Modal Testing Frequency Response Functions

Here is a Matlab script which calculates the H1 & H2 frequency response functions for a force and response time history pair.

modal_frf.zip

It is best suited for the case of random force excitation. It uses ensemble averaging.

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Here is a Matlab script which is suitable for the case of an impulse force and response pair:

frf_from_th.zip

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See also:

Modal Test Webpage

Half-Power Bandwidth Method

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– Tom Irvine

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