U型梁上减振垫浮置板轨道系统动力分析

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英文篇名：Dynamic Analysis of Damping Mat Floating Track System on U-beam 作者：杨文茂 ; 辛涛 ; 周华龙 ; 霍磊 英文作者：YANG Wenmao;XIN Tao;ZHOU Hualong;HUO Lei;China Railway Eryuan Engineering Group Co.Ltd;Beijing Jiaotong University; 关键词：减振垫浮置板轨道 ; U型梁 ; 车辆-轨道-桥梁耦合动力学模型 ; 共振 ; 减振效果 英文关键词：damping mat floating track;;U-beam;;vehicle-track-bridge coupling dynamic model;;resonance;;damping effect 中文刊名：TDGC 英文刊名：Journal of Railway Engineering Society 机构：中铁二院工程集团有限责任公司;北京交通大学; 出版日期：2019-02-15 出版单位：铁道工程学报 年：2019 期：v.36;No.245 基金：国家自然科学基金项目(51678047);; 道路与铁道工程安全保障省部共建教育部重点实验室(石家庄铁道大学)开放课题(STKF201716) 语种：中文; 页：TDGC201902009 页数：5 CN：02 ISSN：11-3567/U 分类号：47-51

摘要

研究目的:深圳地铁6号线是首条全高架采用"U型梁+减振垫浮置板轨道"系统的地铁快线,为检验是否存在系统共振,考察行车安全性指标和桥梁结构振动情况,本文通过建立车-轨-桥耦合动力学模型,对系统固有频率以及车辆、轨道、桥梁动力特性进行研究,以期指导深圳地铁6号线桥梁、轨道结构设计实践。研究结论:(1) U型梁与减振垫浮置板轨道自振频率相差较大,二者发生低阶共振的可能性较小;(2) U型梁上采用减振垫浮置板轨道以后,行车安全性指标、轨道及桥梁动力学指标均满足规范要求;(3)减振垫浮置板轨道系统可降低桥梁结构振动5～8 d B;(4)本文所采用的系统动力检算方法,既验证了"U型梁+减振垫浮置板轨道"设计方案的合理性,同时也对国内地铁高架线减振设计具有一定的指导意义。
        Research purposes: Shenzhen Metro Line 6 is the first express metro line adopting " U-beam + damping mat floating track " system. In order to check resonance possibilities and assess running safety index and bridge vibration,a vehicle-track-bridge coupling dynamic model is established to study the dynamic characteristics of vehicle,track and bridge. Research results are used to guide the bridge and track design of Shenzhen Metro Line 6.Research conclusions:( 1) Many differences of natural frequencies between U-beam and damping mat floating track can be observed,which indicates that the low-order resonance between bridge and track is unlikely.( 2) Running safety indicators, track dynamic indicators and bridge dynamic indicators all meet specifications requirements.( 3) Bridge vibration can be reduced by 5 ～ 8 d B due to the floating track system.( 4) The system dynamic checking method adopted in this paper not only verifies the rationality of the design of " U-beam + damping mat floating track" system,but also has certain guiding significance for the damping design of elevated metro lines.

引文

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