±800kV直流双柱悬索拉线塔塔线体系风振响应的风洞试验研究  

Wind Tunnel Test on Wind-Induced Response of ±800 kV DC Cross-rope Suspension Tower-line

作　　者：俞登科[1] 李正良[1] 施菁华[2] 晏致涛[1] 肖正直[1] 

机构地区：[1]重庆大学土木工程学院,重庆市沙坪坝区400045 [2]华北电力设计院工程有限公司,北京市西城区100120

出　　处：《中国电机工程学报》2015年第4期1009-1013,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51308568)~~

摘　　要：哈密—郑州±800 k V直流输电线路中大量采用双柱悬索拉线塔,双柱悬索拉线塔由双立柱支撑结构及拉线悬索系统所组成,在概念和设计上均较为简洁,主要受风荷载控制。为研究其风致振动动力响应特点,制作并进行了气动弹性单塔模型和塔线体系模型的风洞试验,测定了在紊流风场中的风振响应,揭示了此类输电塔的荷载传递机制。研究结果表明:在紊流风场中,结构的顺风向和横风向响应处于同一数量级;随风速增加,背风侧拉线趋向松弛,背风侧立柱受压减小;迎风侧拉线张紧,迎风侧立柱受压增大,因而在设计时,需考虑拉线断线和受压立柱动力失稳问题。The cross-rope suspension（CRS） tower has been widely used in the ±800 kV DC project from Hami to Zhengzhou. The CRS tower configuration is simple in both concept and design. It consists of two guyed masts that support the ＂cross-rope＂ conductor suspension system. However, it is sensitive to wind loads. An aero-elastic wind tunnel test was carried out to study wind induced dynamic responses. The wind-induced responses in the turbulent flow were investigated through wind tunnel test. The wind load transferring mechanism of tower-line system was revealed. The results show that the magnitude of along-wind response and that of the across-wind response in the turbulent flow is in the same order. The leeward guys tend to be slack and compression on leeward mast decreases when the wind speed increases. Oppositely, the tension in windward guys and compression on windward mast increases with the wind speed enhancement. The influence of the guy rupture and the dynamic instability of the mast should be considered in the design process.

关 键 词：±800kV 双柱悬索拉线塔 风洞试验 气动弹性模型 风振响应 

分 类 号：TM721.1[电气工程—电力系统及自动化]