计及风沙流影响的接触线振动响应研究  

Study on vibration responses of contact wire with the impact of wind sand flow

作　　者：王圣昆 刘明光[2] 李光泽[3] 王诗月 齐飞 王昕[2] WANG Shengkun;LIU Mingguang;LI Guangze;WANG Shiyue;QI Fei;WANG Xin(China Railway Design Corporation,Tianjing 300142,China;School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;Lanzhou Railway Bureau,Lanzhou 730000,China)

机构地区：[1]中国铁路设计集团有限公司,天津300142 [2]北京交通大学电气工程学院,北京100044 [3]兰州铁路局,甘肃兰州730000

出　　处：《铁道科学与工程学报》2018年第9期2335-2342,共8页Journal of Railway Science and Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(2015JBM085)

摘　　要：基于风沙荷载的协同激励会加剧接触线的摆动幅度、增大事故发生概率,为了加深对接触网风沙荷载致振机理的认识,利用有限元软件ANSYS建立兰新高铁接触网模型,采用谐波叠加法模拟脉动风场,通过流体力学软件Fluent获得接触线气动系数并计算风沙荷载,仿真分析风沙流对接触线振动的影响。研究结果表明:风沙流作用下接触线气动系数随攻角的变化趋势与净风基本一致;接触线横向、垂向振动位移随携沙量的增大而变大,风速20 m/s攻角0°沙粒体积分数取0.000 100时,横向、垂向最大振动位移分别比净风增大21.9%和12.0%;接触线的横向、垂向振动位移增长率与沙粒体积分数之间均符合高度线性相关关系,相关系数都近似等于1。The cooperative excitation of wind and sand load can intensify the fluctuation amplitude of contact wire and increase the probability of the accident.In order to deepen the understanding of the vibration mechanism when the wind and sand load act on the catenary,the catenary model of Lan-Xin high speed railway was established with the finite element software ANSYS.The weighted amplitude wave superposition method was adopted to simulate the fluctuating wind field.The load of wind and sand was calculated by the aerodynamic parameters of the contact wire which was obtained by the computational fluid dynamics software Fluent.The influence of wind sand flow on the vibration of contact line was analyzed by simulation.The results showed that the variation of aerodynamic parameters of contact wire under the action of wind sand flow was consistent with pure wind along with the change of attack angles;the transverse and vertical displacements of the contact line become larger with the increase of sand carrying capacity.In the case of 20 m/s wind speed and 0°attack angle,when the volume fraction of sand grains is 0.000 100,the transverse and vertical maximum vibration displacements are increased by 21.9%and 12.0%,respectively,compared with the pure wind.The relationship between the growth rate of transverse and vertical vibration displacements and the sand volume fraction is highly linear,and the correlation coefficients are approximately equal to 1.

关 键 词：风沙流 接触线 气动系数 风振响应 有限元 

分 类 号：U225.7[交通运输工程—道路与铁道工程]