燃气射流引起的火箭发射系统振动特性分析

Analysis of Vibration of Rocket Launching System Caused by Gas Jet

以火箭发射系统为研究对象,对其56°射角工况下发射过程中的振动特性进行分析。创新点在于确定发射过程中动态载荷的加载方法,即首先根据发射系统有限元分析结果确定迎气面上试验测量点的具体位置,然后测得燃气射流冲击压强随时间变化的数值,并对试验测得数据进行处理,最后推导冲击压力对于径向距离的直线公式。所采用的冲击压强分析方法为研究其他武器系统受燃气射流冲击的影响提供了重要的指导意义。

According to the results of finite element analysis,the experimental arrangement of measuring points is determined,and values of rocket gas jet impact pressure changing over time is measured;deal with the experimental data for later process,the linear formula of the impact pressure is derived. Determined the reasonable loading method,and at a 56 degree angle condition,the vibration characteristics of dynamic model further is studied.The method of impact pressure has reference significance to innovative design the analysis of other weapon systems.