华东交通大学学报2024，Vol.41Issue(3)：29-36,8.
CRTS Ⅲ型板和双块式无砟轨道振动噪声特性研究
Investigation of Vibration and Noise Characteristics in CRTS Ⅲ Plate and Double-block Ballastless Track
摘要
Abstract
[Objective]In order to explore the structural vibration and noise characteristics of high-speed railway CRTS Ⅲ type plates and double block tracks.[Method]Based on the method of finite element,multi-body dy-namics and boundary element,the dynamic model and boundary element model of high-speed train-ballastless track-box girder coupling system are established to study the structural dynamic response and noise radiation characteristics of the train-track-box girder coupling system.[Result]The results show that the maximum wheel load reduction rate of the train is 0.053 6 and 0.165 7,and the deflection of the lower box girder is 1/9 673 and 1/8 457,respectively,when the train passes the CRTS Ⅲ plate and the double-block track structure section on the bridge.Compared with the double-block ballastless track,the displacement response of the track plate and the base of the CRTS Ⅲ plate is smaller,and the vertical vibration attenuation of the track-box girder system is faster,and the vibration damping performance is better.In addition,the total sound pressure level of the box gird-er noise of CRTS Ⅲ segment is lower than that of the two types of track structure.However,the difference be-tween the peak noise of the far field point under the bridge is small,and the peak frequency is similar,both of which are about 31.5 Hz.The peak frequency under the bridge has large differences,the peak frequency of type Ⅲ board being 63 Hz,and the double block type being 20 Hz.[Conclusion]CRTS Ⅲ plate type ballastless track is more suitable for use in high-speed railway bridge sections.关键词
无砟轨道/箱梁/车-轨-桥耦合/振动/结构噪声Key words
ballastless track/box girder/vehicle-rail-bridge coupling/vibration/structural noise分类
交通工程引用本文复制引用
罗锟,王凯新,甄慧杰,陈鹏..CRTS Ⅲ型板和双块式无砟轨道振动噪声特性研究[J].华东交通大学学报,2024,41(3):29-36,8.基金项目
国家自然科学基金项目(52178424,51868023) （52178424,51868023）
江西省自然科学重点基金项目(20224ACB204018) （20224ACB204018）
江西省科技专项(20223AEI91004) （20223AEI91004）
江西省教育厅课题(GJJ2205122) （GJJ2205122）
轨道交通基础设施性能监测与保障国家重点实验室自主课题(HJGZ2023207) （HJGZ2023207）
