柔性构件多次撞击力的计算方法  

COMPUTING METHOD FOR IMPACT FORCE IN MULTIPLE-IMPACT FLEXIBLE SYSTEM

作　　者：田阿利[1] 尹晓春[1] 

机构地区：[1]南京理工大学力学与工程科学系,南京210094

出　　处：《工程力学》2008年第1期103-108,共6页Engineering Mechanics

基　　金：南京理工大学博士研究生创新培养基金

摘　　要：研究目的是精确计算多次撞击过程中的撞击力。通过研究柔性构件中的瞬态波传播理论,提出了计算多次撞击力的瞬态波效应法,避免了求解具有未知奇异载荷项的非线性方程问题。通过双柔性杆轴向多次撞击的实例分析,研究了初始撞击速度,杆长比对撞击力和撞击发生时间的影响,表明瞬态波效应法可以计算多次撞击力,并可以研究"次撞击"现象。The present study is aimed at the calculating method for the impact forces in multiple-impact flexible systems. So a method named transient wave response approach is presented to compute the multiple impact forces by use of the transient wave propagation theory. The approach can avoid solving the impact forces from the strongly nonlinear equation coupled with impact motions. The flexible system of two flexible rods with longitudinal impacts is investigated. The numerical results show that the approach can calculate the multiple-impact forces accurately. In addition, the effects of the initial impact velocity and the length ratio on multiple-impact forces are discussed, and the phenomena of ＂sub-impact＂ are observed.

关 键 词：柔性构件 碰撞 多次撞击力 瞬态应力波 瞬态波效应法 次撞击 

分 类 号：O313.4[理学—一般力学与力学基础] O347.41[理学—力学]