基于风洞模拟的高原积沙公路护栏选型研究  

Research on the Model Selection of Guardrails on Plateau Sand-accumulated Highway Based on Wind Tunnel Simulation

作　　者：万常兴 吕帅元 马仁跃 Wan Changxing;Lv Shuaiyuan;Ma Renyue(Amdo Highway Maintenance Section of Qinghai-Tibet Highway Branch of Tibet Autonomous Region Highway Bureau,Naqu 852000,China;Tibet university institute of technology,Lasa 850000,China)

机构地区：[1]西藏自治区公路局青藏公路分局安多公路养护段,那曲市852000 [2]西藏大学工学院,拉萨市850000

出　　处：《北方交通》2024年第5期52-56,共5页Northern Communications

摘　　要：为解决G109国道那曲至安多段路面积沙造成的行车安全问题,文章分析了2021年5月至2022年5月共103563组实测风速数据,选取平均值作为模拟参数,对三波形梁钢护栏和缆索护栏进行风洞数值模拟。模拟结果表明:气流经过波形梁钢护栏时会被面板分流,上下边缘处的风速分别上升19.2%和29.6%;在护栏背风侧形成较大的弱风区域,气流携沙量下降;气流经过缆索护栏时,整体接近初始风速且较为稳定,可有效改善路面积沙现象。In order to solve the driving safety problem caused by the sand accumulation on the section from Naqu to Amdo of G109 national highway,the measured wind speed data of 103563 groups from May 2021 to May 2022 are analyzed,and the average value is selected as the simulation parameter,so as to carry out the numerical simulation of the wind tunnel of the three wave-shape-beam steel guardrail and cable guardrail.The simulation results show that:the airflow will be diverted by the panel when passing through the wave-shape-beam steel guardrail,and the wind speed at the upper and lower edges will be increased by 19.2%and 29.6%respectively.A large weak wind area is formed on the leeward side of the guardrail,and the sand-carrying amount in the airflow decreases.When the airflow passes through the cable guardrail,it is close to the initial wind speed entirely and it is relatively stable,which can effectively improve the sand-accumulated phenomenon of the section.

关 键 词：风洞模拟 公路护栏 风积沙 流体动力学 

分 类 号：U417.12[交通运输工程—道路与铁道工程]