东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

地铁浮轨式扣件减振效果的测试与分析

ISSN号：1006-2106
期刊名称：《铁道工程学报》
时间：0
分类：U213.11[交通运输工程—道路与铁道工程]
作者机构：西南交通大学高速铁路线路工程教育部重点实验室,成都610031
相关基金：国家自然科学基金面上项目（51578468）;国家自然科学基金高铁联合基金项目（U1434201,U1234201）; 国家杰出青年科学基金项目（51425804）; 四川省科技支撑计划项目（2014GZ0003）; 中央高校基本科研业务费专项资金资助（2682015CX087）

关键词：地铁, 环境振动, 减振, 浮轨式扣件, 现场试验, subway, environment vibration, vibration attenuation, rail suspension fasteners, field experiment

中文摘要：

研究目的：为治理我国地铁环境振动问题,可采用多种减振轨道结构型式。浮轨式扣件作为新型减振扣件在国内应用较少,实际减振效果尚不明确,需结合实际工程开展现场试验,为地铁减振轨道设计提供参考。研究结论：在成都地铁2号线某区间,现场实测了浮轨式扣件替换DZⅢ型扣件前后的地面竖向振动加速度,通过时域与频域实测结果的对比分析得出：（1）浮轨式扣件使地面竖向振动加速度时程曲线从若干集中的振动簇变为分散均匀的振动模式,而且地面竖向振动加速度最大峰值不足DZⅢ型扣件的50%;（2）浮轨式扣件在1/3倍频程中心频率50～160 Hz的减振效果最为显著,VLzmax振级最高降幅可达21 d B;（3）在1/3倍频程中心频率1～160 Hz范围内,浮轨式扣件工况下所有测点的VLz综合振级为57.3～68.3 d B,其中绝大部分测点的VLz综合振级低于我国《城市区域环境振动标准》中特殊住宅区的标准值65 d B;（4）该研究成果可应用于地铁减振降噪工程领域。

英文摘要：

Research purposes： In order to control subway vibration in our country,many kinds of track structures were adopted.As a new vibration-control technique,the suspension fasteners are rarely used in China,and its actual vibration-alleviating effect is still unclear.Therefore,some field tests should be carried out to facilitate design of subway track.Research conclusions： A certain section of the metro line 2 in Chengdu was chosen to test the vertical ground vibration accelerations before and after replacing rail fasteners.The test results in both time and frequency domains were compared.The compared results show that：（1） The time-domain vertical ground vibration accelerations would transform from several concentrated vibrations to the decentralized and uniform ones after replacement of the DZ Ⅲ rail fasteners with rail suspension fasteners.Besides,the time-domain peak particle accelerations caused by rail suspension fasteners is less than 50% of that caused by the DZ Ⅲ rail fasteners.（2） The vibration-reduction effect of rail suspension fasteners is more remarkable in the 1 /3 octave center frequencies of 50 ~ 160 Hz.Compared with common rail fasteners,the highest decrease of VLzmaxin the 1 /3 octave center 50 ~ 160 Hz is 21 d B.（3） The integrated VLzin 1 /3octave center frequencies of 1 ~ 160 Hz at all measuring positions are ranged from 57.3 d B to 68.3 d B,mostly less than China＇standard threshold of 65 d B,after application of rail suspension fasteners.（4） The research results can be usedin control of subway vibration and noise.

同期刊论文项目