中文摘要：

风载荷是影响高压架空输电线路安全运行的重要因素,为分析塔—线耦联体系的动力响应规律,以广东湛江某220kV输电线路为背景,在ANSYS有限元开发环境下,建立三基塔两回线塔—线耦联体系有限元模型。基于Davenport脉动风速功率谱,考虑湛江当地气象条件,模拟生成风速时程,在风速时程作用下,对耦联体系进行风致动力响应分析,并将铁塔动力响应结果与拟静力计算结果进行对比。分析发现,动力分析铁塔顺线路位移是规范拟静力的5.2倍左右,垂直线路位移是静力分析的1.3倍左右;铁塔部分主材单元轴向压应力较拟静力明显增大,这说明现行设计规范存在一定局限性,其结果偏向保守,有待进一步改进或增加设计裕度。

英文摘要：

Wind load is an important factor which affects the safe operation of high voltage overhead transmission lines. In order to analyze the laws of tower-line coupling system, based on typical tower structure of a 220 kV transmission line in Guangdong, a finite element model of a multi-tower-line coupled system, including three towers and two span lines, is established using the development environment of international finite element method program ANSYS. Then, considering the local meteorological conditions in Zhanjiang, davenport power spectrum is used to generate wind speed histories of a given field. Finally, this generated wind field is applied in wind-induced dynamic response analysis of the coupled system, and the dynamic response results of the middle transmission tower in the above coupled system are compared with quasi-static analytical of the solo tower. It is found that tower displacement along the line of dynamic analysis is about 5.2 times, and vertical line displacement is about 1.3 times the quasi-static analysis. Besides, the axial stress in tower of part of the main unit is significantly increased, indicating the existence of certain limitations of the current design code, which need to be further improved.