摘要
在活性材料PTFE/Al质量配比73.5%/26.5%,受到持续时间10 ms、峰值33000 g的加速度载荷条件下,构建了一维侵彻体应力波传播模型,分析了应力波在活性材料侵彻体内传播过程,基于LS-DNYA软件对不带外壳和带外壳的冲击波载荷作用、矩形载荷作用以及超高速发射载荷作用4种情况模拟仿真。结果表明,在冲击波载荷作用下,内芯的应力峰值随距离指数衰减,衰减系数为-0.38122 cm^(-1);在矩形载荷作用下,活性材料侵彻体外壳和内芯发生二次碰撞,内芯应力突增至78 MPa后指数衰减。由于超高速发射过载的作用时间10 ms远大于应力波在侵彻体中传播所需的时间62.497μs,整体过载起主要作用。
In view of the application requirements of reactive materials in ultra-high-speed penetrators,it is of theoretical and practical significance to study the evolution process of stress waves in penetrators under ultra-high-speed emission conditions.Under the condition of PTFE/Al mass ratio of 73.5%/26.5%,acceleration load of 10 ms and peak value of 33000 g,a one-dimensional stress wave propagation model of penetrator was constructed,and the propagation process of stress wave in the penetrator of reactive material was analyzed.Based on LS-DNYA software,four cases of shock wave load without shell,shock wave load with shell,rectangular load and ultra-high speed launch load were simulated.The results show that under the action of shock wave load,the peak stress of the inner core decays exponentially with the distance,and the attenuation coefficient is-0.38122 cm^(-1);Under the action of rectangular load,the outer shell and the inner core of the active material penetrator collided twice,and the stress of the inner core suddenly increased to 78 MPa and then decayed exponentially.Because the action time of the ultra-high-speed launch overload is 10 ms,which is much longer than the time required for the propagation of the stress wave in the penetrator 62.497μs,the overall overload plays a major role.
作者
谭波
谭晟
芦永进
杨世玺
邓达
TAN Bo;TAN Sheng;LU Yongjin;YANG Shixi;DENG Da(Naval University of Engineering,Wuhan 430033,China)
出处
《兵器装备工程学报》
北大核心
2025年第S1期1-7,共7页
Journal of Ordnance Equipment Engineering
基金
海军工程大学自主立项项目(2022207150)。
