城市轨道交通靴轨关系的安全测试评估方法

Safety Assessment Method of Collector Shoe-Rail Relationship in Urban Rail Transits

为实现城市轨道交通初期运营前靴轨关系的安全评估,采用激光摄像、紫外光电传感、光纤光栅应变传感技术对接触轨动态几何参数、靴轨燃弧、靴轨动态接触力、集电靴硬点进行检测.根据各项检测参数的特征分别确定各参数评定标准;选择接触轨工作高度、接触轨偏移值、靴轨燃弧率和靴轨动态接触力4项检测参数,采用Topsis评价方法构建接触轨质量指数评价函数;基于各参数评定标准和质量指数评价函数提出一套城市轨道交通初期运营前靴轨关系安全评估方法;利用运营车靴轨关系检测装置对广州地铁21号线镇龙西—员村段进行了全线数据检测.研究结果表明:全线接触轨动态几何参数与设计值偏离均不超过±5 mm,最大燃弧时间为53 ms,最大燃弧率为0.025%,区间平均接触力最大值和最小值分别为135.6、119.8 N,集电靴硬点最大为29.8 g,全线质量指数评分大于92.89分.

In order to realize the safety assessment of the relationship between the collector shoe and contact rail before the initial operation of urban rail transits,the laser imaging,ultraviolet photoelectric sensing,and fiber bragg grating strain sensor are used to measure the dynamic geometric parameters of the contact rail,arcing and dynamic contact force of the collector shoe-rail,and hard spots of the collector shoe.According to the characteristics of each test parameter,their evaluation standards are determined.Four parameters,which are contact rail operation height,contact rail offset,arcing rate and dynamic contact of the collector shoe-rail,are selected to establishe the evaluation function of contact rail quality index through Topsis evaluation method;then based on the above-mentioned evaluation standards and evaluation functions,a set of safety evaluation methods are proposed for the collector shoe-rail relationship before the initial operation of urban rail transits.The inspect device for the collector shoe-rail relationship is used to collect the data of the Zhenlongxi−Yuancun section on Guangzhou Metro Line 21.The results reveal that for the entire line,the deviation between the dynamic geometric parameters and their design values does not exceed±5 mm,maximum arcing time lasts 53 ms,maximum arcing rate is 0.025%,maximum and minimum average contact force is 135.6 N and 119.8 N respectively,maximum hard spot is 29.8 g,and the quality index score is bigger than 92.89 points.