固体发动机点火低频冲击环境预示

Low-Frequency Shock Simulation of Solid Rocket Motor Ignition

固体发动机在点火过程中,存在两种冲击环境:由点火火工品工作引起的高频冲击环境(峰值频率在几百到几千赫兹)和火工品工作后几十毫秒发生的低频冲击环境(峰值频率在几十到上百赫兹)。本文的研究针对后者,即低频冲击环境开展,从该环境产生的过程、环境特点以及低频冲击环境预示等方面开展了相关分析工作。经分析,该环境与发动机堵片打开时序相关,存在频率低、响应大和发生远场传递等特点,预示结果可以为制定发动机点火低频冲击环境条件提供依据。

There are two kinds of shock environment in solid motor ignition process: high-frequency shock environment because of the ignition device’s working and low-frequency shock which happens dozens micro-seconds after ignition. Low-frequency shock environment is the main object of this analysis. This analysis contains mechanism research and simulation. This shock environment happens when the nozzle closure is opening,and has the feature of low frequency, high response and far field influence. The simulation result can be used as the basis of low-frequency shock condition design.