400 km/h高速铁路小半径曲线地段橡胶浮置板轨道参数优化研究  

Study on Optimization of Track Parameters for Rubber Floating Slab in Small Radius Curved Section of 400 km/h High-speed Railway

作　　者：臧传臻 ZANG Chuanzhen(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《高速铁路技术》2024年第1期29-34,52,共7页High Speed Railway Technology

基　　金：国家重点研发计划项目(2022YFB2603400);中国铁路设计集团有限公司科技开发课题(2021A240101,2022BXZ005)。

摘　　要：为了研究400 km/h高速铁路列车经过小半径曲线地段时的动力响应特性,建立小半径曲线地段CRH380B车辆-轨道动力学模型,结合列车实测数据验证模型的准确性,随后模拟列车以400 km/h速度通过7000 m半径曲线路段的动力响应。结果表明:(1)相较于非减振轨道地段,当橡胶浮置板轨道的减振垫铺设刚度为0.019 N/mm^(3)、0.033 N/mm^(3)、0.042 N/mm^(3)、0.1 N/mm^(3)时,轨道减振效果分别为13.4 dB、13.4 dB、12.5 dB、8.6 dB;(2)道床板厚度、减振垫刚度的建议取值分别为300 mm、0.03 N/mm^(3)。研究成果可为400 km/h高速铁路橡胶浮置板轨道结构设计提供理论依据。In order to study the dynamic response characteristics of 400 km/h high-speed train when passing through a small radius curve,a vehicle-track dynamics model of the CRH380B train on section with small radius curve was established.The model’s accuracy was verified with actual measured data from the train.Subsequently,simulations were conducted to predict the dynamic response of the train while traversing a curve with a 7000 m radius at the speed of 400 km/h.The results showed that:(1)Compared to a track section without damping,the vibration reduction effect of the rubber floating slab track with damping pads at stiffness levels of 0.019 N/mm^(3),0.033 N/mm^(3),0.042 N/mm^(3),and 0.1 N/mm^(3) were 13.4 dB,13.4 dB,12.5 dB,and 8.6 dB,respectively.(2)The recommended values for the slab thickness and damping pad stiffness are 300 mm and 0.03 N/mm^(3),respectively.The conclusions provide a theoretical basis for the design of rubber floating slab track structures for 400 km/h high-speed railways.

关 键 词：高速铁路 橡胶浮置板轨道 小半径曲线 插入损失 

分 类 号：U213.212[交通运输工程—道路与铁道工程]