摘要
通过建立车辆轨道耦合动力学模型,分析了普通整体道床、弹性支承块与浮置板三种轨道结构轨下支承失效后的动力响应。结果表明:轨下支承失效对列车通过时轮轨系统动态响应的影响较大;随着轨下支承失效个数的增加与列车运行速度的提高,轨道结构的位移、支座反力、轮轨力的动力响应都将显著增加。
With the development of urban rail transit, the effect of track support failure on dynamic characteristics of railway track has attracted more and more attention. De- pending on the vehicle/track coupling dynamic model, the dynamic responses of support failure are calculated for the common solid bed track, the low vibration track and the floating slab track. Then the track＇s dynamic performance is compared among the three railway structures, the result shows that when the trains pass through the voided track structure, the track support failure will greatly affects the dynamic response of vehicle system, when the number of failure increases, the displacement, the support obverse force, the railway-track forces and the internal steel of railway track will increase significantly.
出处
《城市轨道交通研究》
北大核心
2012年第11期67-70,共4页
Urban Mass Transit
关键词
轨道结构
动力性能
轮轨耦合
轨下支承失效
railway track structure
dynamic characteris-tics
vehicle/track coupling
track support failure
