不同风攻角下风屏障对桥面车辆气动力的影响  

Influence of wind barriers on aerodynamic forces of vehicles on bridge decks at different wind attack angles

作　　者：林钟毓 李明 张海程[1] 张昊 李明水 LIN Zhongyu;LI Ming;ZHANG Haicheng;ZHANG Hao;LI Mingshui(Research Center of Wind Engineering,Southwest Jiaotong University,Chengdu 610031,China;Wind Engineering Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学风工程试验研究中心,成都610031 [2]西南交通大学风工程四川省重点实验室,成都610031

出　　处：《东南大学学报(自然科学版)》2025年第1期154-160,共7页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52178508,52308530);中央高校基本科研业务费专项资金科技创新资助项目(A0920502052401-215)。

摘　　要：为了研究不同风攻角下风屏障对桥面迎风侧不同车道上车辆气动力的影响,通过1∶30大尺度节段模型测力风洞试验测量了±5°、±3°和0°风攻角下厢式货车在装有栏杆桥面和风屏障桥面上的气动力,并借助数值模拟方法得到的桥面局部风环境分析了车辆气动力随风攻角变化的机理。研究结果表明:对于设置栏杆的桥面,车辆侧力、升力和倾覆力矩系数最大值均不在0°风攻角时出现,且车道2位置车辆的气动力对风攻角变化非常敏感;桥面设置风屏障时,其平均风速场受风攻角变化的影响很小,尤其在风攻角不为负时,桥面中央位置处车辆受到的气动三分力几乎不变。在风屏障顶部形成的风速加速区会增加高侧边车辆受到的倾覆力矩,使其更容易发生侧倾事故。To study the influence of the wind barriers on the aerodynamic forces of vehicles under different wind angles of attack,the aerodynamic forces of van-type trucks on the bridge deck equipped with railings and wind barriers under±5°,±3°and 0°wind angles of attack were measured by 1∶30 large-scale segmental model force measurement wind tunnel test.The wind environment above the bridge deck was conducted by numerical simulation to analyze the mechanism of vehicle aerodynamic force change with wind attack angles.The study results show that for the deck with common parapets,the maximum values of side force,lift force and over-turning moment coefficients of vehicles do not occur at 0°wind angle of attack.Furthermore,the aerodynamic forces of vehicles in Lane 2 are susceptible to changes in the angles of attack.When the bridge deck is equipped with wind barriers,the mean wind velocity field is very little affected by the change of wind angle of attack,especially when the wind angle of attack is not negative,the aerodynamic three-component force on the vehicle at the center of the bridge deck is almost constant.It is worth noting that the acceleration region of wind speed formed at the top of the wind barrier can increase the aerodynamic rolling moment of high-sided ve-hicles.This increase can make it more likely for vehicles to rollover.

关 键 词：风攻角 风屏障 行车安全 风洞试验 数值模拟 

分 类 号：U461.91[机械工程—车辆工程]