杆的纵向冲击问题全过程分析

GENERAL PROCEDURE FOR ANALYSIS OF AXIAL RESPONSE OF PRISMATIC BAR DURING IMPACT

本文采用模态分析方法 ,分析了任意支承条件下杆的冲击动力响应。碰撞体和靶体从开始接触到开始分离前 ,把它们看成一个振动体系。根据碰撞体与靶体的接触区的内力由压力变成张力的时间确定撞击体与靶体分离的时间 ,采用分离变量法 ,分别推导了碰撞体与靶体分离前和分离后杆的冲击动力响应的解析式 ,并进行了若干算例的分析。

In the paper,the dynamic axial response of bar during impact,while the impactor and target are regarded as a system of vibration,is analyzed by means of variables separation method.In accordance with the departure time when the impactor leaves the target,the analytical solutions of response of the bar before and after the impactor departing from target are derived respectively,and several case studies are carried out in terms of these solutions.