脉动风作用下近距离并列拉索风场数值模拟  

Numerical simulation of wind field near parallel cables with pulsating wind

作　　者：孙亭亭[1,2] 黄鹤[3] 杨吉新[2] 黎建华 周兴宇 SUN Ting-ting;HUANG He;YANG Ji-xin;LI Jian-hua;ZHOU Xing-yu(Architectural Engineering Department,Anqing Vocational&Technical College,Anqing 246003,China;School of Transportation,Wuhan University of Technology,Wuhan 430063,China;CCCC Second Highway Consultant Co.,Ltd.,Wuhan 430052,China;CCCC Second Harbor Consultants Co.,Ltd.,Wuhan 430060,China;Central and Southern China Municipal Engineering Design&Research Institute Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]安庆职业技术学院建筑工程系,安庆246003 [2]武汉理工大学交通学院,武汉430063 [3]中交第二公路勘察设计研究院有限公司,武汉430052 [4]中交第二航务工程勘察设计院有限公司,武汉430060 [5]中国市政工程中南设计研究总院有限公司,武汉430010

出　　处：《青岛理工大学学报》2019年第4期34-38,50,共6页Journal of Qingdao University of Technology

基　　金：国家高技术研究发展计划(863)项目(2007AA11Z107);安徽省高校自然科学研究项目(KJ2016A448;KJ2016A450;KJ2017A787)

摘　　要：为了研究近距离并列拉索在风荷载作用下的相互作用机理,利用Matlab数值分析软件模拟脉动风速谱,将模拟的结果导入流体力学计算软件Fluent中,采用RNG k-ε湍流模型,对并列拉索3种不同高度处流场分布进行数值分析.研究结果表明:拉索迎风面风压力随着高度增加而不断增大,呈现一定的规律性;上游拉索两侧产生的剪切流会沿着轴线向下并在后端产生涡流,涡流在两索之间的空隙中不断交替产生,使得下游拉索受力情况变得复杂;下游拉索极易出现涡激振动,且随高度增加,流场分布更加紊乱.In order to study the interaction mechanism of the parallel cables under wind load,the pulsating wind speed spectrum was simulated using Matlab numerical analysis software.The simulation results were imported into the fluid dynamics software Fluent.The RNG k-εturbulence model was used to carry out numerical analysis of the flow field distribution at three different heights of the parallel cables.The research results show a certain regularity that the windward wind pressure of cable increases with increasing height.The shear flow generated on both sides of the upstream cable is downward along the axis and generates vortex currents at the rear end,and the vortex is continuously and alternately generated in the gap between the two cables,which makes the stress situation of the downstream cable become more complicated.The downstream cable is prone to vortex-induced vibration,and the distribution of flow field is more turbulent with the increase of the height.

关 键 词：风荷载 RNG k-ε模型 数值模拟 并列拉索 涡激振动 

分 类 号：U441.2[建筑科学—桥梁与隧道工程] O368[交通运输工程—道路与铁道工程]