1000kV汉江大跨越特高压输电塔线体系气动弹性模型的设计与风洞试验

Aeroelastic Model Design and Wind Tunnel Tests of 1 000 kV Hanjiang Long Span Transmission Line System

以建设中的1000kV汉江大跨越输电线路工程为背景,针对大跨越输电线路塔线体系风致响应较大的特点,进行了气弹模型风洞试验,分析了单塔及塔线体系在均匀流及紊流下的风振响应。塔线体系为四塔三线模型,并采用刚性节段加V型弹簧片法设计输电塔气动弹性模型。通过对实验结果进行分析,获得了塔线体系动力特性和风振响应等数据,研究了导线对输电塔的影响。结果表明,风荷载作用下导线与输电塔的耦合振动不可忽略。

Taking the 1000kV Hanjiang long span transmission project being constructed as research background, according to the feather that the wind-induced response of long span transmission line system is evident, the wind tunnel tests for aeroelastic model are performed, and the wind-induced responses of single tower and tower-transmission line system tinder uniform flow and turbulent flow are analyzed. The model of tower-transmission line system consists of four towers and three spans of transmission lines, and the aeroelastic model of the tower is designed by use of rigid subsections with ＂V＂ shaped spring added. Through the analysis on experimental results, the data of dynamic characteristic and wind-induced response of the tower-transmission line system is obtained, and the impact of conductors on tower is researched. Research results show that under the wind load the coupled vibration of conductors and transmission tower should not be neglected.