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本文研究了含层间分层损伤复合材料层合板分层模型、阻尼和动力响应特征。在分层区上下子板间构造一种特定的界面连接单元 ,以防止分层处子板间的脱离或嵌入现象。为确定合理的有限元分析中的阻尼矩阵形式 ,文中进行了多种计算方式的比较 ,并做了T300/QY8911层合板梁的激振试验 ,依据耗散能等效 ,提出对阻尼矩阵构造的改良方法 ,使系统有限元动力响应分析中 ,既包含较多模态参数对结构响应的作用 ,又避免阻尼矩阵的满阵形式以利于有限元分析的计算机实施。利用时域直接积分法对稳态激励下的响应特征进行了研究 ,通过对界面连接单元刚度对动力特性影响的计算 ,给出分层受损复合材料层合板的动力响应特征 ,为含层间分层损伤层合板动力分析提供了一个有效方法,同时 ,数值模拟结果对进一步理解层间分层损伤层合板的动态特性也存在一定的参考价值
In this paper, the layered model, damping and dynamic response characteristics of layered composite laminates with interlayer damage are studied. A special interfacing unit is constructed between the upper and lower sub-slabs in the stratified zone to prevent detachment or embedding of the sub-slabs at the stratification level. In order to determine the form of damping matrix in a reasonable finite element analysis, a variety of calculation methods are compared and the exciting test of T300 / QY8911 laminated beam is done. Based on the dissipative energy equivalence, the damping matrix structure The improved method makes the dynamic finite element analysis of the system not only include the effect of more modal parameters on the structure response but also avoid the full matrix form of the damping matrix in order to facilitate the implementation of the finite element analysis computer. The response characteristics under steady-state excitation are studied by using the time-domain direct integral method. The dynamic response characteristics of laminated damaged composite laminates are given through the calculation of the influence of interface stiffness on dynamic characteristics. The dynamic analysis of delaminated laminates provides an effective method. At the same time, the numerical simulation results have some reference value for further understanding of the dynamic characteristics of delaminated laminates