南京大胜关长江大桥轻轨列车走行性研究

Research on the Light Rail Transit Ride Quality of Nanjing Dashengguan Yangtze River Bridge

以南京大胜关长江大桥使用托架结构搭载轨道交通为研究背景,基于车桥耦合振动分析理论对轻轨列车走行性进行分析。结果表明:轻轨列车以不同负载状态和车速运行时,桥梁结构的动力响应均较小,列车的运行安全性和乘坐舒适性均为优;车辆负载状态对桥梁及车体的振动响应有较大影响;车辆脱轨系数、轮重减载率、倾覆系数、车体振动加速度、舒适性指标均随车辆负载减小而增大,轻轨列车的安全性主要由空载状态控制。

Taken the light rail transit(LRT)carried by brackets of Nanjing Dashengguan Yangtze River Bridge asresearch background,the LRT ride quality is analyzed by adopting the vehicle-bridge coupled vibration analysis theory.The results show that in different LRT load states and running speed,the bridge dynamic responses are at low level,and the LRT running safety and ride comfort are excellent.The LRT load state has great impacts on the bridge and thetrain vibration responses.The LRT derailment coefficient,wheel load shedding rate,overturning coefficient,bodyvibration acceleration and comfort index increase with the decreasing of train load state.No-load state is the critical loadstate related to the LRT running safety.