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为优化复合材料层压板的冲击损伤阻抗,提出了基于实体-壳耦合模型的优化方法。模型以实体单元模拟冲击点区域,以壳单元模拟周围区域,采用耦合约束连接实体与壳,引用渐进损伤材料本构,提出了冲击下与纤维方向种数相关的损伤变量,优化过程利用遗传算法。通过算例对冲击阻抗的优化方法进行了验证,并对复合材料盒段壁板进行了铺层优化。结果表明:基于实体-壳耦合模型的遗传优化方法,计算效率高,收敛速度快,提高了层压板的抗冲击性能。
In order to optimize the impact damage resistance of composite laminates, an optimization method based on a solid-shell coupled model is proposed. The model simulates the impact point region with solid elements, simulates the surrounding region with shell elements, connects the entity with the shell using the coupling constraint, and references the asymptotic damage material constitutive model. The damage variables related to the number of fibers in the impact direction are proposed. The optimization process uses genetic algorithm . An example is given to verify the optimization of the impact impedance and to optimize the ply wall of the composite box section. The results show that the genetic optimization method based on the solid-shell coupling model has high computational efficiency and fast convergence, and improves the impact resistance of the laminate.