基于ALE格式的动网格方法数值模拟断面气动导数

详细信息

MOVING GRIDS METHOD SIMULATION OF SECTIONS’ AERODYNAMIC DERIVATIVES BASED ON ALE FORMAT

摘要: 采用有限体积法，湍流效应采用大涡模拟，及使用基于任意拉格朗日-欧拉格式的动网格方法计算任意时刻运动断面所受气动荷载。通过对已有网格生成方法 —— 标准弹簧系数法进行改进，增加角度及边界等改进因子，大大提高了边界移动后的网格生成质量。利用强迫振动法对箱梁及边主梁断面的气动导数进行了数值模拟，计算结果与试验结果取得了较好的一致，表明采用CFD方法进行断面气动导数的数值模拟的可行性。
- 有限体积法 /
- 大涡模拟 /
- 任意拉格朗日欧拉格式 /
- 动网格 /
- 弹簧近似法 /
- 气动导数
Abstract: In this paper, the turbulence is simulated by the standard large eddy model using the finite volume method, where the moving boundary’s air loading is calculated using the Moving Grids Method of Arbitrary Lagrange-Euler format. By changing the angel and boundary’s revision factors, the quality of grids is improved. Through the forced vibration method, the aerodynamic derivatives of two typical girder sections (box girder and side main girder) are simulated, whose results are consistent with those of wind tunnel test. So the proposed CFD method can be used to simulate the bridge deck’s aerodynamic derivatives.
- finite volume method /
- large eddy simulation /
- arbitrary Lagrange-Euler(ALE) /
- moving grids method /
- spring analogy /
- aerodynamic derivatives