Difference among True Status, Force Sticking and Force Bonded contact status in prestressed modal analysis
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January 25, 2023 at 7:34 amFAQParticipant
The Linear Perturbation method allows you to define what contact status from your static analysis you want to use. So, for example if you define a nonlinear type of contact in your static analysis, you can select how you want that status to translate into the modal analysis. In the prestress settings for the modal you can choose to use the “True Status” from the static – which would take in account sliding, sticking, etc. You could choose “Force Sticking” which would force any contact regions that were sliding to become to a sticking status for the modal. Lastly, you can specify “Force Bonded”, by doing this, it will bond all the contact regions that were sliding or sticking. This is a good example from the help that shows how you can select a certain contact status for the modal and how it will affect the frequencies and mode shapes: Mechanical Tutorials: Chapter3: Cyclic Symmetry Analysis of a Rotor-Brake Assembly
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