• CN：11-2187/TH
• ISSN：0577-6686

• 特邀专栏：大国重器：复兴之路上的轨道交通技术 •

### 动车组车体模态灵敏度及优化设计研究

1. 大连交通大学交通运输工程学院 大连 116028
• 收稿日期:2017-08-30 修回日期:2017-12-29 出版日期:2018-06-20 发布日期:2018-06-20
• 通讯作者: 张军(通信作者),男,1964年出生,教授,研究生导师。主要研究方向为结构优化设计、噪声控制等。E-mail:zhangjun@djtu.edu.cn
• 作者简介:张晓林,女,1992年出生,硕士研究生。主要研究方向结构灵敏度分析及优化设计。E-mail:1062058000@qq.com
• 基金资助:
牵引动力国家重点实验室开放课题资助项目（TRL1402）。

### Research on Modal Sensitivity and Optimization Design for Car Body of the EMU

ZHANG Jun, ZHANG Xiaolin, FANG Ji

1. School of Traffic and Transportation Engineering, Dalian Jiaotong University, Dalian 116028
• Received:2017-08-30 Revised:2017-12-29 Online:2018-06-20 Published:2018-06-20

Abstract: The finite element model of car body of the electric multiple unit(EMU) is established, the car body modals are calculated in the preparation conditions by using of the finite element method, then the plate thicknesses are used as the design variables, the sensitivities of the modal frequencies with respect to the design variables are achieved by using of the numerical differential method. The influence rules of components of car body with respect to the modals are analyzed and the design variables are chosen reasonablly basing on modal sensitivities, then the optimization models are set up, the weight and lower order modal frequencies are each other chosen as the objective function and restriction conditions, the optimization designs are performed and a additions of 1.05 Hz and 0.95 Hz for first diamond modal and first bending modal are achieved respectively, but the weight of car body is not increased and the strengths of car body is not depressed relatively.