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Improved Dynamics Model of Locomotive Traction Motor with Elasticity of Rotor Shaft and Supporting Bearings

Chinese Journal of Mechanical Engineering 2022年第5期35卷 333-350页

作者： Yuqing Liu Zaigang Chen Jieyu Ning Kaiyun Wang Wanming Zhai State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China

The locomotive traction motor is described as a rotor-bearing system coupling the kinetic equations of the traction shaft and its support bearings with the determination of their elastic deformations in this *** the effect of excitations induced by the dynamic rotor eccentric distance and time-varying mesh stiffness,the elastic structure deformations of the shaft and support bearings are formulated in the vibration environment of the *** addition,the nonlinear contact forces between the components of the rolling bearing,the lubricating oil film,and radial clearance are comprehensively considered in this *** results indicate that the elastic deformations of the shaft and bearings can change the dynamic responses of the traction motor and its support *** are large differences between the ranges of the rotor motion calculated by the rigid and the flexible traction motor models when the intensified wheel-rail interaction is *** the increase of the rotor eccentricity,the results underscore the role of the elasticity of traction shaft and support bearings in dynamic researches of the traction *** critical value of the initial eccentric distance for the rub-impact phenomenon decreases from 1.23 mm to 1.15 mm considering the flexible effect of the shaft and *** dynamics model of the traction motor can provide more accurate and reasonable simulation results for correlational dynamic researches.

关键词： Traction motor Bearing gear mesh Vehicle-track coupled dynamics

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Systematical Development of NVH Engineering for Vehicle Electrical Powertrain Based on an Optimized V-Model

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World Journal of Mechanics 2021年第2期11卷 7-15页

作者： Shaoyou Shi Kaiyu Yu Zecheng Zhong Shanghai Electric Group Co. Ltd. Central Academe Shanghai China

For systematical NVH development of vehicle (especially for mass-production passenger vehicles) electric powertrain, an optimized V-Model is designed and has been implemented in the entire component-vehicle development, which integrates three individual branches: simulation, validation and optimization. Compared to the V-models in the traditional sense, this optimized V-model is not only driven by requirement and task accomplishment but also maximum optimization of NVH system performance. In this case, developing procedures are capable to be efficiently iterated and the NVH engineering can be expanded into 3D with this V-model.

关键词： V-Model NVH (Nosie Vibration and Harshness) SEP (System Engineering Process) Electrical Powertrain MBS (Multi-Body System) Acoustic Electromagnetic gear mesh Topology Optimization

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