16 January 2019 5 186 Report

I am currently studying the behaviour of a cantilever beam and I need to obtain the damping factor of each mode of the beam. Does anybody know how to do this?

I have the time-response of my beam that I have obtained with an accelerometer but in this time response all modes are together.

I need the different damping factors in order to be able to obtain the rayleigh coefficients of my beam and simulate it in Abaqus.

I have read that I can obtain these dampings factor with the bode diagram, but I dont know how to obtain bode's diagram out of my time-response graph.

Or even how to isolate one mode and that the accelerometer only registers that mode.

Thank you very much!!

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