摘要
运用基于车辆单元与轨道单元的车辆-轨道系统振动分析数值方法,研究地铁弹性扣件失效对轨道结构振动特性的影响。研究结果表明,列车通过弹性扣件失效轨道时,轮轨间相互作用增大,各动力学指标值成倍增长,且随着扣件失效数量增加,动力响应增幅明显;失效扣件临近轨道结构的支承反力急剧增大,加速了线路几何形位的恶化。此外,地铁弹性扣件刚度低、橡胶垫层易老化,随着行车密度的提高,扣件失效产生的动力影响更加显著。
By use of the numerical method of vibration analysis of vehicle and track system with the vehicle element and track element,the influences of elastic fastener failure on vibration characteristics of subway track structure are investigated. The research results show that the interaction between wheel and rail increases when a vehicle passes through the track with failure fastener,moreover,the value of each dynamic index grows rapidly. As the number of failure fastener increases,so do the system dynamic responses. The supporting force of the track structure which is near the failure fastener also grows remarkably and will speed up deterioration of the track geometry. Furthermore,for the properties of low stiffness and rubber pad easily aging of subway elastic fastener,the impact of the dynamic response generated by failure fastener will be more significant with the surge of traffic density.
出处
《华东交通大学学报》
2013年第3期55-60,共6页
Journal of East China Jiaotong University
基金
铁路环境振动与噪声教育部工程研究中心资助项目(09111094)
国家自然科学基金项目(51208198)
关键词
弹性扣件
扣件失效
轮轨相互作用
轨道结构振动
elastic fastener
fastener failure
wheel-rail interaction
track structure vibration
