半封闭式车站列车风压极值分布规律研究  

A study on the extreme wind pressure distribution induced by trains in semi-closed stations

作　　者：郑华冬 郑浩东 王贞 谢伟平[1,2] 吴斌[1,2] ZHENG Huadong;ZHENG Haodong;WANG Zhen;XIE Weiping;WU Bin(Hainan Institute,Wuhan University of Technology,Sanya 572025,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学海南研究院,海南三亚572025 [2]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《振动与冲击》2024年第12期1-8,共8页Journal of Vibration and Shock

基　　金：武汉理工大学三亚科教创新园开放基金(2022KF0004);海南省自然科学基金(523QV265);国家自然科学基金青年项目(52308199)。

摘　　要：为了研究半封闭式车站内风压极值的分布规律,对高速列车通过高铁站时引起的列车风压进行数值模拟,并通过现场实测数据验证数值模型的准确性。基于验证的数值模型,研究列车分别以250 km/h、300 km/h和350 km/h的速度通过高铁站时,两个典型区域(临近站台区Ⅰ、远离站台区Ⅱ)的风压(头波、尾波的正压和负压)极值分布规律,并提出相应的风压极值经验公式。研究结果表明:风压极值与列车速度之间呈非线性关系;相同的车速下,区域Ⅰ和区域Ⅱ内列车风压极值随着水平距离的增加呈指数函数形式衰减,而衰减的速度与高度成反比;当水平距离小于15 m时,相同高度下区域Ⅰ的头波正压极值总是比区域Ⅱ的大,而区域Ⅰ的头波负压极值的绝对值又总比区域Ⅱ的小;当水平距离超过15 m时,车站内的风压极值逐渐趋于稳定,并且区域Ⅰ内趋于稳定的风压极值要强于区域Ⅱ;所提经验公式能够较为准确地描述半封闭式高铁站内列车风压极值分布规律。研究成果可为半封闭式车站的结构设计提供参考。To study the extreme wind pressure distribution in semi-closed stations,the wind pressures induced by high-speed trains passing through the railway stations were simulated.The accuracy of the numerical model was also verified against the field-measured data.Based on this validated numerical model,the extreme wind pressure distribution at the train head and tail was analyzed for the two typical station regions(Near platform Region Ⅰ and far from platform Region Ⅱ) under the traveling train speed of 250 km/h,300 km/h,and 350 km/h,respectively.The corresponding empirical equations were established.The results show that there is a nonlinear relationship between extreme wind pressures and train speeds.At the same train speed,the extreme wind pressures in Region Ⅰ and Region Ⅱ decrease exponentially with the horizontal distance,whereas the decrease rate is inversely proportional to the vertical distance.When the horizontal distance is less than 15 m,the positive extreme wind pressures due to train head in Region Ⅰ are always larger than those in Region Ⅱ at the same vertical distance,while the absolute values of the negative extreme wind pressures due to train head in Region Ⅰare always smaller than those in Region Ⅱ.When the horizontal distance exceeds 15 m,the extreme wind pressures gradually tend to be steady,and the corresponding steady values in Region Ⅰ are larger than those in Region Ⅱ.The empirical equations developed in this paper can accurately describe the extreme wind pressure distribution in the semi-closed station.The research results can provide reference for the structural design of semi-closed stations.

关 键 词：半封闭式高铁站 现场实测 列车风 压力极值 滑移网格 

分 类 号：U291.6[交通运输工程—交通运输规划与管理]