摘要
为系统开展侧风作用下山区高墩桥梁上货运汽车的气动特性研究,通过数值模拟手段揭示不同侧风强度、不同桥梁位置、不同货车类型的气动参数变化规律。利用Catia软件完成货运汽车的精细化三维建模,还原车身尺寸、货厢形态及重心分布等关键结构特征;借助Global Mapper软件导入山区高墩桥梁所在区域的地形高程数据,结合桥梁设计图纸构建包含桥墩、桥面、周边山体的地形-桥梁模型,最终整合形成“车辆-地形-桥梁”耦合计算模型,确保模型能真实反映山区复杂地形与桥梁、车辆的空间位置关系。利用Starccm+软件进行仿真模拟。通过变化车辆位置以及侧风风速,研究静止在山区高墩桥梁上的货运汽车的气动荷载变化规律和外流场特性以及车辆的气动效应。研究表明:侧风环境下,货运汽车静止在山区高墩桥梁上时,其安全性主要受到侧向力、侧倾力矩以及横摆力矩的影响,因此货运汽车在距离桥头5、200 m时安全性相对较低。在桥梁上的相同位置,货运汽车的气动荷载随着风速的增加而增大。
To systematically study the aerodynamic characteristics of freight vehicles on high-pier bri-dges in mountainous areas under crosswind conditions,a numerical simulation method was developed to reveal the variation patterns of aerodynamic parameters under different crosswind intensities,bridge positions,and types of freight vehicles.The Catia software was used to complete the detailed three-dimensional modeling of the freight vehicle,restoring key structural features such as vehicle body size,cargo compartment shape,and center of gravity distribution.The Global Mapper software was used to import the terrain elevation data of the area where the high-pier bridges are located.Based on the bridge design drawings,a terrain-bridge model including the bridge piers,the bridge deck,and the surrounding mountains was developed.Finally,a“vehicle-topography-bridge”coupled calculation model was integrated,ensuring that the model can accurately reflect the spatial positional relationship between the complex terrain in mountainous areas and the bridges and vehicles.The results showed that in the crosswind environment,when the freight vehicle was stationary on the mountainous high-pier bridge,its safety was mainly affected by lateral forces,side-tipping moments,and yawing moments,so the safety of the freight vehicle was relatively low at a distance of 5 and 200 meters from the bridgehead.At the same position on the bridge,the aerodynamic load of the freight vehicle increased with the increase of wind speed.
作者
邵健恒
闫亚光
黄弋珍
蒋明敏
解会兵
高军
SHAO Jianheng;YAN Yaguang;HUANG Yizhen;JIANG Mingmin;XIE Huibing;GAO Jun(College of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056038,China;The Fourth Construction Co.,Ltd.of Construction Eighth Engineering Division,Qingdao,Shandong 266000,China;Hebei Baojin Expressway Co.,Ltd.,Baoding,Hebei 071000,China;Department of Civil and Architecture Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《河北工程大学学报(自然科学版)》
2025年第5期54-61,共8页
Journal of Hebei University of Engineering(Natural Science Edition)
基金
国家自然科学基金资助项目(51708020)。
关键词
山区高墩桥梁
数值模拟
气动效应
侧风作用
high pier bridges in mountainous areas
numerical simulation
aerodynamic effects
crosswind action
