航天某薄壳结构有限元法减振设计及验证

The Finite Element Method for Isolator Design and Test Verification of a Thin Shell Structure of Space Products

为了提高航天产品的抗振动环境能力,有必要对产品进行减振设计。用有限元分析法对航天某薄壳结构进行动态特性分析,进而进行减振器动态特性设计,并通过试验进行设计验证。根据产品特点及减振要求给定减振器基本结构形式,根据基本理论计算确定减振器初始参数,建立产品和减振器有限元模型,用仿真的方法进行减振器动态特性设计、结构尺寸优化,用振动台试验的方法对设计进行验证。试验结果表明,所设计的减振器实现了三个方向的减振,达到了减振目标要求,所采用的有限元分析方法是有效的。

To improve the anti- vibration environmental ability of space products, the vibration reduction design is studied. An isolator design method is studied by using computer simulation and experiment methods. The isolator form is given according to the basic features and damping requirement of a thin shell structure of the space products. The initial parameters of the isolator are determined according to the basic theoretical calculation. The finite element models of the shell structure and the isolator are established, the simulation method is used to optimize the structural size of the isolator and the vibration test is used to verify the design. The test results show that the designed isolator can realize the vibration reduction in three independent directions and the methods of finite element simulation and experiment verification are effective.