【摘要】 本文叙述了对于半球薄壳体的风荷载进行风洞实验的结果。文中给出了在风向角β等于零、开启角α变化时的力系数、力矩系数和壳体内外表面上压力分布的曲线并进行了讨论。文中也给出了β不等于零时,力、力矩和压力的计算公式和一些流场显示照片。更多还原

【Abstract】 Structures of buildings, especially part of them, may take the form of hemispherical shells. For some special purposes, these shell are required to be movable, that is, relative to the incoming wind, they may have different angles of attack α at different angles of wind directions β. The present paper gives the experimental results of wind tunnel study of the wind loadings on a hemi-spherical shell for 0≤α≤90°, β = 0 under the test Reynolds number around 1.57×106. The loadings include forces, moments and pressure distributions on both sides of the shell. Formulas to compute loadings at other wind directions from zero angle values are presented. For the case of α = 90°, β = 180°, the effect of Reynolds number on pressure distributions is also investigated.更多还原