考虑振级落差要求的齿轮箱基座优化设计

Optimization design of the gearbox mounting under vibration level difference constraints

对某新型齿轮箱基座采用结构动力学优化方法进行设计改进,建立了考虑指定频率区间内振级落差性能要求,以基座重量为目标函数的齿轮箱基座尺寸与拓扑优化设计模型.通过两种优化方案,使新型基座低中频段振级落差由5dB提高到12dB,找到对振动传递影响较大的肋板和减振效果良好的结构拓扑形式.

The novel gearbox mounting is improved m design by the structural dynamic optimization method. Considered the vibration level difference performance requirements in designated frequency domain, the gearbox mounting size and the topology optimizing design model is set up with the mounting weight as the objective function. Through two kinds of structural optimizing solutions, the vibration level difference of low and middle frequency band of the new mounting can rise from 5dB to 12dB. The plate which affects largely on the vibration transmission, and a structure topology form with good vibration reducing effect, can be found.