大跨度钢桁梁悬索桥对风作用敏感,桥上列车周围的流场也会受到较大影响,横风作用下考虑钢桁梁影响的列车气动力的研究十分必要。以某大跨度钢桁梁悬索桥为例,首先在风洞试验室建立两种大气紊流场,其次基于测压法分析静止于钢桁梁上列车气动力,最后得到频域内列车的等效气动导纳以及抖振力的跨向相关性,且考虑了攻角、紊流场、列车位置等影响因素,也指出了进一步的研究方向,为类似桥梁上列车运行的舒适性研究提供了一定的指导。
Abstract
The flow field around trains passing through bridges may be largely affected by long-span steel truss bridges which are sensitive to wind, it is necessary to analyze aerodynamic forces on trains under crosswind considering influences of steel truss bridges. Taking a long span steel truss suspension bridge as an example, two atmospheric turbulence fields were established in a wind tunnel lab. Then, the immobile aerodynamic forces on a train were analyzed with the pressure measurement method. The equivalent aerodynamic admittances and the cross correlation of buffeting foeces in frequency domain were obtained. The influences of wind attack angle, turbulent flow field and location of train were considered and the further study direction was pointed out. This study provided a reference for studying the comfort of trains passing through similar bridges.
关键词
钢桁桥 /
列车 /
气动导纳 /
横风 /
风洞试验
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Key words
steel truss bridge /
train /
aerodynamic admittance /
crosswind /
wind tunnel test
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参考文献
[1] Baker C.J., 1991, Ground vehicles in high cross winds part I: Steady aerodynamic forces. Journal of Fluids & Structures, 5, 69–90.
[2] Baker C.J., 1991, Ground vehicles in high cross winds part II: Unsteady aerodynamic forces. Journal of Fluids & Structures, 5, 91–111.
[3] Baker C.J., 2004, Measurements of the cross wind forces on trains. Journal of Wind Engineering and Industrial Aerodynamics, 92, 547-563.
[4] Sterling, M., Baker, C., Bouferrouk, A., ONeil, H., Wood, S. and Crosbie, E., 2009. An investigation of the aerodynamic admittances and aerodynamic weighting functions of trains. Journal of Wind Engineering and Industrial Aerodynamics 97, 512-522.
[5] Cheli, F., Giappino, S., Rosa, L., Tomasini, G. and Villani, M., 2013. Experimental study on the aerodynamic forces on railway vehicles in presence of turbulence. Journal of Wind Engineering and Industrial Aerodynamics 123, 311-316.
[6] Tomasini, G. and Cheli, F., 2013. Admittance function to evaluate aerodynamic loads on vehicles: Experimental data and numerical model. Journal of Fluids and Structures 38, 92-106.
[7] 张田. 强风场中高速铁路桥梁列车运行安全性分析与防风措施研究[D].北京:北京交通大学,2013.
ZHANG tian. Study on running safety of trains and windproof measures for high-speed railway bridges in strong wind field [D].Beijing: Beijing Jiaotong University, 2013.
[8] 郭文华,张佳文,项超群. 桥梁对高速列车气动特性影响的风洞试验研究[J]. 中南大学学报(自然科学版),2015,46(8):3151-3159.
GUO wenhua, ZHANG jiawen, XIANG chaoqun. Wind tunnel test of aerodynamic characteristics of high-speed train on bridge [J]. Journal of Central South University (Science and Technology). 2015,46(8): 3151-3159.
[9] 李永乐, 廖海黎, 强士中. 车桥系统气动特性的节段模型风洞试验研究[J]. 铁道学报, 2004, 26(3): 71−75.
LI Yongle, LIAO Haili, QIANG Shizhong. Study on aerodynamic characteristics of the vehicle-bridge system by the section model wind tunnel test [J]. Journal of the China Railway Society, 2004, 26 (3): 71−75.
[10] 中华人民共和国交通部.JTG/T D60—01—2004 公路桥梁抗风设计规范[S].北京:中国交通出版社,2004.
[11] 马存明. 流线箱型桥梁断面三维气动导纳研究[D]. 成都: 西南交通大学, 2007.
Ma Cunming. 3D aerodynamic admittance response of streamlined box bridge decks [D]. Sichuan: Southwest Jiaotong University, 2007.
[12] 李丽. 桥梁气动导纳函数及其应用研究[D]. 成都:西南交通大学,2007.
LI li. Study of aerodynamic admittance function of bridge and its application [D]. Sichuan: Southwest Jiaotong University, 2007.
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