As the use of continuous welded rail(CWR)increases in track structure,the derailing disasters associated with track also increase in great numbers due to the high compressive thermal stress.

• 把温度力作用下的无缝线路简化为纵向力作用的弹性等间距支承的无限长均匀梁结构,通过连续梁理论,建立了纵向力作用下无缝线路钢轨的振动模型。