Fast Computation Of Stationary/Non-Stationary Random Responses Of Complex Structures

Abstract

This chapter illustrates the usage of pseudo excitation method (PEM) for analyzing structural/non-stationary random responses. The PEM is efficient and easy to implement on computers because stationary random response analyses are replaced by harmonic response analyses, while evolutionary non-stationary random response analysis are replaced by step-by-step integration computations, causing the computation processes to be simplified. It is accurate because both the cross-modal and cross-excitation terms are included. Its efficiency is much higher than the traditional methods; therefore, complex engineering structures with thousands of degrees of freedom subjected to dozens of fully or partially coherent stationary/non-stationary excitations can be computed easily on ordinary personal computers.