环境敏感区桥上有砟轨道铺设道砟垫的减振效果

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (10) : 38-44.

论文

谭诗宇，蔡小培，崔日新，井国庆

作者信息 +

Vibration Reduction Effect of Laying Ballast Mat under Ballast Track on Bridge in Environmental Sensitive Area

Tan Shi-yu，CAI Xiao-pei，CUI Ri-xin，JING Guo-qing

Author information +

文章历史 +

摘要

为了给环境敏感区桥梁地段有砟轨道的减振设计提供理论依据，采用有限元方法建立了车辆-有砟轨道-桥梁空间耦合动力学模型。基于所建立的动力学模型，计算分析了铺设道砟垫对轨道结构和桥梁动力响应时频特性的影响，并对道砟垫的合理刚度进行探讨。计算结果表明：桥上有砟轨道采用道砟垫的减振效果明显，桥梁结构的动力响应显著减小，其中桥墩振动减小3～9 dB；铺设道砟垫不会加剧轮轨动力作用和影响行车安全，而且还有利于降低轨道结构的振动，其中以道床的振动减小最为显著；从保证减振效果、控制道床加速度以及道砟垫压缩量等角度综合考虑，建议道砟垫的合理面刚度取值为100～150 MPa/m。

Abstract

In order to provide a theoretical basis for the vibration reduction design of ballast track on bridge in environment sensitive area, a spatial coupling dynamical model for a vehicle-ballast track-bridge system was established based on the finite element method. Based on the model, time-frequency characteristics of dynamic responses of track and bridge with and without laying ballast mat were analyzed. In addition, the proper rigidity value of the ballast mat was investigated. The results show that the ballast mat can provide obvious vibration absorption effect that the dynamic responses of bridge evidently decreased, where the vibration level of pier can be decreased with 3～9dB. And the adoption of the ballast mat does not aggravate wheel-rail dynamic interaction or affect the running safety of trains. Furthermore, vibration of track structures also can be decreased, especially for the ballast bed. Proper rigidity value of ballast mat is suggested to be from 100 to 150 MPa/m with the comprehensive consideration of vibration absorption effect, ballast bed acceleration and compression of ballast mat.

导出引用

谭诗宇，蔡小培，崔日新，井国庆. 环境敏感区桥上有砟轨道铺设道砟垫的减振效果[J]. 振动与冲击, 2017, 36(10): 38-44

Tan Shi-yu，CAI Xiao-pei，CUI Ri-xin，JING Guo-qing. Vibration Reduction Effect of Laying Ballast Mat under Ballast Track on Bridge in Environmental Sensitive Area[J]. Journal of Vibration and Shock, 2017, 36(10): 38-44

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