemented: the best approach would be to use /SENSOR/PYTHON.
Regarding sensor based on the volume of a monitored volume:
These are enhancements that might be pushed to development team.
I dont know what type of monitored volume you are using and how you defined the flow of water in this monitored volume. Yet, assuming the fluid is incompressible, you could define the mass flow rate and put it to 0 once you reached the target volume.
