复合材料层合板阻尼特性有限元数值模拟

Numerical Simulation on the Damping Characteristic of Laminated Composite Plates by the Finite Element Method

应用耗散能原理建立了复合材料层合板的阻尼预测分析模型,对复合材料层合板进行三维有限元模态分析,求出各个模态下的应力、应变分量。根据模态分析结果,从单向复合材料的阻尼性能参数出发,利用层合板应变能、耗散能和结构模态阻尼的关系求出各个模态对应的模态阻尼损耗因子。利用该方法,分别计算了单向层合板和对称层合板的结构模态阻尼损耗因子。数值计算结果与已有的理论分析和试验结果相比吻合较好,从而验证了该方法的合理性,该方法还可以比较三维应力分量对阻尼的贡献。

The damping prediction analysis model of composite laminated plates is presented based on the dissipation energy principle, and the stress and strain components of the composite laminates are obtained by three dimensional finite element modal analysis. Based on the modal analysis results, starting from the damping performance parameters of unidirectional composite lami-nates, the modal damping loss factor corresponding to each mode is calculated which use of laminated strain energy, energy dissi-pation and structural modal damping relations. The presented method is validated by the calculations for structural damping of uni-directional laminates and symmetrical laminates. The results for the vibration and damping analysis of laminated plates obtained by the present method are compared with the results obtained by other authors to verify the reasonability of the present method. Con-tributions of 3-D stress components to damping can also be studied by this method.