高速列车过桥线缆位姿变化的扭转特性研究  

Investigation on torsion characteristic of high-speed train cables due to attitude variation

作　　者：崔志国 张强 谭磊[1] 沈超 肖合婷 周伟[2,3] CUI Zhiguo;ZHANG Qiang;TAN Lei;SHEN Chao;XIAO Heting;ZHOU Wei(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;Key Laboratory of Traffic Safety on Track of Ministry of Education,Joint International Research Laboratory of Key Technology for Rail Traffic Safety,National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Central South University,Changsha 410075,China)

机构地区：[1]中国中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中南大学交通运输工程学院,湖南长沙410075 [3]中南大学轨道交通安全教育部重点实验室,轨道交通安全关键技术国际合作联合实验室,轨道交通列车安全保障技术国家地方联合工程研究中心,湖南长沙410075

出　　处：《铁道科学与工程学报》2022年第11期3148-3156,共9页Journal of Railway Science and Engineering

基　　金：湖南省自然科学基金面上资助项目(2020JJ4118);高新技术产业科技创新引领计划(2021GK4032);国家重点研发计划资助项目(2017YFB1201201)。

摘　　要：过桥线缆是高速列车车间电力、信号传输的重要载体,列车在行经曲线区段时线缆被频繁扭动、挤压导致疲劳破坏,该失效过程是线缆夹持点空间位置与姿态变化的复杂扭转问题,也是目前高速列车线缆设计与评估的难点。通过夹持点间线缆弯曲和旋转组合的位姿解耦与运动复原,考虑不同出线角度建立基于空间六面体的线缆空间位姿变化几何表征模型,并给出夹持点相对扭转角的理论计算模型;设计可实现线缆夹持部位水平横向、纵向、周向自由度与出线角度的多自由度位姿变化模拟试验台,通过线缆配合滚动轴承内圈、线夹配合轴承外圈实现线缆与线夹的相对偏转示值读取,对比分析0°,15°,30°,45°,60°,75°和90°7种出线角下线缆扭转角理论值与测试值。不同出线角下线缆扭转角计算与试验结果趋势吻合较好,两者误差不超过1.0°;同等线缆位姿变化下,线缆单端扭转角随根部出线角的减小而非线性下降,且出线角度越小,单端扭转角下降幅度越大。研究结果表明:提出的线缆空间位姿变化相对扭转角理论计算模型准确、可靠,可为高速列车线缆的高效设计、科学安全评估与优化提供依据。Bridge cable is an essential carrier for power and signal transmission in the high-speed train vehicle.The cable is frequently twisted and squeezed when the train passes through the curve section, resulting in fatigue damage. Design and safety evaluation thus become a difficulty on train cables. By decoupling and recovering the posture of cable bending and rotation between clamping points, a geometric model of cable spatial posture based on spatial hexahedron was established considering different exit angles.A theoretical, analytical calculation model of relative torsion angle at clamping points was derived. By using the cable with the inner ring of the rolling bearing and the cable clamp with the outer ring of the approach to achieve the relative deflection of the cable and the cable clamp, the difference between the theoretical and test values of the cable torsion angle under the seven exit angles of 0°, 15°, 30°, 45°, 60°, 75°, and 90° was compared and analyzed. The calculation of the cable twist angle at different exit angles agrees well with the test results. The error between the two does not exceed 1.0°.Under certain cable posture change, the cable single-end twist angle decreases non-linearly as the root exit angle reduces. The smaller the exit angle, the more significant drop of the single-end twist angle. The results are drawn as follows. The proposed theoretical calculation model of the relative torsion angle of cable spatial posture change is accurate and reliable, providing a basis for efficient design, scientific safety assessment, and optimization of high-speed train cables.

关 键 词：过桥线缆 高速列车 几何表征 扭转特性 高效设计 

分 类 号：U271.91[机械工程—车辆工程]