桥梁闭口箱梁三分力数值识别中的湍流模型比选

邓文 葛耀君 曹丰产

（同济大学土木工程防灾国家重点实验室， 上海200092）

摘要:  本文对以苏通桥断面为例的桥梁闭口箱梁模型进行了三分力系数CFD数值识别。分别采用不同湍流模型及近壁条件进行数值模拟，并将数值模拟结果与风洞试验值进行比较。同时使用层流模型采用加密网格进行数值模拟，对不同湍流模型模拟结果进行压力等值线的比较，通过识别得到的三分力系数和压力等值线，确定出闭口箱梁绕流数值计算最合理的湍流模型。

关键词:  桥梁闭口箱梁、湍流模型、三分力系数，压力等值线

Influence of Turbulence Models in Numerical Identification of Aerostatic Force for Box Section Girder Bridge

DENG Wen  GE Yao-jun  CAO Feng-chan

State Key Laboratory for Disaster Reduction in Civil Engineering of Tongji University, Shanghai 200092

Abstract: Numerical identification of aerostatic force is conducted for Sutong Bridge section in CFD modeling. Influence of turbulence models is compared here and numerical results are compared to the result of wind tunnel tests. Pressure contours obtained using different turbulence models are also compared to the pressure contour using laminar model with dense mesh elements. A most rational turbulence model is obtained for numerical simulation of the flow around box bridge section.

Key words: box section girder bridge, turbulence model, aerostatic force, pressure contour