基于FEM的各向异性复合材料阻尼仿真分析

Damping Simulation Analysis of Orthotropic Composite Materials by FEM

研究如何应用有限元法分析各向异性复合材料层压结构的阻尼性能,因为传统的复合材料阻尼分析方法存在一定的局限性。首先引入阻尼分析的能量法理论,推导出叠层结构的应变能函数;然后,引入阻尼与能量消耗的关系,获得应力函数的应变能表达,并利用有限元法对其进行扩展运算;最后,用这种理论针对几种不同的复合材料层压结构进行了阻尼仿真计算。对比试验方法获得的数据与理论仿真数据良好吻合。说明这种理论仿真分析方法可信,为复杂结构形状的阻尼分析提供依据。

The damping property of anisotropic composite laminate is studied by using finite element method because of the limitations in the traditional methods.Firstly the energy method of damping analysis is introduced and the strain function of laminates is deduced.Then the strain energy as a function of the strain field is obtained by the relationship between damping and energy consumption,and the extended operation is carried out by finite element method.Finally this theory is used to simulate the damping of several kinds of composite laminated structures.The results of finite element method are well matched with the experimental results.It proved that the method is valid.This method can provide the basis for the damping analysis of complex structure.