A New Model Updating Method for Quadratic Eigenvalue Problems.

In this paper, we consider two finite element model updating problem which incorporate the measured modal data into the analytical finite element model, producing an adjusted model on the damping and stiffness, that closely match the experimental modal data. We develop an efficient numerical algorithm for solving this problem. The new algorithm is direct methods which require O(nk²) flops. Here n is the dimension of the coefficient matrices defining the analytical model and k is the number of measured eigenpairs. [ABSTRACT FROM AUTHOR]