摘要
针对纯电动汽车电磁场数值分析时传统有限元法(finite element method,FEM)因数值“过硬”而计算精度低的问题,在传统FEM的基础上引入梯度光滑技术和稳定项修正,采用基于稳定节点的光滑有限元法(stable node-based smoothed FEM,SNS-FEM)对长直接地金属槽和纯电动汽车整车电磁场算例进行仿真分析。结果表明,SNS-FEM可显著降低前处理网格划分难度,在一定程度上软化数值模型,具有计算效率高、精度高、收敛速度快和抗网格畸变能力强等优点,在工业应用中具有较大潜力。
The numerical value is"overly-stiff"in the traditional finite element method(FEM)for electromagnetic field numerical analysis of pure electric vehicle,which leads to its low precision.As to this issue,the gradient smoothing technique and the correction of stability term are employed based on the traditional FEM,the electromagnetic fields of long straight grounding metal slot and pure electric vehicle are simulated and analyzed by using stable node-based smoothed FEM(SNS-FEM).The results show that the difficulty of mesh generation can be reduced using SNS-FEM,and the numerical model is softened in a certain extent.The advantages of SNS-FEM are high efficiency,high precision,fast convergence and strong ability to resist grid distortion.SNS-FEM has great potential in industrial application.
作者
郭志斌
黄湛勇
王中虎
王刚
GUO Zhibin;HUANG Zhanyong;WANG Zhonghu;WANG Gang(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China;Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles,Tianjin 300130,China)
出处
《计算机辅助工程》
2020年第4期22-27,共6页
Computer Aided Engineering
基金
国家自然科学基金重点项目(11832011)
国家自然科学基金青年基金(11702080)
河北省自然科学基金青年基金(A2018202205)。
关键词
纯电动汽车
稳定节点
积分算法
梯度光滑
电磁场
有限元
pure electric vehicle
stable node
integration method
gradient smoothing
electromagnetic field
finite element
