建筑结构横向脉动风压谱密度函数的分析计算

A Solution for the Spectral Density Function of Across Wind Load Fluctuation

从湍流理论的基本方程出发,导出了建筑结构横向湍流脉动风压谱密度函数的计算公式(非漩涡脱落引起的荷载)。据此公式计算出的结果在一定条件下与刚性模型多点测压风洞试验结果有较好的吻合性。可以由建筑物周围的平均风场分布及脉动风场分布计算这种湍流脉动风压的谱密度函数,为确定结构的横向脉动风荷载提供一定的参考依据。

A basic idea of the evaluation of spectral density function of across-wind load （non-eddy dropping induced across-wind fluctuation load）fluctuation is presented in this paper from the original fluid movement equation in turbulence theory .The wind load fluctuation spectral density function could be derviated from the wind average velocity and fluctuating velocity distribution. This could provide useful reference for defining the whole across-wind load acting on the structure.