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采用计算流体动力学方法结合地形数字模型建立了桥位地形风特性数值模拟方法,针对单峰山丘分别采用RNGk-ε和SSTk-ω两种湍流模型进行数值模拟,然后以某拟建大桥为背景采用RNGk-ε湍流模型进行桥位地形风场数值模拟。研究表明,采用RNGk-ε和SSTk-ω模型进行单峰山丘风场计算结果较为接近;实际地形桥位风场特性计算结果与现场实测值相近,计算精度满足工程需要。
The computational fluid dynamics method and terrain numerical model are used to establish the numerical simulation method for the topographic wind characteristics at the bridge position. The single-peaked hills are numerically simulated by RNGk-ε and SSTk-ω turbulence models, respectively. The RNGk-ε turbulence model is used to simulate the wind field at the bridge position. The results show that the wind field calculated by RNGk-ε and SSTk-ω models is close to the wind field calculated by single peak, and the calculation results of actual wind field at bridge site are similar to the measured ones. The calculation accuracy meets the needs of engineering.