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Create Frequency response function (nonlinear backbone curves) with transient simulation
Posted 21 ago 2018, 16:17 GMT-4 Structural & Acoustics, Studies & Solvers, Structural Mechanics Version 5.3 0 Replies
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Hi,
I want to achieve the following:
Large deflection (geometric nonlinear) transient analysis of a prestressed (pretensioned) clamped-clamped beam.
(input acceleration) Apply body acceleration (user defined function acc = Asin(2piftime) [m/s^2] to the entire body. Where A [m/s^2] is amplitude and f[Hz] is the frequency and both sweeping parameters which are to be swept over defined range.
Get displacement vs time data at the center length, center width of the clamped-clamped beam (output displacement) and save to a unique file and move repeat from steps 2 to 3.
Is it possible to perform these steps in COMSOL? If yes, can anyone point me towards some examples or help me with it?
P.S. I would then post process the displacement vs time data files in MATLAB and generate the FRF plot calculated as RMS(output displacement)/RMS(input acceleration) vs f to get the nonlinear backbone curves.
-------------------P.C.
Hello punnagNCSU
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