中文摘要：

在具复杂地形地貌区域架设桥梁，首要解决的问题是风环境参数的问题。本文针对某一具有复杂地形地貌的大范围区域（区域大小23km×27km）复杂地形的风环境进行了数值模拟研究。基于地理信息处理系统（GIS）中的数字地面模型所获得的高程数据，通过逆向工程软件IMAGEWARE及流体动力学建模软件Gambit完成了流体网格的建模工作，对其整体和局部的流场（内层区域的速度场、压力场，越山流动迹线及监控点处的风剖面等）进行了分析，同时对不同的网格划分方式也进行了分析比较。本文的工作也为今后同类大范围区域风场模拟提供了参考。除此之外，用逆向工程软件IMAGEWARE也为今后大尺度区域建模提供了一种新思路。

英文摘要：

The wind field research of complex terrain is of great importance to structural design of bridge as well as safety assessment. Based on Reynolds-averaged N-S equations and Realizable k- ε model, the wind environment for the flow around the large region with complex terrain was numerically simulated and the numerical model was built based on the geography information system database, IMAGEWARE software and Gambit software. The results of numerical simulation based on the various mesh generation were compared. The Wind profile at the measure points, the velocity contour line and pressure distribution in the inner region and streamline over hills based on Various mesh generation were compared.