用非线性模态综合法模拟某高炮的后座运动

SIMULATION FOR RECOILING MOVEMENT OF AN ANTI—AIR GUN BY NONLINEAR MODAL SYNTHESIS

本文研究火炮自动机后座动的分析问题,文中将某高炮的后座部分与缓冲机组成的结构视为非线性振动系统,应用非线性模态综合法对其进行运动模拟。其中各零部件被视为子系统,而缓冲簧和滑动等磨擦被视为子系统之间的连接。此外本文在火药气体给予后座部分的作用力的处理方面具有独特之处。本文得到的结果与实测结果相比,吻合非常好。

This paper deals with the recoiling movement of an anti—air gun. In the paper, the structure composed of recoiling mass and anti—recoil device is considered as a nonlinear system and then simulated by the nonlinear modal synthesis technique, in which the stiff mechanical parts are trested as the linear sub—systems, and the springs, frictional forces and rigid contacts as the nonlinear links between the sub—systems. The results are given, which show good agreements with those from tests. Also the force on gun frame by the anti—recoil device is calculated. And it is pointed out that the gun frame is excited not by the impulse force but by an oscillating force.