摘要
曲线连接装置用于连接环行试验线内环线和外环线,通过调整钢轨的位置实现线路方向的转换。本文通过曲线连接装置动力性能试验,测试连接装置的运行安全性,轨道结构动荷载、动变形、振动等性能。试验结果表明:连接装置处的脱轨系数、轮重减载率、轮轴横向力、轮轨水平力、轮轨垂直力、钢轨横向和垂向位移、钢轨振动加速度、轨枕振动加速度等各项检测指标均符合相关规范的要求。但与普通线路相比,其脱轨系数、轮轴横向力、轮轨水平力、轮轨垂直力、外轨横向位移和轨距动态变化量有所增大;轮重减载率、内轨横向位移、内轨垂向位移和钢轨振动加速度与普通线路比较接近;外轨垂向位移和轨枕振动加速度明显小于普通线路。建议采取提高连接装置轨道检修频次、加强道床捣固等必要措施,进一步优化连接装置轨道结构,提升其稳定性。
The curve connection device is used to connect the inner ring and the outer ring in Loop Test Line, and the lille is switched by adjusting the connection device. Through the dynamic performance test for Curve Connection Device, the operating safety performance, dynamic load, dynamic deformation and track structure vibration of Curve Connection Device were tested and analyzed. The results show that the Dynamic performance indicators, such as derailment coefficient, the rate of wheel load reduction, lateral wheelset force, horizontal force between wheel and rail,wheel rail vertical force, rail lateral and verdcal displacement, rail vibration acceleration and sleeper vibration acceleration,meet the requirements of the relevant specifications. Compared with the normal rail, the derailment coefficient, lateral force of wheel shaft, wheel/rail lateral force, wheel/rail vertical force, lateral displacement of external rail are increased; wheel load reduction rate, internal rail lateral displacement, internal raft vertical displacement and rail vibration acceleration are close to those for the normal rail;the outer rail vertical displacement and sleeper vibration acceleration are significantly decreased. It is suggested to increase the track inspection frequency and emphasize on ballast roadbed compactness. Thus, the Curve Connection Device is improved and has better stability.
出处
《铁道建筑》
北大核心
2016年第6期141-145,共5页
Railway Engineering
基金
中国铁道科学研究院基金(2014YJ068)
关键词
环行试验线
曲线连接装置
有砟轨道
动力性能
试验研究
Loop test line
Curve Connection Device
Ballasted track
Dynamic performance
Experimental test
