摘要
随着城市轨道交通快线和市郊铁路的发展,列车车速可提至160 km/h.车速提升对浮置板轨道减振性能和动力响应均会产生影响.为了研究不同车速下钢弹簧浮置板轨道的减振降噪性能,在国家铁道试验中心环形试验线设计建造了一段200 m长的浮置板轨道试验段.选取钢弹簧浮置板轨道和普通整体道床共3个断面开展不同车速下轨道减振降噪效果和动力性能试验研究.试验过程中,列车由60 km/h逐级提速至160 km/h.研究结果表明:随着列车速度的增加,浮置板道床位移逐渐减小,外轨位移逐渐增大,内轨位移逐渐减小,钢轨和道床位移在各速度级条件下均满足规范要求;“2/3布置”钢弹簧浮置板道床位移大于“2/2布置”钢弹簧浮置板道床.随着列车速度的增加,浮置板减振效果呈现出先增大后略微减小的趋势,100 km/h以上时浮置板减振效果均大于10 dB;相比于普通整体道床,钢弹簧浮置板具有一定的降噪效果,最大值可达3.7 dB(A).
With the development of urban rail transit express and suburban railway lines, the operating train speed can reach 160 km/h. The increase in train speed can affect the vibration damping performance and dynamic responses of the Floating Slab Track(FST). To investigate the vibration and noise reduction of steel-spring FST under different train speeds, a 200 m test section of steel-spring FST is designed and constructed in the circle test line of the National Railway Test Center. Three test sections of steel-spring FST and regular slab track are selected to carry out the experimental research on vibration and noise reduction effect and dynamic performance of track under different train speeds. During the test,the train speed increases from 60 to 160 km/h step by step. The results indicate that with the increase of train speed, the displacement of FST gradually decreases, the displacement of outer rail gradually increases, the displacement of inner rail gradually decreases, and the displacement of rail and slab meet the specification requirements under all train speeds. The displacement of a “2/3 arrangement” steel-spring FST is greater than that of the “2/2 arrangement” one. With the increase of train speed, the vibration damping effect of steel-spring FST increases first and then decreases slightly. When the speed is larger than 100 km/h, the vibration damping effect is higher than 10 dB. Compared with regular slab track, a noise reduction effect with the maximum value of 3.7 dB(A) can be obtained by using FST.
作者
丁德云
王文斌
马蒙
闫宇智
李腾
吴宗臻
DING Deyun;WANG Wenbin;MA Meng;YAN Yuzhi;LI Teng;WU Zongzhen(Beijing Jiuzhouyigui Environmental Technology Co.,Ltd.,Beijing 100071,China;Urban Rail Transit Centre,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;School of Civil Engineering,Bei-jing Jiaotong University,Beijing 100044,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2022年第6期144-151,共8页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金(51508022)
北京市科学技术协会中小企业优秀技术成果转化培育项目(ZH202201050020)。
关键词
铁道工程
钢弹簧浮置板轨道
车速
试验研究
动力特性
减振效果
railway engineering
steel-spring floating slab track
train speed
experimental study
dynamic behavior
vibration damping effect
