反弹对撞式冲击放大器机理研究  

RESEARCH ON THE MECHANISM OF REBOUND COLLISION SHOCK AMPLIFIER

作　　者：武双双 金映丽[1] 闫明[1] 顾西平 WU Shuang-shuang;JIN Ying-li;YAN Ming;GU Xi-ping(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学机械工程学院,沈阳110870

出　　处：《工程力学》2023年第8期235-242,共8页Engineering Mechanics

基　　金：国防科技创新特区项目(20-163-00-TS-006-002-01)。

摘　　要：为了在传统跌落冲击试验台上开展强冲击试验,以获得更高的加速度峰值。采用动态接触理论与经典碰撞理论相结合的方法,考虑能量损失,引入碰撞恢复系数,建立反弹对撞式冲击放大器的运动学模型,推导了加速度及其放大倍数计算公式,研究了预留间隙、弹力绳刚度对冲击放大的影响规律。设计实验装置并进行试验,验证了理论模型的可行性和有效性。结果表明:理论计算与实验结果较吻合,最大误差约为7%;冲击放大台的最大加速度可达3780 g,加速度放大约13.5倍;存在一个理想预留间隙,使放大台加速度取得最大值,且选取较大跌落高度及理想预留间隙,更利于冲击放大;小刚度弹力绳对加速度具有一定的放大作用,但与预留间隙相比,影响较小。In order to get higher peak acceleration,strong shock test is carried out on conventional drop shock test table.Energy loss and collision coefficient are considered,the kinematic model of rebound collision shock amplifier is established by combining the dynamic contact theory with the classical collision theory,and the formulas of acceleration and its magnification factor are deduced.The influence of reserved clearance and elastic rope stiffness on shock amplification are discussed.Then,the experimental device is designed,and the feasibility of the theoretical model is verified.The results indicate that theoretical calculation is consistent with experimental results,and the maximum error is about 7%.The maximum acceleration can reach 3780 g,and the peak acceleration of the drop table is amplified by approximately 13.5 times.There is an ideal reserved gap to maximize the peak acceleration of amplifier,the larger drop height and ideal reserved gap are more conducive to shock amplification.The elastic rope with lower stiffness has a certain amplifying effect on acceleration,but its influence is small compared with the reserved gap.

关 键 词：强冲击 放大台加速度 冲击放大器 理想预留间隙 弹力绳刚度 

分 类 号：TG115.56[金属学及工艺—物理冶金]