【摘要】 基于变密度拓扑优化方法和声-结构耦合系统有限元模型,对四角固支箱体模拟的飞机座舱进行了减振降噪分析.通过数值模拟,对结构质量和刚度特性优化配置使结构的固有频率避开激振频率,从而避免共振.通过比较优化前后结构固有频率的变化和对声压的影响,验证了拓扑优化在结构减振降噪方面的可行性和有效性.这种方法对飞机座舱减振降噪设计具有一定的参考价值.更多还原

【Abstract】 The structural topology optimization method—variable density method is used to optimize the topology of an acoustic_box for interior sound pressure reduction.A coupled acoustic_structural system is considered and modal analysis method of the coupled system is used to evaluate the interior sound pressure level.Numerical results show the method can carry out aircraft cabin noise reduction analysis effectively.The prospects of application topology optimization in other vehicles vibration and noise reduction design are also discussed.更多还原