关键词: 碰撞试验, 冲击脉冲发生器, 冲击脉冲, 缓冲器

Abstract:

Based on the concept of hydraulic dissipation of kinetic energy,a novel structure of a shock pulse generator with combination of throttling by cone-shape spool and orifice was presented herein.By virtue of gap and orifice combination-throttling,the proposed structure dissipated the kinetic energy of a moving mass and decelerated it to a stop to produce desired shock pulses.By establishing motion equations of each component and analyzing the internal fluid dynamic phenomenon of the structure,the shock pulse generator was demonstrated numerically with such mechanical properties as:being able to self-adapt to the external loads applied to it;with high efficient dissipation of kinetic energy instantly;prompt and easy adjustment of the width and amplitude of shock pulses by changing the equivalent flow area of the damping orifices,which made it be applicable to different impact tests.It is suitable to use in conditions with large momentum change,especially the cases where the braking process with heavy moving loads and high speed is required to be controlled in desired way.

Key words: impact test, shock pulse generator, shock pulse, damper