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本文分析并指出了《架空送电线路杆塔结构设计技术规定》(DL/T5154-2002)中关于计算输电塔风振系数条文中存在的问题,引进了基于输电塔气弹模型风洞试验数据得到的输电塔顺风向1阶广义风荷载谱模型,并对其进行了地貌和振型修正。详细推导了基于修正的输电塔1阶广义风荷载谱计算其风振系数的方法,采用该方法计算了某大跨越输电塔的风振系数,并且与基于准定常理论采用Daven-port谱和规范方法计算得到的风振系数进行比较,所得结论具有重要的参考价值,可以直接为输电线路工程设计提供借鉴。
This paper analyzes and points out the problems existing in the provisions of the Technical Regulation on the Design of Tower Structure of Overhead Transmission Lines (DL / T5154-2002) for the calculation of the wind-induced vibration coefficient of transmission towers, and introduces the wind tunnel test data based on the aeroelastic model of transmission towers The first-order generalized wind load spectrum model of the downwind wind power transmission tower was constructed and its topography and mode shapes were corrected. The method of calculating the wind-induced vibration coefficient of the first-order generalized wind load spectrum of a transmission tower is deduced in detail. The wind-induced vibration coefficient of a long-span transmission tower is calculated and compared with the wind-induced vibration coefficient of Daven-port spectrum based on the quasi-stationary theory The calculated wind-induced vibration coefficients are compared and the conclusions obtained are of important reference value, which can directly provide references for transmission line engineering design.