小半径曲线科隆蛋扣件地段钢轨波磨特性

Rail corrugation characteristics in sharp radius curve section with Cologne Egg fasteners

为研究小半径曲线科隆蛋扣件轨道的波磨演化特征,首先通过分析钢轨波磨实测数据,获得了波磨的典型通过频率;然后运用车辆-轨道空间耦合模型和基于摩擦功理论的钢轨材料摩擦磨损模型,对曲线段钢轨波磨特性进行了分析。结果表明:导向轮可承载的外侧蠕滑力几乎全程达到饱和,内侧蠕滑力部分达到饱和,且饱和部分呈周期性出现;当蠕滑力等于饱和蠕滑力时,磨耗深度最大,并且内轨的磨耗深度幅值大于外轨。结合钢轨磨耗预测型面可知,外轨主要发生侧磨,内轨则趋向发生波磨,从而出现内轨波磨严重而外轨波磨轻微这一现象。磨耗频域特性分析表明,内轨磨耗等级含有与实测波磨通过频率相近的特征频率,且这些频率处的磨耗增长率较大,说明对应频率的磨耗将不断发展,最终形成波磨。

In order to study the corrugation evolution characteristics on the Cologne Egg fastener track in sharp radius curve, the typical passing frequencies of corrugation are obtained by analyzing the measured data of rail tchoer rfurigcattiioonn. wTohrek nt,h uesoirnyg, tthhee rvaeilh iccolrer-utrgaactiko snp cachea rcaoctueprliestdi cms oodf ecl uarnvde rsaeicl timoant earriea li nfrviecsttiiogna taendd. Twheea rr emsuoldtse ls bhao€"§swe dt hoant the creep force on the outside that the guiding wheelset can bear almost reaches saturation, while the creep force on the inside reaches saturation partly, and the saturation part appears periodically. The wear depth reaches the largest when the creep force equals the saturated creep force, and the amplitude of the wear depth curve of the isnidnee r wreaialr ism laairngleyr othccaun rtsh aotn otfh teh oe uoteurt erra rila,i l.w hCiolem cboinrriungg atwiiotnh ttehne dpsr teod ioctcicounr porno ftihlee oinf nreari l rawiel,a r,w ihti ccha nr ebseu lstes ein€"§n tthhaet phenomenon of serious inner rail corrugation and slight outer rail corrugation. The frequency characteristic analysis of wear shows that: The inner rail wear grades contain characteristic frequencies similar to the measured corrugation passing frequencies, and the wear growth rates at these frequencies are relatively high, which indicates that the wear at corresponding frequencies will continue to develop and finally form corrugation.