I would like to run a dynamic implicit analysis to simulate rotation of a rotor. The mass distribution is not equal around the rotation axis thereforethe rotor should 'touch' the rigid surface. So far I use a surface-tosurface contact (Standart), Mastersurface is of cause the rigid body. The contact tracking is a single configuration (state). Adjust to remove overclosure and smooth 3D geometry is toggled on. The interaction property is only a "hard" contact.
The rigid surface the rotor touches is connected to the surrounding by a spring element with a high stiffness so that a contact is expected.
In a general static step the described configuration works just fine and shows all expected behaviour allthough there are unconnected regions in the model.
Has someone an idea how to initialize the contact of solid elements to rigid surfaces for a dynamic implicit analysis?
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Good luck
Frank
Don't forget to tick "Allow separation after contact". However, quite when ticked, computations abort due to too stiff conditions at the interface. In such situations (if you work in Implicit) try an option in Step - Other - Unsymmetric, or move to Explicit
Thank you for your suggestions Mr Kuznetsov. I have been working on the model. I allowed separation after contact before (otherwise it would show the behaviour I wanted). I solved my problem by using Contact Contols + Contact Initialization + Contact Stabilization allthough so far I use the default data. My model now shows realistic behaviour. Further I will read about the suggestion to use Unsymmetric Matrix storage and evaluate it for my model.
Try to use automatic stabilization in the step and contact control in the interaction properties module
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