基于并行计算的大跨度斜拉桥行车安全分析  

Simulation analysis for running safety of a light-rail train on a long span cable-stayed bridge based on parallel computation

作　　者：杜新光[1] 金先龙[1,2] 陈向东[1] 

机构地区：[1]上海交通大学高性能计算中心,上海200240 [2]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《振动与冲击》2010年第7期5-8,78,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(60174023);科技部社会公益研究专项基金项目(2004DIB2J046)

摘　　要：采用有限元分析方法对轻轨车辆在大跨度双层斜拉桥上的行车安全进行了评估。建立了斜拉桥与轻轨车辆耦合振动的精细三维有限元模型,其中桥梁模型包括主塔、过渡墩、辅助墩、支撑桩、土体、斜拉索以及桥面系统等;轻轨车辆模型包括车体、转向架、轮对及弹簧阻尼系统等,整体有限元模型的单元与节点数均超过百万。设计了基于接触均衡的并行分区算法,在上海超级计算中心的曙光4000A上完成了仿真计算,解决了模型庞大带来的求解困难。求得了轻轨车辆在大跨度斜拉桥上运行的轮轨横向和垂向接触力,通过计算最高车速下单车匀速、双线汇车两种工况的轮重减载率及脱轨系数,分析了桥梁的行车安全,结果为斜拉桥的安全设计提供了参考依据。Based on the finite element analysis method,the running safety of light-rail train on a long span double deck cable-stayed bridge was evaluated.The total amount of elements and nodes for the refined 3D coupled vibration finite element model,in which the bridge was made up of main truss,cable,tower,piers,cap,piles,and soil as well as the light-rail vehicles included car body,bogie,wheel-set,and spring-damping systems,was over 2.2 million.The model was solved on the Dawning 4000A supercomputer of Shanghai Supercomputer Center based on the contact balance bisection (CBB) algorithm for parallel computing,the vertical and transverse wheel-rail interaction force were obtained.According to the derailment coefficient and the wheel load reduction rate under the maximum velocity,the running safety of a light-rail train was analyzed,it provided a reference for safety design of a long span cable-stayed bridge.

关 键 词：大跨度斜拉桥 行车安全 并行计算 仿真分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U447[交通运输工程—道路与铁道工程]