随机有限元法在导弹模态分析中的应用

摘要

Base on the stochastic finite element method, the modal analysis of missile was researched in this paper. The finite element modal of missile was built by APDL language of ANSYS to form the analysis file which contained complete circle simulation process. Research of reliability analysis was studied with the Monte Carlo method, and taking into account the variability of material parameter. The results indicate that the model has nice convergence, high efficiency, and enough precision. The model is valuable for applying to the modal analysis and design of missile.%以随机有限元法为依托，以导弹为研究对象进行模态分析。利用ANSYS软件的APDL语言构建导弹有限元模型，形成包含完整仿真循环过程的分析文件。采用ANSYS软件的PDS模块中的拉丁超立方蒙特卡罗抽样法，考虑导弹壳体和连接端面材料特性参数的变异性，进行可靠度分析。结果表明，导弹随机有限元模态分析的模拟收敛性良好，计算精度满足工程要求，在导弹模态分析和结构动特性设计中具有一定的应用价值。