Abstract: A new method that can apply DDAM to nonlinear stiffness system is put forward in the paper, an equivalent linear stiffness model with displacement restrictor is constructed, and the optimal scheme is designed. Pareto setting is obtained by finite element method and genetic algorithm, this pareto setting would be an excellent reference for engineering application. This design mode would assure excellent vibration and shock isolation at the same time, that is significative for vibration and shock isolation of onboard settings.

Key words: vibration and shock isolation, linearized DDAM, piecewise linear stiffness system, optimal design

摘要： 提出了可应用于非线性系统冲击计算的DDAM改进方法，建立了附加弹性限位器的动力系统隔振抗冲击等效线性模型，设计了隔振抗冲击的优化框图，利用有限元法及遗传算法优化设计得到了pareto最优解集，根据该最优解集可选择有利于工程应用的隔振抗冲击优化方案，由参数反演得到系统的优化设计参数。该设计思路可以在保持良好隔振效果的同时，提高舰艇设备的抗冲击性能，对舰艇隔振抗冲设计具有较好的参考价值。

关键词: 隔振抗冲击, 线性化DDAM, 刚度分段线性, 优化设计