秦沈客运专线常用跨度桥梁的动力分析

Dynamic analysis of general bridges for Qin-Shen passenger railway

铁路列车通过桥梁时将引起桥梁结构的振动 ,而桥梁的振动又反过来影响列车的运行 ,其中线路的轨道不平顺对列车和桥梁的振动起很大作用 ,这种相互作用、相互影响的问题就是列车 -线路 -桥梁耦合振动问题。随着列车速度的提高 ,桥梁的动力特性和列车运行安全性与舒适性在设计桥梁时必须加以充分考虑。本文利用 16 0km/ h、2 0 0 km/ h、30 0 km/ h三种等级的列车参数以及对应的轨道不平顺波 ,综合考虑列车 -线路 -桥梁的共同作用。全面分析秦沈客运专线设计过程中的 6 2种不同设计方案的桥梁 ,评价以上桥梁动力特性及列车走行性 ,为客运专线桥梁设计提供技术依据 ,其中有 2

Bridges under moving vehicle loads produce vibration having an effect on the vibration of vehicles at the same time, and the track irregularity affects the vibrations of both bridge and vehicle. This is called 'vehicle track bridge coupling vibration'. With the increase of train speed, it must be considered that the ride comfort creteria and train operation safety including load reduction coefficient ratio when designing bridge. In this paper, parameters of three kinds of passenger trains whose velocity is 160 or 200 or 300 km/h are used, and different track irregularity is picked out.By using these parameters and track irregularity, 62 type bridges on design time for Qin Shen passenger railway are analysed roundly.To provide technical ground for design of passenger railway, this paper appraise dynamic character of these bridges and train running performance.After examined by correlative sections, 27 type bridges are made use of Qin Shen passenger railway.