期刊名称：Scientific Journals of the Maritime University of Szczecin
印刷版ISSN：1733-8670
电子版ISSN：2392-0378
出版年度：2005
卷号：5
页码：55-64
语种：English
出版社：MUS
摘要：In the article an attempt was made to use some time–frequency methods for the analysis of acoustic emission signals.Concerning the field of interests measurements were taken of some ship machinery and equipment.Signals coming from the fuel injection systems of ship diesel engines,roll bearings and gear were analyzed.They were pre–selected in regard to their usefulness for diagnostic purposes.
其他摘要：The article discusses the upgraded friction machine with high precision testing of gears materials.The essence of the mo dernization of such friction machine is solved using in the kinematics between the drive and rollers samples of the same diameter of two pairs of eccentrically fixed gears.As a result of the mentioned kinematic connection of both rollers samples there is a smooth increase and decrease of their angular velocity in some areas while achieving the same angular velocities in the other areas.At the same time,the rolling friction occurs with a variable relative slippage in some areas of rollers samples and the rolling friction without slipping in the other areas.These friction modes provide the kinematic conditions of engagement of teeth of spur gears along the lines of their links with different signs of slippage.Accordingly,under these conditions,the accuracy of physical simulation of work of gears in drives of printing equipment significantly increases.
关键词：acoustic emission;time frequency analysis;diesel engine;gear box.
