【摘要】 桅杆结构因微风作用而导致的疲劳破坏时有发生,了解结构所受的实际动力风荷载是研究结构风致疲劳的一个前提。文中以桅杆结构为例,阐述了高耸结构动力风荷载反演的思路,建立了桅杆结构二维动力风荷载等效线性识别的模型。采用基于模态分析法的动态荷载识别方法和基于精细时程积分法的精细模态识别法,利用结构在模拟风荷载下有限点的动力响应反演了作用在结构上的动态荷载。算例仿真的结果表明,文中的方法可以满足桅杆结构荷载识别的要求。更多还原

【Abstract】 The failure of guyed mast caused by breeze occurred frequently.Acquisition of the actual dynamic wind load was the prerequisite of the research on wind-induced fatigue breakdown.This paper introduced methods of two-dimensional dynamic wind load identification for high-rise structures.The equivalent linear load identification model of guyed mast was proposed first.Then,the methods based on modal analysis and precise time integration were adopted to identify the load,using structural dynamic responses of limited points under simulated wind load.Results of the numerical example indicated that methods in this paper could be effective in dynamic load identification of high-rise structures.更多还原