Substructure Analysis of Complex Structure with Weak Connectors Using Matrix Perturbation

Abstract

This paper deals with the modal analysis of complex structure systems with weak connectors by means of matrix perturbation. A complex structure is divided into a number of uncoupled substructures by disconnecting the weak connectors between them, and then the complex structure is regarded as a perturbed structural system deriving from the uncoupled substructures system. Therefore, the eigensolutions of the complex structure can be obtained from the eigensolutions of the uncoupled substructures using the matrix perturbation technique. Two examples are included to illustrate and verify the validity of the procedure.