Hello all,
I am trying to model a time-dependent vibration problem (resonant vibration) with contact and I am having trouble solving the model. The contact is between the shaker and the object. I want to apply a prescribed displacement at the tip of the shaker and also to avoid the shaker penetrating the object. I saw a couple of posts discussing about contact in transient problems in the forum.
www.comsol.com/community/forums/general/thread/71/
www.comsol.com/community/forums/general/thread/30262/
where the advice was primarily to avoid augmented lagrangian method and solve using pure penalty method. I am running 4.3a and these settings seem obsolete now? The comsol structural mechanics manual suggests that "as long as inertial effects are negligible, it is possible to apply contact for time-dependent problems". In my case, I guess inertial effects are indeed important since it is a resonant excitation.
Can someone suggest how I can approach my situation? Also, when I modeled the same set up for a stationary analysis with constant prescribed displacement, the model works fine. It doesnt work for time-dependent analysis.
Thanks
Jyani
I am trying to model a time-dependent vibration problem (resonant vibration) with contact and I am having trouble solving the model. The contact is between the shaker and the object. I want to apply a prescribed displacement at the tip of the shaker and also to avoid the shaker penetrating the object. I saw a couple of posts discussing about contact in transient problems in the forum.
www.comsol.com/community/forums/general/thread/71/
www.comsol.com/community/forums/general/thread/30262/
where the advice was primarily to avoid augmented lagrangian method and solve using pure penalty method. I am running 4.3a and these settings seem obsolete now? The comsol structural mechanics manual suggests that "as long as inertial effects are negligible, it is possible to apply contact for time-dependent problems". In my case, I guess inertial effects are indeed important since it is a resonant excitation.
Can someone suggest how I can approach my situation? Also, when I modeled the same set up for a stationary analysis with constant prescribed displacement, the model works fine. It doesnt work for time-dependent analysis.
Thanks
Jyani