train wheel bridge

In course of train's braking, wheel load bring pressure to track and bridge structure qua locomotive load.

列车制动过程中，车轮荷载作为移动荷载作用于线路和桥梁结构。

互联网摘选

One cause is that relative displacement between wheel and track is not considered in existing computing model for train-bridge system vibration, the train is all in safety state, and the whole process of derailment cannot be simulated with the computing model;

其原因在于：（1）用于制定该限值的车桥振动计算模型假定轮轨密贴，列车始终处于安全运行状态，不能计算列车脱轨全过程；

互联网摘选