Waveform analysis of lateral impact tester with vibration and friction

摘要

The lateral impact tester is the key-device to test the naval ship devices' properties of resisting non-contact explosive impact, and used to simulate the shock response of shipboard under naval dual-wave shock. Trial device installed on the top surface, it generates a huge overturning moment on tester and subsequently leans to the one-side of the impact cylinder when the positive wave is shocking the trial device. The vibration of trial device causes the rail of tester to generate periodic positive pressure and friction. To study the effects of output waveform produced when the vibration and friction are impacting on the impact table. This paper analyzed the motion regular of the tester based on finite element method. And there is a discovery: the vibration and overturning moment of trial device itself had no effect on the impact tester displacement almost and slightly effects on velocity of impact table, but has significant effects on the acceleration of the impact table, not only make the acceleration peaks of the positive waves significantly changed, but also the negative waveform appears jaggy. The vibration and overturning moment of trial device greatly increases the friction of the rail,and the friction changed periodically with the changes of vibration of the impact tester. The experimental results of the research have the meaning to guide the design of lateral impact tester.