A new sensitivity analysis method of frequency response function

The sensitivity analysis of frequency response function plays a very important role in structural optimization, dynamic finite element model updating and vibration control. The conventional computation of frequency response sensitivity requires the assembled matrix of frequency response function, which costs too much work. This paper proposed a new method, which based on the construction of a pseudo excitation force, then re-calculation of frequency response function using mode superposition method. The numerical calculation shows the high accuracy of this method.