DEVELOPMENT AND VALIDATION OF A NEW EXPERIMENTAL METHOD TO IDENTIFY DAMPING MATRICES OF A DYNAMIC SYSTEM

As demonstrated in the authorsʹ previous work, damping matrices in the equation of motion of a dynamics system can be identified from the frequency response function matrix (FRM) of the system. A newly developed method with a much simpler algorithm is proposed in this paper for more effective damping matrices identification. Theoretical validation of the method and related noise study are conducted using a simple example, which reveals the methodʹs improved features. A set of specially designed measurements are conducted for a qualitative, experimental validation of the identification method. Important measurement issues learned from the experiment, which include needs for phase matching and FRM conditioning, are explained. Possible significant applications of the method are also discussed.