柱面壳体表面风压分布特性风洞试验研究

基于刚性模型的风洞试验，在不同风攻角及场地条件下，对考虑不同长跨比的柱面壳体表面风压分布进行了同步测量-根据测量结果对壳体表面风压场特性进行了分析，包括风压系数、整体风力系数、脉动风压自功率谱及互功率谱、风压场本征正交分解特性、雷诺数对壳体表面风压分布的影响等．结果表明，此类曲面模型表面风压分布受雷诺数影响明显，且模型曲面特性使得风场本征正交分解的前几阶特征模态对整个风压分布的贡献增大．

Wind Tunnel Tests for Wind Pressure Distribution Characteristics on Cylindrical Shells

Based on wind tunnel tests,wind pressure distributions on cylindrical shells with different aspect ratios were measured simultaneously in wind tunnel with rigid models under different terrain types and attack angles.Some characteristics of the measured wind pressure field were discussed,including distributions of wind pressure,the effects of shape ratio on total wind force coefficients,auto-and cross-power spectral density(PSD) distributions of fluctuating wind pressure,characteristics of the proper orthogonal decomposition(POD) results of the measured wind pressure field,effects of Reynolds number on wind pressure distributions,etc.The results show that the effect of Reynolds number on the wind pressure distributions of these curved models is evident,and the contributions of the first several POD eigenvectors to the overall wind pressure distributions become much bigger.