轮轨热接触耦合效应有限元分析.pdfVIP

第11 卷 第1 期 交 通 运 输 工 程 学 报 V ol11 No1 2011 年2 月 Jour nal of T r affic and T ransp ort ation Engineering Feb . 2011 : 167 11637( 20 11 0 1002506 1 1 1, 2 孙传喜 , 张 军, 王春艳 ( 1 , 116028; 2 , 6100 31 : 针对制动热应力问题, 运用 限元直接耦合法, 对车轮热接触工况进行了模拟, 采用耦合方 程同时求解温度场和位移场, 研究了纯机械载荷工况和热接触耦合工况下轮轨应力分布与变化规 律, 分析了车轮及钢轨表层材料和次表层材料的变形温度与应力之间的关系分析结果表明: 由 于热应力的影响, 车轮表面以下 0~ 1 mm 的表层区域等效应力最大值增大了18% , 且车轮等效应 力较大区域由表面以下1~ 4 mm 处的次表层区域变动至车轮表面以下0~ 3 mm 处 : 铁道工程; 轮轨接触; 热应力; 限元法; 热接触耦合 : U 211. 5 : A Finite element analysis of wheel/ rail thermocontact coupling effect 1 1 1 SU N Chuanx i , Z H A N G Jun , WA N G Chunyan ( 1. Scho ol of T raff ic and T ranspo rtation , Dalian Jiaotong U niversity, Dalian 116028, L iaoning, China; 2 . T ractio n P ow er State K ey L aborato ry , Southw est J iao tong U niv ersit y, Cheng du 6 100 31, Sichuan, China Abstract: A iming at the t hermal st ress cau sed by brake, a thermoco nt act coupling calculat ion method w as u sed t o simulat e t he pro cess of w heel/ rail t herm al co nt act based on f init e elem ent method . T he t emper at ure field and displacement field w ere synchronou sly solved by using coupling equat ions. T he dist ribut ing and vary ing rules of t he stresses fo r w heel and rail w ere st udied under pure mechanical load condit ion and thermoco nt act coupling condit io n. T he relat ion am ong t he displacements , t em perat ures and str esses of w heels and rails surf aces and seco nd surf aces w ere analy zed. A naly sis result sh