球形压力容器超高速撞击应力波传播特性研究  

Research on Stress Wave Propagation Characteristics of Gas-filled Spherical Pressure Vessel under Hypervelocity Impact

作　　者：才源[1] 庞宝君[1] 曲鑫 迟润强[1] CAI Yuan;PANG Baojun;QU Xin;CHI Runqiang(School of Aeronautics,Harbin Institute of Technology,Harbin 150080,China;Beijing Institute of Electronic System Engineering,Beijing 100052,China)

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150080 [2]北京电子工程总体研究所,北京100052

出　　处：《热加工工艺》2021年第4期25-28,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(11772113);国家自然科学基金资助项目(11672097)。

摘　　要：应用二级轻气炮系统发射球形铝合金弹丸超高速正撞击球形充气压力容器,采用PVDF压电传感器对容器壁表面应力波所引起的压力进行采集,获得了不同弹丸撞击速度下球形压力容器器壁表面应力波所引起的压力随弹丸撞击速度和传播距离的变化规律。结果表明,由于球形压力容器的几何结构和撞击能量向球形压力容器内高压气体传递的原因,器壁表面应力波所引起的压力随传播距离的增加呈现先减弱再略增加的规律;弹丸撞击速度的增加导致了撞击能量的增加,相同位置处器壁表面应力波所引起的压力增加。A two-stage light gas gun was used to launch a spherical aluminum alloy projectile into a gas-filled spherical pressure vessel. The PVDF piezoelectric sensor was used to collect the pressure caused by stress wave at the wall of the spherical pressure vessel, and the change rule of the stress wave pressure at the wall of the spherical pressure vessel with the projectile impact velocity and the propagation distance were obtained. The results show that due to the geometry of the spherical pressure vessel and the transfer of the impact energy to the high pressure gas in the spherical pressure vessel, the pressure caused by the stress wave at the vessel wall decreases first and then increases slightly with the increase of the propagation distance;the increase of the projectile impact velocity results in the increase of the impact energy and the pressure caused by the stress wave increases at the vessel wall in the same position.

关 键 词：超高速撞击 球形充气压力容器 聚偏氟乙烯 应力波 

分 类 号：TG115.56[金属学及工艺—物理冶金]