分布式驱动电动汽车轮毂设计与优化

Design and Optimization of Wheel Hub of Distributed Drive Electric Vehicle

分布式驱动电动汽车采用轮毂电机作为驱动装置,其簧下质量增加、垂向载荷增加等因素使汽车轮毂的强度和刚度都受到影响。因此,提出了对设计的轮毂结构进行有限元分析及优化。通过参数化设计轮毂结构,运用UG软件的NX Nastran模块对轮毂进行有限元分析。通过选定模型材料及属性,创建网格单元,选定最大迭代次数,结合轮毂受力情况对模型施加约束及载荷,并以满足电动汽车轮毂强度条件下轻量化为优化目标,选定变量,得出优化分析结果,完成轮毂结构优化。优化分析结果表明,该轮毂的结构设计与优化取得了较为理想的效果,对减小分布式驱动电动汽车簧下质量具有参考价值。

Distributed drive wheel hub motor as driving device for the electric vehicle,such factors as the unsprung mass increases and the vertical load increases will affect the strength and stiffness of the car wheel hub,therefore,this article put forward finite element analysis and optimization to the design of wheel structure.Through parameterized design of wheel hub structure,using NX Nastran of UG software,finite element analysis was carried out on the wheel hub module.Through the selected model and material properties,we created a grid cell,selected maximum number of iterations,combined with the wheel force to impose constraints on the model and load,and to satisfy the intensity of the electric car wheel under the condition of light weighted as the optimization goal,selected variables,obtained the optimization analysis results,and completed wheel structure optimization.Optimization analysis results show that structural design and optimization of wheel hub achieved ideal effect,with great significance to reduce unsprung mass of the distributed driving EV.