As the application of composite materials increases, analysis and optimum design for various dynamic loads as well as static loads are required. In this paper, we present an optimal design study using the equivalent static load method for laminated composite structures subjected to various nonlinear dynamic loads. First, the dynamic analysis of the laminate composite structure was performed using the finite element method. Next, the equivalent static load at each time step was calculated using the calculated dynamic response, and the static response optimization of the composite structure was performed by applying the calculated equivalent static load as a multi-load condition. Then, optimal design was performed by minimizing mass or maximizing strength by designing stacking thickness and stacking angle as design variables by applying various dynamic loads for the three different composite material structures. As a result of the optimization, the results of the conventional dynamic response optimization method, the error of less than 0.1 %, and the convergence speed up to 18 times were shown, and it was verified that the convergence speed was excellent while ensuring the accuracy of the solution.

随着复合材料应用的增加，需要对各种动载荷和静载荷进行分析和优化设计。在本文中，我们使用等效静载荷法对承受各种非线性动态载荷的层压复合结构进行了优化设计研究。首先，使用有限元方法对层压复合结构进行动力分析。接下来，使用计算得到的动态响应计算每个时间步的等效静载荷，并通过将计算出的等效静载荷作为多载荷条件进行复合结构的静响应优化。然后，通过对三种不同的复合材料结构施加各种动态载荷，将堆叠厚度和堆叠角度设计为设计变量，从而通过最小化质量或最大化强度来执行优化设计。优化结果显示，常规动态响应优化方法的结果，误差小于0.1%，收敛速度高达18倍，验证了在保证精度的同时收敛速度优异的解决方案。