In most cases, not only the eigenfrequencies but also the eigenmodes are complex-valued when damping is involved. This is automatic, so you do not need to add any special settings in the solver.Įigenfrequencies in a model without (upper table) and with (lower table) damping. As long as there are any dissipative effects in your model, these will be taken into account, and the computed eigenfrequencies will be complex-valued. Eigenfrequency AnalysisĪn eigenfrequency problem can be solved with or without damping in COMSOL Multiphysics. When performing a structural dynamics analysis, modeling the damping can be an important, and difficult, part of the task.Ī transient analysis of a vibroacoustic micromirror, with viscous and thermal damping taken into account.īelow, you’ll find an overview of what to take into consideration when modeling damping effects in your finite element analyses with the COMSOL Multiphysics® software. How to Consider Damping in Finite Element Analysis Today, we follow up by looking at how to actually include damping in finite element models. In a previous blog post, we introduced various physical phenomena that cause damping in structures and showed how such damping can be represented mathematically.
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