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以薄平板为研究对象,以大型商用软件为数值仿真平台,对平板静动态气动力的模拟方法及参数敏感性进行了较系统的研究。在优化计算域并合理设置基本参数的基础上,分析了随攻角变化的静态平板气动力系数,模拟了运动状态下平板的气动力时程,计算结果与理论解吻合较好。进一步对比分析了风速、湍流模型、平板宽厚比、运动形态、振动频率及振幅等参数对平板气动力的影响。研究结论对提高桥梁结构CFD分析的准确性有一定借鉴意义。
Taking the thin slab as the research object and the large-scale commercial software as the numerical simulation platform, the static dynamic aerodynamics simulation method and parameter sensitivity are studied systematically. On the basis of optimizing the calculation domain and setting the basic parameters rationally, the static plate aerodynamic coefficient with the change of attack angle is analyzed and the aerodynamic time history of the plate under the motion state is simulated. The calculated result is in good agreement with the theoretical solution. The influences of wind speed, turbulence model, slab ratio, shape of motion, vibration frequency and amplitude on aerodynamics of slab are further analyzed. The conclusion of the study is of some reference to improve the accuracy of CFD analysis of bridge structures.