中低速磁浮轨道-桥梁系统竖向振动传递特性研究

李小珍,谢昆佑,王党雄,朱艳

振动与冲击 ›› 2019, Vol. 38 ›› Issue (14) : 105-111.

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (14) : 105-111.
论文

中低速磁浮轨道-桥梁系统竖向振动传递特性研究

  • 李小珍,谢昆佑,王党雄,朱艳
作者信息 +

Vertical vibration transfer characteristics of medium-low speed maglev rail-bridge systems

  • LI Xiaozhen,XIE Kunyou,WANG Dangxiong,ZHU Yan
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文章历史 +

摘要

中低速磁浮交通作为一种新兴的交通方式,其轨道结构形式与传统轮轨交通的轨道有较大的区别。为了研究中低速磁浮交通线路中轨道-桥梁系统竖向振动特性,基于某中低速磁浮试验线,以20m预应力混凝土简支梁为研究对象,建立轨道-桥梁系统竖向振动传递有限元模型并进行振动传递特性分析,随后探讨了激励位置,扣件竖向刚度,轨枕间距对系统竖向振动传递特性的影响。研究表明:系统的位移导纳存在两个峰值,频率分别对应为系统的整体一阶竖弯和F轨的局部一阶竖弯;随着考察点与荷载激励点距离的增大,在F轨局部一阶竖弯频率之后,F轨的位移导纳幅值变化不显著;激励位于扣件处时,在100-200Hz间F轨的位移导纳振动幅值要大于激励位于非扣件处时;扣件刚度和轨枕间距均会影响轨道结构的局部刚度,从而影响F轨的局部一阶竖弯频率值和在此频率点处的F轨位移导纳幅值;F轨的局部变形较明显,建议在后续的时域磁浮车桥耦合振动模型中应考虑F轨的影响。

Abstract

As a new mode of traffic, the track structure form of the medium-low speed maglev traffics is different from that of traditional wheel-rail traffics.In order to study its vertical vibration characteristics, based on a medium-low speed maglev test line, a twenty-meter prestressed concrete simply supported beam was taken as the research object.The finite element model for the vertical vibration transmission of the rail-bridge system was established and the vibration transmission characteristics were analyzed.Then, the influence of force location, vertical fastener stiffness and sleeper pitch on vertical vibration transmission characteristics of the rail-bridge system were discussed.The research results show that the displacement admittance of the system has two peak frequencies.These two peak frequencies correspond to the overall first-order vertical bending of the system and the local first-order vertical bending of the F-rail, respectively.With the increase of the distance between the inspection site and the load excitation point, the amplitude of the displacement admittance of the F-rail does not change significantly after the first-order vertical bending frequency of the F-rail.When the excitation is located at the fastener, the amplitude of the displacement vibration of the F-rail in the frequency range of 100—200 Hz is greater than that of the excitation at the non-fastener.The stiffness of the fastener and the distance between sleepers affect the local stiffness of the track structure, thus affect the local first-order vertical bending frequency of the F-rail and the displacement admittance amplitude of the F-rail at this frequency point.The local deformation of F-rail is significant.It is suggested that the effect of F-rail should be considered in the following research of a coupled maglev vehicle-bridge vibration model in time domain.

关键词

中低速磁浮交通 / F轨 / 轨道梁 / 竖向振动传递 / 位移导纳

Key words

medium-low speed maglev traffic / F-rail / girder / vertical vibration transmission / displacement admittance

引用本文

导出引用
李小珍,谢昆佑,王党雄,朱艳. 中低速磁浮轨道-桥梁系统竖向振动传递特性研究[J]. 振动与冲击, 2019, 38(14): 105-111
LI Xiaozhen,XIE Kunyou,WANG Dangxiong,ZHU Yan. Vertical vibration transfer characteristics of medium-low speed maglev rail-bridge systems[J]. Journal of Vibration and Shock, 2019, 38(14): 105-111

参考文献

[1]  Li X Z, Zhang X, Zhang Z J, et al. Experimental research on noise emanating from concrete box–girder bridges on intercity railway lines [J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2015, 229(2): 125–135.
[2]  Li Q, Wu D J. Analysis of the dominant vibration frequencies of rail bridges for structure–borne noise using a power flow method [J]. Journal of Sound and Vibration, 2013, 332(18): 4153–4163.
[3] 赵春发. 磁悬浮车辆系统动力学研究[D]. 成都:西南交通大学,2009.
[4] 邹振民. 新世纪城市理想的交通工具——介绍日本HSST磁悬浮列车系统[J]. 铁道通信信号,2001, 37(11): 37-39.
[5] 张庆福. 磁浮连续轨道梁温度变形及对振动的影响[D]. 上海:上海交通大学,2009.
[6] 鲍  佳. 磁浮列车悬浮控制与动力学仿真[D]. 成都:西南交通大学,2003.
[7] 邓小星. 中低速磁浮车辆系统动力学性能研究[D]. 成都:西南交通大学,2009.
[8] Lee J S, Soon D K, Kim M Y, et al. A Parametric study on the dynamics of urban transit maglev vehicle running on flexible guide-way bridges [J].Journal of Sound and Vibration. 2009, 328(3): 301-317.
[9] 李小珍,洪沁烨,耿  杰 等. 中低速磁浮列车-轨道梁竖向耦合模型与验证[J]. 铁道工程学报,2015, 32(9):103-108.
LI Xiao-zhen, HONG Qin-ye, GENG Jie et al. The medium and low speed maglev train-track beam coupling vibration model and verification [J]. Journal of Railway Engineering Society, 2015, 32(9): 103-108.
[10] 李小珍,王党雄,耿杰 等. F轨对中低速磁浮列车-桥梁系统竖向耦合振动的影响研究 [J]. 土木工程学报,2017,50(4):97-106.
LI Xiao-zhen, WANG Dang-xiong, GENG Jie, et al. Study on the influence of F-rail in vertical coupling vibration of low-medium speed maglev train-bridge system[J]. China Civil Engineering Journal, 2017, 50(4): 97-106.
[11] 翟婉明, 赵春发. 磁浮车辆/轨道系统动力学(Ⅰ) ---- 磁/轨相互作用及稳定性[J]. 机械工程学报, 2005,41(7): 1-10.
    ZHAI Wan-ming, ZHAO Chun-fa. Dynamics of maglev vehicle/guideway systems (Ⅰ) ----magnet/rail interaction and system stability[J]. Chinese Journal of Mechanical Engineering, 2005, 41(7): 1-10.
[12] 翟婉明, 赵春发. 磁浮车辆/轨道系统动力学(Ⅱ) ---- 建模与仿真[J]. 机械工程学报, 2005,41(8): 163-175.
ZHAI Wan-ming, ZHAO Chun-fa. Dynamics of maglev vehicle/guideway systems (Ⅱ) ---- modeling and simulation [J]. Chinese Journal of Mechanical Engineering, 2005, 41(8): 163-175.
[13] 单春胜. 中低速磁浮列车-桥梁系统竖向耦合振动研究[D]. 成都:西南交通大学, 2014.
[14] Yau J D. Aerodynamic vibrations of a maglev vehicle running on flexible guideways under oncoming wind actions [J]. Journal of Sound and Vibration. 2009, 329(10):1743-1759.
[15] Soon D K, Lee J S, Moon J W, et al. Dynamic interaction analysis of urban transit maglev vehicle and guideway suspension bridge subjected to gusty wind [J].Engineering Structure. 2008, 30(12): 3445-3456.
[16] 罗  锟,雷晓燕,曾少辉. 无砟轨道-箱梁结构振动传递及参数影响分析[J]. 噪声与振动控制,2016, 36(6):126-130.
LUO Kun, LEI Xiao-yan, ZENG shao-hui. Parameter analysis of vibration transmission of ballastless track and box-girder bridge systems [J]. Noise and Vibration Control, 2016, 36(6):126-130.
[17] Zhao C F, Zhai W M. Maglev vehicle/guideway vertical random response and ride quality [J]. Vehicle System Dynamics. 2002; 38(3): 185-210.
[18] Wu T X,Thompson D J.Vibration analysis of railway track with multiple wheels on the rail [J]. Journal of Sound and Vibration, 2001, 239(1): 69-91.

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