大跨桥梁行车振动测试与舒适性分析

李枝军;吴晓超;徐秀丽;李雪红

振动与冲击 ›› 2014, Vol. 33 ›› Issue (21) : 213-217.

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (21) : 213-217.
论文

大跨桥梁行车振动测试与舒适性分析

  • 李枝军,吴晓超,徐秀丽,李雪红
作者信息 +

Analysis of vibration and riding comfort of the long span bridge

  • Li zhijun,WU Xiaochao,Xu xiuli,Li xuehong
Author information +
文章历史 +

摘要

为研究大跨桥梁行车振动舒适性,对5座不同环境下的大跨桥梁行车内部振动进行了现场实测,基于实测数据分析了车辆动力特性、桥面动力特性、桥面不平整度以及车速等对行车振动的影响,此基础上对车辆行车振动舒适性进行了分析。通过采用小波变换的方法对车辆内部振动信号的时频域分布规律进行分析可以发现车辆内部振动信号的能量分布:在竖向受车辆动力特性的影响较大,在横向受桥面动力特性影响较大。桥面不平整度和伸缩缝对行车内部振动的幅值影响较大。行车内部竖向振动随着车速的增加而增大;对于风速较大的跨海大桥,当车速超过80km/h时,行车内部横向振动急剧增大。研究成果为合理评价大型桥梁行车振动舒适性具有重要的参考价值。

Abstract

To study the ride comfort of the long span bridge, five tests of vibration for vehicle passing the bridge in different condition were conducted. The effect of the dynamic characters of the vehicle and the bridge, the roughness of the deck and the vehicle speed on the vibration inside vehicle was investigated by analyzing measured vibration data. A time frequency domain method based on wavelet transform was used to extract the energy distribution of vibration inside the vehicle The results show that the dynamic characters of the vehicle have more influence on vertical vibration inside the vehicle. However the dynamic characters of the bridge deck have more influence on lateral vibration inside the vehicle. The vibration amplitude is mainly determined by the roughness and the expansion joint and increase with the vehicle speed. The lateral vibration of the vehicle passing the Cross Sea Bridge has a rapid increase as the vehicle speed exceed 80km/h. The research results have important reference value in evaluating ride vibration comfort of long-span Bridge.


关键词

大跨桥梁 行车振动 现场测试 时频域分析 行车舒适性

Key words

long span bridge / riding vibration / vibration measurement / time frequency domain / ride comfort

引用本文

导出引用
李枝军;吴晓超;徐秀丽;李雪红. 大跨桥梁行车振动测试与舒适性分析[J]. 振动与冲击, 2014, 33(21): 213-217
Li zhijun;WU Xiaochao;Xu xiuli;Li xuehong. Analysis of vibration and riding comfort of the long span bridge[J]. Journal of Vibration and Shock, 2014, 33(21): 213-217

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