预制框架板式减振轨道减振特性分析  

Analysis of vibration reduction characteristics of a prefabricated frame plate type vibration reducing track

作　　者：贺天龙 He Tianlong

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《现代城市轨道交通》2023年第12期74-78,共5页Modern Urban Transit

基　　金：中铁第一勘察设计院集团有限公司科研课题(2022KY08ZD(CYH)-05)。

摘　　要：文章通过建立列车-轨道-基底系统空间振动分析模型,对一种可工厂化、标准化的预制框架板式减振轨道进行分析,研究不同道床板密度及减振垫刚度对此结构系统减振效果的影响。结论如下:(1)减振效果随着道床板密度的增加而增大,但减振效果提高有限,道床板密度宜取值2500~2600kg/m3;(2)不同减振垫刚度条件下,在25Hz以上频段装配该预制框架板式轨道减振效果好,减振效果最大值出现在中心频率63Hz处;(3)调整减振垫刚度可实现10dB及以下减振效果的分级调整。Through the establishment of a spatial vibration analysis model of the train-rail-substrate system,this article analyzes a prefabricated frame plate vibration damping track which could be factorymade and standardized and studies the influence of the vibration damping effect of this structural system with different densities of track bed plate and damping pad stiffness.The conclusions are as follows:(1)The vibration damping effect increases with the increase of track bed plate density,but the vibration damping effect is limited,and it is appropriate to take the value of 2500-2600 kg/m~3 for track bed plate density;(2)For different damping pad stiffness,the vibration damping effect of this prefabricated frame-plate track is good when assembled in the band of more than 25 Hz,and the maximum vibration damping effect occurs in the centre frequency of 63 Hz;(3)Adjusting the damping pad stiffness can achieve the graded vibration damping effect of 10 dB and below.

关 键 词：城市轨道交通 预制框架板式轨道 1/3倍频程 减振垫 插入损失 减振效果 

分 类 号：U213.2[交通运输工程—道路与铁道工程]