measure of the similarity between an analytical and experimental frequency response function
NOTE 1 The frequency response assurance criterion is a degree of freedom correlation tool. It is the FRF equivalent to the CoMAC (see 3.2.7).
NOTE 2 The frequency response assurance criterion is defined as
AHjk(w) is the analytical frequency response function of a response at DOF j due to an excitation at DOF k
XHjk(w) is the corresponding experimental frequency response function.
NOTE 3 FRAC = 1 indicates a perfect correlation of the two frequency response functions
NOTE 4 FRAC = 0 indicates a non correlation of the two frequency response functions
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