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基于计算流体动力学方法,利用FLUENT软件对架空碟形空间结构的风场绕流特性和表面风压分布进行数值模拟,获得不同风向角下结构风压分布,分析了支撑柱高度、上碟面和下碟面矢跨比对风载体型系数分布和结构风致整体合力的影响.结果表明,支撑柱高度的选择既要有利于空气泄流,又要防止因高度过高引起风致整体合力的增大.研究发现,随着上下碟面矢跨比增加,迎风面正风压显著增大,背风面涡旋作用更加明显,结构风致整体合力呈增大趋势,碟面扁平化可明显改善结构抗风特性.给出的架空碟形空间结构抗风优化建议,可为该类结构抗风设计提供参考.
Based on computational fluid dynamics (CFD) method, FLUENT software was used to simulate wind flow field and surface wind pressure distribution of overhead dish structure. Wind pressure distribution was obtained under different wind direction angles. The relationship between height of supporting column, And the effect of subspace sag ratio on the distribution of wind load factor and the overall resultant force of structural winds.The results show that the choice of supporting column height is not only conducive to the air leakage but also to the increase of wind induced overall force due to the high altitude Large.The study found that, as the ratio of vertical and horizontal disc sag increases, the windward wind pressure is significantly increased, the leeward vortex effect is more obvious, the overall structure of the wind force tends to increase, flattening disc can significantly improve the structural resistance Wind characteristics.The proposed wind-resistant optimization of the overhead dish-shaped space structure can provide a reference for the wind-resistant design of the structure.