【摘要】 本文从空气弹性力学理论出发,详细研究了高耸结构横向风振的主要形式——涡激振动,得出了风激锁定激励时高耸结构的共振区域的确定方法和响应计算式,在此基础上讨论了横风向最大共振荷载的发生风速以及适于工程应用的横向风振响应算式和图表。文中给出的工程实例表明,基于本文理论的横风向风振验算方法的计算结果与实测值吻合得很好。根据本文研究表明,对目前工程中应用的横风向风振验算法在确定共振区域和验算风荷载方面应作重新评价。更多还原

【Abstract】 In this paper, based on the theory of aeroelastic mechanics, the vortex-in-duced vibration, which is the main form of wind-induced crosswind vibrations, is studied in details, and the determination of resonance region and calculation formulas of the response of tower structures due to wind-induced lock-in excitation are obtained. Based on these researches, the wind velocity corresponding to the occurance of peak crosswind resonance and calculation method of crosswind response which fits applications in engineering are discussed. The examples given in this paper show that results from the computing method of crosswind vibration based on the above-mentioned theory agree well with the full-scale measurement. According to the present research, the current calculation method of wind-induced crosswind vibration, which is applied in engineering, must be appraised again in the determination of resonance region and crosswind wind load in design.更多还原