液体火箭发动机冲击响应谱分析计算方法

Analysis of Shock Response Spectrum for Liquid Rocket Engines

基于Matlab软件包,对液体火箭发动机地面试验时的冲击信号进行了冲击响应谱计算软件的开发.利用改进递归滤波器方法分析单自由度二阶系统冲击响应谱计算原理,对软件的编制、程序验证以及地面试验数据处理进行了介绍.编制的软件可快速、方便的进行液体火箭发动机冲击响应谱分析,为地面试验数据的深入分析提供了辅助手段.

A program based on the Matlab software is presented to analyze the shock response spectrum （SRS） of liquid rocket engines from the ground test data. The theory of SRS analysis for the single-degree-freedom vibration system is introduced using the improved recursive filter method. The programming procedure and application of the program are described in details. After the validation of the program by comparison between the results from it and that from the commercial software, it is utilized to calculate the SRS of the liquid rocket engine from the ground test data. Results show that the program is convenient and efficient for the SRS analysis.