SwimBikeRun4342
Mechanical
- Mar 6, 2013
- 28
Hello
A weird problem has emerged in my model. In short, my model consists of essentially 2 hollow bars (composed of shell elements) falling to the ground. The simulation behaves as expected, until I changed the material damping.
I decided to change the material damping (specifically alpha and beta in the material definition). They were originally set to relatively low values with respect to my model. But once I changed beta to a higher value (around 1E-3) the bars cease to fall to the ground and just remain fixed in space despite gravity being applied to the entire model.
I'm pretty baffled by this. Clearly I am misunderstanding something. The only variables I change in my sim. are alpha and beta (proportional damping coefficients). And once beta becomes larger, the bars cease to fall to the ground.
Can anyone tell my what I'm doing wrong?
Thanks
Note: I am using mass scaling in this simulation, but I'm told that mass scaling does not effect gravity so it should not be relevant to this problem.
A weird problem has emerged in my model. In short, my model consists of essentially 2 hollow bars (composed of shell elements) falling to the ground. The simulation behaves as expected, until I changed the material damping.
I decided to change the material damping (specifically alpha and beta in the material definition). They were originally set to relatively low values with respect to my model. But once I changed beta to a higher value (around 1E-3) the bars cease to fall to the ground and just remain fixed in space despite gravity being applied to the entire model.
I'm pretty baffled by this. Clearly I am misunderstanding something. The only variables I change in my sim. are alpha and beta (proportional damping coefficients). And once beta becomes larger, the bars cease to fall to the ground.
Can anyone tell my what I'm doing wrong?
Thanks
Note: I am using mass scaling in this simulation, but I'm told that mass scaling does not effect gravity so it should not be relevant to this problem.
