摘要
针对某新能源MPV电驱减速箱NVH问题,建立减速箱齿轴系多体动力学及壳体结构动力学有限元模型,进行约束模态及轴承内载工况下共振频率带内壳体谐响应分析。初始方案仿真结果与NVH台架验证试验相比:共振频率相对误差-7.21%,振动速度幅值最大相对误差10.53%,仿真建模合理且结果指向性明显。提出试验工况下的减振方案,加强减速箱后壳体中间轴承座及输出轴承座几何支撑,优化方案仿真结果表明:壳体关键振动区域及最大振动区域表面振动速度有效降低,优化方案减振效果明显。
MBS and structure dynamic modeling have been performed to solve NVH problem of E-propulsion gearbox of one MPV. Constraint modal analysis and harmonic analysis at resonance frequency range under bearing load have been done. Correlation between simulation of original proposal and NVH bench test result show resonance frequency error is 7.21% and maximum amplitude of vibration velocity error is 10.53%. It can be summarized that current modeling and simulation result are both reasonable. Optimization proposal to improve structure stiffness at middle shaft bearing and output shaft bearing to reduce gearbox vibration under current NVH bench test boundary has been point out. Simulation result of optimization proposal show significant amplitude of vibration velocity reduction on both key surface and critical surface of gear box housing.
作者
张剑
赵硕
柴少彪
孟庆祥
黄岩松
Zhang Jian;Zhao Shuo;Chai Shaobiao;Meng Qingxiang;Huang Yansong(SAIC Motor Commercial Vehicle Technology Center,Shanghai 200438)
出处
《传动技术》
2020年第1期15-20,共6页
Drive System Technique
关键词
电驱减速箱
动力学仿真
NVH试验
减振降噪
E-propulsion gearbox
dynamic simulation
NVH measurement
vibration and noise reduction
