摘要
基于二维不可压缩流假设 ,采用k ε湍流模型 ,对横向风中不同来流攻角作用下的YZ2 2 型车辆单体和双层客车车辆单体 ,以及前者在 16m ,后者在 2 4m预应力混凝土“T”形简支梁桥上的多种工况模型绕流进行了数值模拟 ,分别得到YZ2 2 型车辆和双层客车车辆在 16m和 2 4m预应力混凝土“T”形简支梁桥上气动三分力系数 .研究结果表明 :在横向风作用下 ,YZ2 2 型车辆和双层客车车辆的气动三分力系数与各自单独存在时的相比明显增大 ;计算YZ2 2型车辆和双层客车车辆在 16m和 2 4m预应力混凝土“T”形简支梁桥上所受的横向风荷载时 ,应重视铁路桥梁对其运行的影响 ;YZ2 2
Based on the incompressible flow field in two dimensions with k ε turbulence model, the aerodynamic characteristics of YZ 22 vehicle and double deck vehicle, the former on the 16 m railway free beam bridge, and the later on 24 m railway free beam bridge in cross wind, are simulated. It is found that the aerodynamic coefficients of both YZ 22 and the double deck vehicles are too much larger than those of the two vehicle staying without railroad bridges. It is also shown that the aerodynamic characteristics of the YZ 22 vehicle is better than that of the double deck vehicle when both passing on the 16 m and 24 m railroad freebeam bridges respectively.
出处
《中南工业大学学报》
CSCD
北大核心
2001年第4期410-413,共4页
Journal of Central South University of Technology(Natural Science)
基金
国家自然科学基金资助项目 ( 5 97780 43)
