工况下齿轮变速箱的低噪声优化方法研究(英文)

Low-noise optimization method for gearbox in consideration of operating conditions

提出了一种综合方法能够计算来自变速箱稳定的动态响应和噪声辐射。该方法在考虑时变啮合刚度、齿轮误差和轴承箱体的情况下建立圆柱齿轮传动系统的动力学模型,通过求解数学模型获得动态轴承力的数据。此外,以轴承负载力的数据为激励,数值模拟计算出变速箱的振动和噪声辐射,随着节点动态响应时间的变化,获得了变速箱的噪声频谱和共振频率范围。最后,计算了变速箱面板的共振的频率范围。基于变速箱面板声学贡献分析和振型的结论,对两个齿轮箱的刚度进行了改善。对比分析齿轮箱噪声辐射,确认该方法能有效降低噪声的产生,对变速箱的设计提供了有用的理论指导。

This paper presents a comprehensive procedure to calculate the steady dynamic re-sponse and the noise radiation generated from a stepping-down gearbox.In this process,the dy-namic model of the cylindrical gear transmission system is built with the consideration of the time-varying mesh stiffness,gear errors and bearing support,while the data of dynamic bearing force is obtained through solving the model.Furthermore,taking the data of bearing force as the exci-tation,the gearbox vibrations and noise radiation are calculated by numerical simulation,and then the time history of node dynamic response,noise spectrum and resonance frequency range of the gearbox are obtained.Final y,the gearbox panel acoustic contribution at the resonance frequency range is calculated.Based on the conclusions from the gearbox panel acoustic contri-bution analyses and the mode shapes,two gearbox stiffness improving plans have been studied. By contrastive analysis of gearbox noise radiation,the effectiveness of the improving plans is confirmed.This study has provided a useful theoretical guideline to the gearbox design.