STUDY OF MECHANICAL SYSTEMS SUBJECTED TO COMBINED DETERMINISTIC AND RANDOM EXCITATION

Abstract

This paper describes the study of a mechanical system idealised by a single degree of freedom system, when subjected to combined random and deterministic excitation. The results reveal the similar features eXisting between the case under consideration and the case of a similar system subjected to pure sinusoidal excitation, which fact is explained by the assumption that the random part of the combined excitation is a narrow band process with a central frequency equal to the frequency of the deterministic part of the excitation. The analysis nas been extended to the case of a two degree of freedom system.