摘要
导弹自身的火箭发动机会产生除轴向推力之外的横向随机激励,此随机激励作用于导弹是平稳随机过程。研究导弹各部分结构的随机响应,可以利用MSC Nastran有限元分析软件做随机响应仿真实验得到各个部分测点的响应谱和加速度均方根值。根据这种典型的输入输出过程,对导弹局部结构的模态参数进行主动控制,使其响应结果满足技术要求,为导弹设计和试验提供参考。
This paper establishes the finite element model of multi-cabin missile and regards the flight state of the missile as unconstrained and multiple degree of freedom system. Missile rocket engine will produce the transverse random excitation besides axial thrust. It is a stationary random process that the random excitation affects the missile. In order to study the random response of each part of structure, the acceleration response spectrum and root-mean-square of different measurement points will be obtained by using finite element analysis software MSC Nastran to do random response simulation. For this typical input and output process, there are active control methods to control modal parameters of local structure. At last, the response results could meet the technical requirements, and provide reference for the missile design and testing.
出处
《导弹与航天运载技术》
北大核心
2014年第1期61-64,共4页
Missiles and Space Vehicles
基金
国家杰出青年科学基金(10725209)
上海市重点学科建设项目(S30106)
关键词
导弹
随机响应
有限元
模态参数
Missile
Random response
Finite element
Modal parameters
