【摘要】 在考虑气固耦联作用基础上研究了高耸细长结构和高耸双曲冷却塔的阵风响应:对前者应用Morison分析法确定风压,导出了适于工程应用的耦联风振系数计算式,通过与Davenport非耦联线性风振理论比较发现耦联作用对其阵风响应的影响不容忽视;对后者应用势流理论导出了塔壳广义振动微分方程中体现气固耦联作用的参量的计算式,并根据量级分析和实例计算表明耦联作用对其阵风响应影响很小,从而为冷却塔塔壳抗风设计和研究提供了可不考虑气固耦联作用的依据。更多还原

【Abstract】 In this paper, based on the consideration of wind-structure interaction, the response of tall slender structure and hyperbolic cooling tower to turbulent wind is studied. By quoting the Morison’s equation to express the wind pressure of tall slender structures, the calculating expression of coupling gust loading factor, which fits applications in engineering, is obtained. As compared with the result from Davenpert’s non-coupled linear theory of wind—induced vibration, it is found that the coupling effect to wind—induced vibration of tall slender structures can’t be neglected. According to potential flow theory, the calculating formulas of the parameters which embody the coupling effects of hyperbolic cooling tower in the generalized motion differential equation are derived. .Results from quantity scale analysis and calculation of examples indicate that the wind-structure interaction effect to the gust response of hyperbolic cooling tower is small and can be neglected and basis for the neglect of gas-solid interaction in wind resistant design and research of cooling tower is provided.更多还原