摘要
为了研究弹载器件抗高过载机理,采用分离式霍普金森压杆(SHPB)装置和高速摄像机等测试设备,得到了测试所用弹载器件可承受的极限载荷和经减载组件减载后作用于弹载器件上的输出应力。针对减载组件在冲击条件下的变形受应力波效应和应变率效应互相耦合影响的情况,基于粘弹性材料的非线性特性,建立了加装减载组件的弹载器件非线性动力学模型。利用参数辨识法和特征线的相容关系获得了反应减载组件材料属性的性能参数并完成了模型求解,计算结果与冲击实验结果相符。该模型的建立与求解,为高过载环境下弹载器件的动态特性研究提供理论研究和方法参考。
In order to study the mechanism of projectile-borne devices against high overload,the sustainable limit load of projectile-borne device and the output stress on projectile-bornre device after load shedding are got by SHPB device and high speed camera. For the deformation of load shedding subassembly due to stress wave effect and strain rate effect coupling under shock,a nonlinear dynamic model of the projectile-borne device with load shedding subassembly is established based on the nonlinear properties of viscoelastic material. The material property of load shedding subassembly can be got by parameter identification and compatibility relationship of characteristic line,the experimental result is well consistent with the theoretical calculation. The model provides the theoretical research and method for the dynamic characteristics of projectile-borne device in high-overload environment.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2015年第10期1875-1881,共7页
Acta Armamentarii
基金
国家自然科学基金项目(11172331)
关键词
兵器科学与技术
分离式霍普金森压杆
弹载器件
非线性
动态特性
ordnance science and technology
split Hopkinson pressure bar
projectile-borne device
nonlinearity
dynamic characteristics
