论文部分内容阅读
在边界层风洞中完成了一系列矩形截面高层建筑刚性模型的同步测压试验,研究了根方差扭矩系数和基底扭矩功率谱的基本特性。结果表明,层根方差扭矩系数沿高度呈抛物线分布,基底根方差扭矩系数随厚宽比的增大而增大。厚宽比小于1时,基底扭矩功率谱有一个明显的窄带谱峰;厚宽比大于1时,出现两个谱峰,随着厚宽比的增大,两个谱峰逐渐靠近。以厚宽比为自变量,拟合得到了根方差扭矩系数和基底扭矩功率谱的计算公式。
In the boundary layer wind tunnel, a series of simultaneous pressure measurement experiments were carried out on a series of rigid models of rectangular tall buildings, and the fundamental characteristics of root variance torque coefficient and base torque power spectrum were studied. The results show that the variance coefficient of square root of stratification shows a parabola distribution along the height, and the variance coefficient of root mean square torque increases with the increase of aspect ratio. When the thickness to width ratio is less than 1, the power spectrum of the substrate has a distinct narrowband spectrum. When the aspect ratio is larger than 1, two spectral peaks appear, and as the aspect ratio increases, the two spectral peaks gradually approach. Using the aspect ratio as the independent variable, the formulas of root variance torque coefficient and base torque power spectrum were obtained.