竖曲线桥上带减振扣件整体道床轨道动力学特性分析

来源期刊:中南大学学报(自然科学版)2016年第1期

论文作者:任娟娟 齐少轩 巫江 刘学毅

文章页码:314 - 321

关键词:减振扣件;多体系统动力学;整体道床;竖曲线

Key words:damper fastener; multi-body system dynamics; monolithic track bed; vertical curve

摘    要:为了提供竖曲线上无砟轨道设计的理论依据,对列车动荷载对竖曲线桥上带减振扣件整体道床轨道动力学特性的影响进行研究。参考贵阳地铁1号线带减振扣件的整体道床轨道结构形式,基于多体系统动力学和轮轨系统动力学的基本原理,简化建立列车-轨道-桥梁系统垂向振动空间模型,计算分析不同速度、坡度代数差和桥梁竖曲线半径对列车和轨道结构动力学特性的影响规律。研究结果表明: 从行车安全和舒适度角度出发,对于在竖曲线桥上带减振扣件的整体道床轨道,当行车速度为80 km/h时,建议有竖曲线的坡度代数差应小于18‰,无竖曲线的坡度代数差应小于4.5‰,竖曲线半径应大于2.5 km;当行车速度为100 km/h时,建议有竖曲线的坡度代数差应小于10‰,无竖曲线的坡度代数差应小于4‰,竖曲线半径应大于4 km;当行车速度为160 km/h时,建议有竖曲线的坡度代数差应小于5‰,无竖曲线的坡度代数差应小于2‰,竖曲线半径应大于5 km。

Abstract: In order to provide the logical proofs for the design of slab track on the vertically curved substructure, the dynamic characteristics of the monolithic track bed with damper fastener on the vertically curved bridges were researched under the effect of the train-induced dynamic load. A study on the monolithic slab track with damper fasteners of Guiyang subway line No. 1 was conducted by establishing a vertically coupled vibration model of vehicle-track-bridge system, based on the basic principle of wheel/rail system dynamics and the multi-body system dynamics theory. The influence of the different train speeds, the different gradient differences of track and the different radii of vertical curve of track on the dynamic responses of vehicles and track structure components were analyzed. From the point of view of safety and comfort for the operation, the numerical simulation indicates that for the monolithic slab track bed with damper fastener on vertically curved bridges: when the train speed reaches 80 km/h, the gradients difference is less than18‰ for the track with vertical curve, the gradients difference is less than 4.5‰ for the track without vertical curve, and the radius of the vertical curve is greater than 2.5 km; when the train speed reaches 100 km/h, the gradients difference is less than 10‰ for the track with vertical curve, the gradients difference is less than 4‰ for the track without vertical curve, and the radius of the vertical curve is greater than 4 km; when the train speed reaches 160 km/h, the gradients difference is less than 5‰ for the track with vertical curve, the gradients difference is less than 2‰ for the track without vertical curve, and the radius of the vertical curve is greater than 5 km.

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