100%低地板齿轮箱振动分析及噪声预估  

Vibration analysis and noise prediction of 100%low floor gearbox

作　　者：彭锐涛[1] 谢炎培 罗秀强 胡聪芳[1] 刘祥环 PENG Ruitao;XIE Yanpei;LUO Xiuqiang;HU Congfang;LIU Xianghuan(School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105

出　　处：《铁道科学与工程学报》2020年第12期3181-3189,共9页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51975504,51705442);湖南省自然科学(株洲)联合基金资助项目(2018JJ4082);湖南省教育厅优秀青年项目(19B539)。

摘　　要：对100%低地板齿轮箱进行振动分析和噪声预估,可为其设计及优化提供依据。建立了传动系统和结构系统相耦合的100%低地板齿轮箱刚柔耦合多体动力学模型,获得了轴承支反力;建立了齿轮箱模态分析模型,研究了箱体的振动特性。基于相似性理论设计了箱体的相似模型并对其进行了实验模态分析,验证了有限元模型的正确。将刚柔耦合多体动力学仿真获得的轴承支反力作为箱体的激励,采用直接积分法计算箱体的振动响应;以箱体振动速度作为边界条件,建立了齿轮箱直接边界元法辐射噪声分析模型,进行齿轮箱表面声压及外声场辐射噪声预估。结果表明:齿轮箱辐射噪声频域曲线的噪声峰值频率出现在齿轮副啮合频率及其谐波,以及箱体低阶固有频率处。Vibration analysis and noise prediction of 100%low floor gearbox can provide a basis for its design and optimization.A rigid-flexible coupling multi-body dynamics model of 100%low floor gearbox coupled with transmission system and structural system was established,and the bearing reaction force was calculated.The gearbox modal analysis model was established and the vibration characteristics of the housing were studied.A similar model of the housing was designed based on the similarity theory,and an experimental modal analysis was performed to verify the correctness of the finite element model.The bearing reaction force obtained by the rigid-flexible coupled multi-body dynamics simulation was used as the excitation of the housing,and the direct integration method was used to calculate the vibration response of the housing.Then,using the housing vibration velocity as the boundary condition,the direct boundary element method radiation noise analysis model of the gearbox was established,and the sound pressure on the surface of the gearbox and the external sound field radiation noise were predicted.The results show that the noise peak frequency of the gearbox radiated noise frequency domain curve appear at the meshing frequency of the gear pair and its harmonics,as well as the loworder natural frequency of the housing.

关 键 词：100%低地板 齿轮箱 刚柔耦合动力学 振动特性 相似性理论 辐射噪声 

分 类 号：TB532[理学—物理]