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Nonlinear Dynamic Response of a Clamped-Clamped Euler-Bernoulli Beam

Posted 21 mars 2016, 00:49 UTC−4 Studies & Solvers, Structural Mechanics 0 Replies

Friday
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I am currently modelling the nonlinear time response of a clamped-clamped Euler-Bernoulli beam using the geometric nonlinearity tool in COMSOL. I intend on doing so for a wide frequency range in order to show the dynamic hardening response of the beam. Currently, I am having some problems with the quality of my solution and the physical interpretation.

From this link, wiki.csiamerica.com/display/kb/Damping+coefficients, and my understanding of Rayleigh Damping parameters, I believe that the damping values used for my COMSOL simulation plays a big role with the accuracy of my solution.

My main question are:
How can I accurately represent viscous damping with the Rayleigh mass and stiffness damping parameters for a wide range of frequency values?
How does the solver method affect the accuracy and speed of geometric nonlinear problems on COMSOL?

Thanks in advance,
--
FA
0 Replies Last Post 21 mars 2016, 00:49 UTC−4
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