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以300 m级利通广场为研究对象,基于ANSYS平台,建立建筑的壳单元气弹模型,输入合理流场信息,对结构风振响应和流场特性进行分析。研究表明,气流在结构前缘发生分离,屋顶斜坡处气流发生再附,结构后方形成湍流度较强的尾流区,结构迎风面上正风压随高度而增大,结构背风面和侧面因处于尾流区而呈现负压;结构不同高度处出现涡源,随平均风输送而远离结构表面;结构顶部的顺风向和横风向响应与风洞试验结果接近。
With 300 m Litong Square as the research object, based on the ANSYS platform, a shell-type aeroelastic model of the building is established, and reasonable flow field information is input to analyze the wind-induced vibration response and the flow field characteristics. The results show that the airflow is separated at the leading edge of the structure, and the air flow at the slope of the roof re-attaches to the rear of the structure to form turbulence wake area. The positive wind pressure on the windward side of the structure increases with height, And the negative pressure appears in the wakes. The vortex sources appear at different height of the structure, and are transported away from the surface of the structure with the average wind transmission. The response of the windward and transverse winds at the top of the structure is close to that of the wind tunnel test.