基于灵敏度分析的中高地板铰接车体整体性能优化设计  

Optimization Design of Overall Performance of Middle and High-floor Articulated Carbody Based on Sensitivity Analysis

作　　者：崔效健 谢素明[1] 陈舒[2] 姜士鸿 CUI Xiaojian;XIE Suming;CHEN Shu;JIANG Shihong(School of Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China;Railway Rolling Stock Department,Heilongjiang Jiaotong Polytechnic,Harbin 161000,China;CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130062,China)

机构地区：[1]大连交通大学机车车辆工程学院,辽宁大连116028 [2]黑龙江交通职业技术学院铁道车辆系,黑龙江哈尔滨161000 [3]中车长春轨道客车股份有限公司,吉林长春130062

出　　处：《铁道车辆》2025年第2期98-104,共7页Rolling Stock

摘　　要：利用有限元分析与结构优化技术,解决中高地板铰接车体整体性能指标偏低的问题。首先根据结构承载特点建立铰接车体有限元模型,经分析得出车体垂向刚度及整备车体一阶垂弯振动频率不满足标准要求;通过位移及频率灵敏度分析,筛选敏感的主结构型材板厚作为刚度及频率优化的设计变量;再分别以静态刚度和动态频率为目标函数开展尺寸优化,基于优化结果确定主结构铝型材的厚度;优化后的车体在最大超员载荷下,其底架边梁中部最大垂向位移降为10.4 mm,整备车体一阶垂弯频率提升至10.8 Hz。The FEA and the structure optimization technology are used to solve the problem of lower overall performance indices of the middle and high-floor articulated carbody.Firstly,the finite element model for articulated carbody has been built according to the structure carrying characteristics,and it turns out from the analysis that the vertical rigidity of carbody and the first-order vertical bending vibration frequency of the serviced carbody don’t meet the standard requirements;through displacement and frequency sensitivity analysis,the sensitive main structure profile plate thickness is selected as a design variable of rigidity and frequency optimization.Then the static rigidity and the dynamic frequency are taken separately for objective functions to optimize the dimensions and the thickness of the aluminum profile of the main structure is determined based on the result of optimization.For the optimized carbody under the maximum overload,the maximum vertical displacement of the middle part of side sill of the underframe is reduced to 10.4 mm and the first-order vertical bending frequency of the serviced carbody is increased to 10.8 Hz.

关 键 词：铰接车体 整备车体模态 灵敏度分析 刚度优化 频率优化 

分 类 号：U270[机械工程—车辆工程]