车站减振CRTSⅢ型板式无砟轨道动力特性试验研究  

Experimental Study on Dynamic Characteristics of CRTSⅢ Vibration Reduction Slab Ballastless Track Applied in Station

作　　者：蔡小培[1] 王启好 梁延科 刘麦 CAI Xiaopei;WANG Qihao;LIANG Yanke;LIU Mai(School of Civil Engineering,Beijing Jiaotong University Beijing,100044,China;China Railway Design Corporation Tianjin,300142,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国铁路设计集团有限公司,天津300142

出　　处：《振动．测试与诊断》2023年第5期930-937,1038,1039,共10页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(52178405);中国铁路总公司科技研究开发计划课题资助项目(N2018G071)。

摘　　要：为研究京雄城际铁路雄安站减振CRTSⅢ型板式无砟轨道的减振特性,进行了橡胶材料试验、落轴试验及现场行车试验。从轨道理论减振性能、轨道内部振动分布规律及传递机理、车站现场振动响应等多维度,依据橡胶硬度、加速度时频特性、振动插入损失及候车厅振级等指标,研究了减振无砟轨道的作用机理及振动控制效果。结果表明:减振CRTSⅢ型板式轨道采用的橡胶减振垫在室温下平均硬度为48.5,理论上可实现对35.65 Hz以上振动的控制;落轴引起的振动在减振无砟轨道结构中自上至下传递时高频分量衰减迅速,随着与落轴点距离的增大,轨道振动先减小后增大;相比普通无砟轨道,减振无砟轨道的底座板振动插入损失接近10 dB;采用减振CRTSⅢ型板式轨道,能有效控制列车过站时引起的车站振动。In order to study the vibration reduction characteristics of CRTSⅢ vibration reduction slab ballastless track at Xiong′an station of Beijing-Xiong′an intercity railway,three tests are carried out,including rubber material test,axle drop test and field driving test.From the multi-dimensional aspects of theoretical vibration reduction performance,internal vibration distribution law,transmission mechanism inside track,field vibration response of station,and according to rubber hardness,acceleration time-frequency characteristics,vibration insertion loss,station vibration level and other indicators,the mechanism and vibration control effect of CRTSⅢ vibration reduction slab ballastless track are studied.The results show that the average hardness of the rubber pad used for CRTSⅢ vibration reduction slab ballastless track is 48.5 at room temperature,and the vibration above 35.65 Hz can be theoretically controlled.When the vibration caused by axle drop is transmitted from top to bottom in the track structure,the high-frequency component decays rapidly.With the distance from the axle drop point,the track vibration first decreases and then increases.Compared with common ballastless track,the vibra-tion insertion loss for base plate of CRTSⅢ vibration reduction slab ballastless track is close to 10 dB.The CRTSⅢ vibration reduction slab ballastless track can effectively control the station vibration caused by train passing.

关 键 词：车站振动 减振无砟轨道 橡胶硬度 落轴试验 现场行车测试 

分 类 号：U213.21[交通运输工程—道路与铁道工程] X593[环境科学与工程—环境工程] TH113.1[机械工程—机械设计及理论]