高速铁路用锥套式终端锚固线夹结构设计研究

锥套式终端锚固线夹是高速铁路中最常用的对接触线进行终端锚固的零部件。通过建立包含锥套式终端锚固线夹本体、楔子及接触线的完整有限元分析模型,对高速铁路常用的3种终端锚固线夹结构设计开展了研究。结果表明:在同样的工作荷载(33 kN)下,A型楔子需要较长的位移(1.12 mm)产生足够的锚固力,且楔子的位移更为集中在楔子细端部,同时A型楔子内表面所受到的压力最大;B型楔子对接触线表面产生的压力高于其他两种类型,达到了293 N;C型楔子的锚固位移量、楔子内表面压力和接触线表面压力均小于A型和B型,而在接触线表面产生的切向力(135 N)最大。C型楔子型式在同等接触线工作荷载下,不易造成楔子或接触线的断裂失效,是更为合理的终端锚固线夹设计结构。

The taper-sleeve terminal anchor clamp is the most commonly used fittings for terminal anchoring of contact wire in high-speed railways.Through establishing of a complete finite element analysis model for the taper-sleeve terminal anchor clamp including body,wedge and contact wire,studies are made for the structural design of three types of terminal anchor clamps commonly used in high-speed railway.The results show that:under the same contact wire tension(33 kN),type A wedge needs a longer displacement(1.12 mm)to generate sufficient anchor force,and the displacement of the wedge is more concentrated at the small-end of the wedge.At the same time,the inner surface of type A wedge suffers the maximum pressure.The pressure of type B wedge on the contact wire surface is higher than that of the other two types,reaching 293 N;the anchoring displacement,wedge inner surface pressure and contact wire surface pressure of type C wedge are less than those of type A&B,moreover,the tangential force(135 N)generated on the surface of the contact wire is the largest.Therefore,under the same contact wire tension,the type C wedge is not liable to cause the fracture failure of the wedge or the contact wire,and is a more rational design structure of the terminal anchor clamp.