RANDOM VIBRATION ANALYSIS OF A NONLINEAR SYSTEM USING THE VOLTERRA SERIES

摘要

The Frequency Response Function (FRF) of a nonlinear system under white Gaussian excitation is computed up to O(P{sup}2) in the power spectral density of the input P. The FRF qualitatively shows the expected shifts in resonant frequency and supports the observed fact that FRFs from random excitation are returned as linear system FRFs by the Hilber transform test.