Frequency Response Function- fundamentals

[svishal03]

I undestand the following concerning the frequency response function;

Frequency response function is a fundamental measurement that isolates the dynamic properties of a mechanical structure.

It describes the input output relation between two points of a structure as a function of frequency. Frequency response function is defined between a single input degree of freedom and a single output degree of freedom.
Frequency response function is a measure of how much displacement, velocity or acceleration response a structure has at an output degree of freedom per unit of excitation force at an input DOF.
Frequency response function is defined as a ratio of Fourier transform of an output response divided by the Fourier transform of the input force.

Now;

The inverse of Frequency response can have a name as:
Compliance <-> (displacement/force)

My questions are;
1) Can anyone provide more insight into FRF (Frequency repsonse function)? Its significance?
2) Also, what is the significance of the inverse of frequency response - Compliance?

Please help

Vishal

 

[Naty1]

start here:

http://en.wikipedia.org/wiki/Frequency_response_function