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高速铁路连续梁桥的共振响应与振动控制研究
The Study on Resonance Response and Vibration Control of High Speed Railway Continuous Beam Bridge
投稿时间:2018-05-13  修订日期:2018-06-29
DOI:
中文关键词:  连续梁桥  共振响应  振动控制  高速铁路
英文关键词:Continuous beam bridge  Resonance response  Vibration control  High-speed railway
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
李锦华 华东交通大学土木建筑学院 jinhuali@foxmail.com 
管海平 华东交通大学土木建筑学院  
李春祥 上海大学 土木工程系 Li-chunxiang@vip.sina.com 
张焕涛 华东交通大学土木建筑学院  
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中文摘要:
      本文以液体粘滞阻尼器作为振动控制外部装置,主桥采用欧拉伯努利梁进行模拟,通过中国和谐号动车组CRH380AL、日本新干线Shinkansen700和欧洲高速列车HSLMA8三种不同类型的高速列车,研究分析了高速列车作用下桥梁结构共振响应的影响因素,以及粘滞阻尼器的阻尼系数与安装位置对桥梁结构振动响应的减振效果。研究结果表明:(1)通过合理有效的布置列车荷载轴距,可使桥梁结构发生基频共振的列车时速在运营时速之外,避免了桥梁结构发生较大振动峰值响应,即桥梁结构的基频共振;(2)随着粘滞阻尼器的阻尼系数的增大,桥梁的加速度峰值响在列车不同时速下均在减少,对桥梁振动有着不同程度的减振效果;(3)通过合理安置液体粘滞阻尼器,可有效降低高速列车作用下的桥梁结构的共振响应;(4)随着粘滞阻尼器与主梁的连接点位置逐渐远离支座,粘滞阻尼器的减振效果越明显;(5)随着粘滞阻尼器与桥台的连接点位置逐渐靠近支座,粘滞阻尼器的减振效果略有提升,但不明显。
英文摘要:
      In this paper, a fluid viscous damper is used as an external device for vibration control. The main bridge is simulated by the Euler Bernoulli Beam. The factors affecting the resonance response of bridge structure under the action of high speed trains are studied through three types of CRH380AL, Shinkansen700 and HSLMA8. As well as the vibration reduction effect of viscous damper coefficient and placement position on the vibration response of bridge structure are studied. The results show that: (1) Through reasonable and effective arrangement of train load wheelbase, the train speed of fundamental frequency resonance of bridge structure can be kept out of operating speed, which avoids the great vibration peak response of bridge structure, that is, the fundamental frequency resonance of bridge structure. (2) With the increase of the damping coefficient of the viscous damper, the peak acceleration of the bridge is decreasing at different speeds of the train, and the vibration of bridge has different degree of vibration reduction effect. (3) The resonance response of bridge structure under high speed train can be effectively reduced through the rational placement of liquid viscous damper. (4) The damping effect of viscous damper becomes more obvious as the connection point of viscous damper and main beam gradually gets away from the support. (5) As the connection point between the viscous damper and the abutment gradually near the support, the vibration reduction effect of the viscous damper slightly improved, but it is not obvious.
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