In-situ Comparison Test of Vibration Reduction Effect of the Steel Spring Floating Slab Track
李明航 1吴宗臻 1马蒙 2王文斌 1张胜龙1
扫码查看
点击上方二维码区域，可以放大扫码查看
作者信息
1. 中国铁道科学研究院集团有限公司城市轨道交通中心 北京,100081
2. 北京交通大学土木建筑工程学院 北京,100044
折叠
摘要
为研究随机列车荷载作用下钢弹簧浮置板轨道(steel spring floating slab track,简称SSFST)上线运营后的减振效果,选取某地铁线路同一区间、同一曲线段内的普通无砟轨道及钢弹簧浮置板轨道典型测试断面,在同一天内开展了现场对比测试.研究结果表明:钢弹簧浮置板轨道减振效果的线上评估结果与列车、轨道的实际运营状态直接相关;在不同列车的随机激励作用下,Z振级相对插入损失(△VLz.max)相差超过10dB,且部分测试样本无法满足特殊减振的设计需求;为获得保守的评价结果,应选择轮、轨平顺状态良好的运营区段开展对比测试;通过合理的养护维修,使运营列车及轨道保持良好的运行状态,是减振轨道区段满足振动控制需求的关键.
Abstract
In order to study the vibration reduction effect of steel spring floating slab track(SSFST)on opera-tion line under random moving train load,a comparing in-situ test is performed at the same time on two measur-ing sections including regular ballastless slab track and SSFST in the same curve section of a subway line.The results indicate that:the on-line evaluation results of the vibration reduction effect of SSFST are directly related to the operation state of the train and track.The difference value(ΔVLZ.max)is even more than 10 dB under ran-dom dynamic excitation,and some test samples fail to meet the design requirements of special vibration reduc-tion.In order to obtain conservative evaluation results of vibration mitigation effect,the operation section with good wheel and rail irregularity should be selected for comparing in-situ test.Through reasonable maintenance,keeping the operating trains and tracks in good operating condition is the key to meeting the vibration control re-quirements of the vibration-damping track sections.
关键词
钢弹簧浮置板轨道/减振效果/列车振动/地铁
Key words
steel spring floating slab track/vibration mitigation effect/train-induced vibration/metro
维普
万方数据