基于局部模态特征结构修正的变速箱振动控制

针对齿轮箱结构设计中经常存在的局部模态不满足振动特性要求,需要快速而准确地获得控制振动所需结构的难题,提出了一种基于局部模态特征控制的齿轮箱结构优化方法,即:根据结构设计中出现的模态特征,基于局部模态频率与拓扑优化等的耦合分析,获得局部结构的模态控制与优化.仿真与实验结果表明:新方法能够快速有效的控制齿轮箱振动特性,为齿轮箱减振及结构优化设计提供了一条新的途径.

Vibration control of gearbox based on structure modification of local mode characteristics

During the initial design process of a gearbox, it is difficult to satisfy both of the global mode and local mode characteristics.There is little research on the quick acquisition and modification of unreasonable local structural modes without affecting global modes.A method for the optimization of gearbox vibration based on structural modification of local mode characteristics is proposed.To optimize gearbox vibration, unreasonable local structural responses are obtained using a comparison of local mode frequencies and excitation frequencies.These local structural modes are then modified using topology optimization.The results show that this new method can be used to quickly and effectively control the vibration of a gearbox during the initial design stage and provide an optimum structural design.