منهجية تحليل الإشارات الصوتية- الارتجاجية الصادرة عن المحركات البحرية

This study deals with the problem of vibro-acoustic measurement characteristic of marine diesel engines. It is noted that a solution to the problems of vibro-diagnosis of a diesel engine requires preparing an equivalent model of the machine under investigation in order to establish a relationship between the structural parameters of the engine (units or details of the engine) and the characteristics of vibro signals. It is concluded that vibrating processes in a diesel engine have a local, stationary property, whose evaluation can be made by using the function of spectral density of power in the static state. The technique used in this study is that of the transformation analog time vibro signals into frequency digital ones on the basis of algorithm of fast transformation. Finally, results of experiments and the technique of processing vibro-acousticl signals of diesel engines are submitted.