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利用基于横向有限条与无砟轨道板段单元的车轨系统竖向振动分析方法,研究1对和多对扣件失效时城市轨道交通列车-浮置板式轨道系统的竖向振动响应。研究结果表明,当列车通过扣件失效的轨道时,轮轨相互作用增大,其中钢轨竖向位移及加速度增长最明显,且随着失效扣件数目增加,动力响应增长越明显;即使毗邻轨道的扣件工作状态良好,也受到失效扣件的影响,钢轨竖向位移及加速度增长显著;扣件失效会加速轨道结构破坏,甚至危及行车安全。
The vertical vibration analysis of the rail system based on transverse finite strip and ballastless track plate segment is used to study the vertical vibration response of the urban rail transit train-floating slab rail system with one or more pairs of fastener failures. The results show that when the train passes the failed track of the fastener, the wheel-rail interaction increases, and the vertical displacement and acceleration of the rail increase most obviously. And as the number of the failed fasteners increases, the dynamic response increases more obviously. Even if the adjacent track Of the fasteners work in good condition, but also by the impact of the failure of fasteners, rail vertical displacement and acceleration increased significantly; fastener failure will accelerate the destruction of track structure, and even endanger traffic safety.