某电驱桥车型Moan噪声分析与优化控制  

Moan Noise Analysis and Optimal Control of an E-axle Vehicle

作　　者：金文辉[1] 邓欣[1] 段龙杨 钟秤平 JIN Wenhui;DENG Xin;DUAN Longyang;ZHONG Chengping(Jiangling Auto Co.,Ltd.,Nanchang 330001,China;Jiangxi Key Lab.of Vehicle Noise and Vibration.,Nanchang 330001,China)

机构地区：[1]江铃汽车股份有限公司,南昌330001 [2]江西省汽车噪声与振动重点实验室,南昌330001

出　　处：《噪声与振动控制》2021年第4期270-275,共6页Noise and Vibration Control

摘　　要：电驱桥系统作为新能源商用车型的主流动力系统直接驱动车轮行驶。由于没有悬置,驱动电机及减速器直接装配在驱动桥上,通过板簧和减震器与车身或车架连接。没有传统发动机噪声的掩蔽,电驱桥NVH问题对NVH工程师挑战极大。针对某电驱桥商用客车中高车速工况下车内存在的明显Moan问题,运用“源-路径-响应”理论进行分析。结合实验和仿真方法进行排查分析,锁定主要原因为电驱桥一轴的动不平衡激励偏大。通过改变减速器速比,降低同一车速下对应的电驱桥一轴转速,从而可降低该车型高速Moan噪声。As the mainstream power systems of new energy commercial vehicles,the E-axle systems are directly used to drive the wheels.Since there is no suspension for the E-axle system,the drive motor and reducer are directly assembled on the axle,which is connected to the body or frame through leaf springs and shock absorbers.Without the traditional engine noise masking,the NVH problem of the E-axle poses a great challenge to NVH engineers.This article aims at the obvious Moan problem in a commercial passenger vehicle with the E-axle under medium and high speed operation conditions.The“source-path-response”theory is used to analyze the vehicle.Through the analysis of test and CAE simulation results,it is confirmed that the overlarge dynamic imbalance excitation of the first axis of the E-axle is the main cause of the Moan noise.By changing the speed ratio of the reducer,the first axis rotating speed of the E-axle corresponding to the same vehicle speed is reduced,so that the high-speed Moan noise of this vehicle is reduced.

关 键 词：声学 电驱桥 减速器 高速 Moan 动不平衡 

分 类 号：TB535[理学—物理]