基于SIMPACK的钢桁梁斜拉桥车-桥系统动力性能分析

为研究铁路高速化、重载化引起的车-桥系统耦合动力问题,以新建南广客运专线郁江双线主跨228 m钢桁梁斜拉桥为工程背景,采用有限元软件ANSYS建立桥梁的动力模型并进行子结构分析、模态分析;采用多体动力学通用软件SIMPACK建立CRH2动车组模型,通过读取桥梁模态信息,在SIMPACK中实现列车与桥梁的数据交换,最终实现车-桥系统动力性能分析。对分析结果进行评估,结论为:当CRH2动车组以设计速度200km/h通过该桥时,列车走行性具有"优良"的动力性能;以基础设施预留250km/h的速度通过该桥时,除了列车横向总体舒适性指标为"良好"外,其余列车走行性具有"优良"的动力性能。这说明桥梁能提供足够的刚度,满足高速列车运行的高平顺性要求。

Dynamic Performance Analysis of Vehicle-Bridge System for a Cable-stayed Bridge with Steel Truss Girder Based on SIMPACK

In order to study the vehicle-bridge coupling dynamic problems caused by high speed and heavy load on railway,the Yujiang cable-stayed bridge with steel truss girder and 228-m main span on the Nanning-Guangzhou Railway passenger dedicated line was taken as an example in this paper,and a dynamic model of this bridge was modeled by using finite element software ANSYS to carry out substructural analysis and modal analysis.And then,by using multi-body dynamics software SIMPACK,the CHR2 EMU model was modeled.After that,the bridge and vehicle models were coupled by exchanging useful data between these two systems.Through assessment on the analysis result, the following conclusions could be reached: the traveling performance of vehicle was "very good"when the CRH2EMU passed through the bridge at the design speed of 200km /h; except that the lateral comfort level was"good",the rest of traveling performances were all"very good"when vehicle passed through the bridge at a reserved speed of 250km /h.In conclusion,the bridge can provide enough stiffness to meet the requirement for high geometric regularity of high speed railway.