长杆弹侵彻半无限厚土的旋转效应分析  

Revolution effect analysis of a long rod penetrating into soil

作　　者：赵子龙[1] 张瑾瑾[1] 黄晓琼[1] 

机构地区：[1]太原科技大学应用科学学院,太原030024

出　　处：《振动与冲击》2010年第4期9-11,共3页Journal of Vibration and Shock

基　　金：太原科技大学博士科研启动基金资助项目(项目号200614)

摘　　要：利用刚流撞击模型以及土壤介质变形沿合力方向假设,建立了微元合力与介质移动速度之间的关系。在此基础上,建立了长杆弹侵彻土壤时考虑旋转效应的动力学方程。由这些非线性动力学方程的数值解,确定了撞击力和侵入位移。计算结果表明,随着初始角速度的增大,侵入位移的幅值明显增大。By using the rigid-fluid impact model and the hypothesis that soil deformation expands along the resultant force direction,the relation between the resultant force of an infinitesimal of a rod and the velocity of an soil infinitesimal was established.On this basis,the dynamic equations of the rod considering revolution effect were established when half-infinite soil was penetrated by a long rod.The impact force time history curves and the penetration displacement time history curves were determined by using the numerical integration of the nonlinear equations.It was shown that with increase in initial angular velocity,the penetration displacement amplitudes increase obviously.

关 键 词：长杆弹 侵彻 土壤 旋转效应 

分 类 号：O347.1[理学—固体力学]