车载火箭发射系统模态分析与试验研究

为提高火箭炮的寿命及射击精度，通过试验模态分析法进行火箭炮系统模态测试。获取结构固有频率、 模态振型和阻尼比等模态参数，分析在不同胎压、支撑高度下系统的振动特性，为火箭炮结构系统的振动特性分析、 振动故障诊断和预报以及结构动力特性的优化设计提供依据。简化模态测试试验过程，将测试获得的整车模态振动 参数与有限元仿真结果对比分析。仿真结果验证了有限元分析的精确度，提高了计算模态分析的应用价值。

Modal Analysis and Experimental Study of Vehicular Rocket Launching System

In order to improve the life and firing accuracy of rocket launcher, the modal test of rocket launcher system is carried out by experimental modal analysis method. The modal parameters such as the natural frequency, modal shape and damping ratio of the structure are obtained, and the vibration characteristics of the system under different tire pressures and support heights are analyzed, which provides a basis for the vibration characteristics analysis, vibration fault diagnosis and prediction, and the optimization design of the structural dynamic characteristics of the rocket launcher structure system. The modal test process is simplified, and the modal vibration parameters obtained from the test are compared with the finite element simulation results. The simulation results verify the accuracy of the finite element analysis and improve the application value of the computational modal analysis.