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为研究超过规范190m高度限值特大型冷却塔风振系数,以笔者提出的风振“一致耦合分析”方法为核心,基于MATLAB高级设计语言开发出大型冷却塔风振动力计算软件。并以国内某拟建220m高特大型双曲混凝土冷却塔为例,进行测压风洞试验获取结构外表面气动力分布模式与脉动风时程,建立整塔足尺有限元仿真模型分析结构自振特性。在此基础上,进行冷却塔整体结构的风振动力特性计算,提炼出径向位移、子午向轴力、环向弯矩、Mises应力及第一主应力等多种等效目标下风振系数三维分布规律,最终给出多目标下风振系数精细化和差异化取值建议。研究成果和结论可为此类特大型双曲线冷却塔抗风设计提供参考依据。
In order to study the wind-induced vibration coefficient of extra-large cooling tower with 190m altitude limit, the wind-vibration dynamic calculation software of large-scale cooling tower was developed based on MATLAB advanced design language based on the wind-induced “uniform coupling analysis ” method. Taking a 220m-height extra-large hyperbolic concrete cooling tower in China as an example, a pressure wind tunnel test is conducted to obtain the aerodynamic distribution pattern and the fluctuating wind time history of the structure, and a full-scale full-scale finite element simulation model is established to analyze the structure of the structure Vibration characteristics. On this basis, the calculation of the wind-induced vibration characteristics of the overall structure of the cooling tower is carried out, and the wind-induced vibration coefficients of a variety of equivalent targets such as radial displacement, meridional axial force, toroidal bending moment, Mises stress and the first principal stress are extracted. Finally, the suggestions of how to refine and differentiate the wind-induced vibration coefficients under multi-objective are given. The research results and conclusions can provide references for the wind-resistant design of such extra-large hyperbolic cooling towers.