The formula of twist Angle ofrail is derived and lateral displacements on the topofrail subjected to the several different loads are calculated by using the formula.
推导了钢轨扭转角的计算公式，并计算了几组不同荷载作用下的轨顶水平位移。
2
China is the first and only country to have commercial high-speed train service on conventional rail lines that can reach a top operational speed of 350 km/h.
France broke the world rail-speed record when a high-speed train travelling on the new line from Paris to Strasbourg touched a top speed of nearly 575kph (357mph).