某纯电动汽车白车身模态的分析与校核  

Modal analysis and verification of an electric vehicle body-in-white

作　　者：马倩昀 冯国胜 贾素梅 李书利[2] 靳豹[2] MA Qianyun;FENG Guosheng;JIA Sumei;LI Shuli;JIN Bao(College of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China;Great Wall Motor Company Limited,Baoding 071000,Hebei,China)

机构地区：[1]石家庄铁道大学机械工程学院,河北省石家庄市050043 [2]长城汽车股份有限公司,河北省保定市071000

出　　处：《农业装备与车辆工程》2023年第7期51-55,共5页Agricultural Equipment & Vehicle Engineering

基　　金：河北省省级科技计划资助(20312204D)。

摘　　要：为防止白车身模态频率与外界激励频率重合而产生共振,影响汽车舒适性和驾乘人员的情绪,对建立的白车身模型进行模态分析。根据某车企提供的白车身图纸,绘制白车身几何模型,通过一系列中面抽取、网格划分、材料属性定义、1D单元连接等前处理操作,建立了白车身有限元模型。基于该模型完成了模态计算,并与外界激励频率——路面不平度激励、车轮不平衡振动激励以及传动系不平衡激励进行对比,仿真结果显示:该白车身模态可避免与外界激励发生共振,白车身在初始设计阶段其模态性能已符合企业标准。In order to prevent the resonance of Body-In-White modal frequency overlapped with external excitation frequency from affecting the comfort of the vehicle and the emotions of drivers and passengers,the modal analysis of BIW model was carried out.The geometric model of the body-in-white was drawn through the body-in-white drawings provided by a certain car company,and the finite element model of the body-in-white was established through a series of pre-processing operations such as midplane extraction,mesh division,material attribute definition,and 1D unit connection.Based on the model,the modal analysis was completed and compared with the external excitation frequency:road unevenness excitation,wheel imbalance vibration excitation,and driveline imbalance excitation.The simulation results show that the BIW modal can avoid resonance with external excitations,so the modal performance of the BIW in the initial design stage has already met the corporate standards.

关 键 词：白车身模型 有限元模型 模态分析 外界激励 

分 类 号：U463.82[机械工程—车辆工程] U461.4[交通运输工程—载运工具运用工程]