基于模态灵敏度分析的某乘用车白车身结构优化设计  

Optimum structural design of a passenger car body-in-white based on modal sensitivity analysis

作　　者：韩继光[1,2] 赵玉清 时玲[1] 朱云 王伟超[1] 徐则民[2] HAN Ji-guang ZHAO Yu-qing SHI Ling ZHU Yun WANG Wei-chao XU Ze-min(School of Architecture and Construction, Kunming University of Science and Technology, Kunming 650093 School of Mechanic and Electronic Engineering, Yunnan Agricultural University, Kunming 650201)

机构地区：[1]昆明理工大学土木工程学院,云南昆明650093 [2]云南农业大学机电工程学院,云南昆明650201

出　　处：《机械设计》2017年第9期39-42,共4页Journal of Machine Design

基　　金：云南省教育厅科研资助项目(2014Y189)

摘　　要：建立了某乘用车白车身模态有限元分析模型,计算了白车身的振动模态。对白车身1阶扭转频率对各板件厚度的灵敏度进行了分析,得到相对抗扭灵敏度较大的板件。以这些板件为设计变量,对白车身结构进行优化设计。优化后车身的1阶扭转频率由25.24 Hz提高为27.007 Hz,避开了发动机激励的共振频率,增强了整车强度。In this paper, the finite element model of body-in-white modal of a passenger car was established and the mode of vibration was analyzed. The sensitivity of the first-order torsional frequency of body-in-white on sheet thickness was analyzed and the larger torsional sensitivity sheet was obtained. The body-in-white was optimal designed with this sheet as the design variable. The optimized first-order torsional frequency of the car body was from 25.24 Hz to 27.007 Hz, which could avoid the incentive resonance frequency of the engine excitation and enhance the strength of the vehicle.

关 键 词：白车身 模态分析 灵敏度分析 结构优化 

分 类 号：U463.821[机械工程—车辆工程]