220kV双回路典型角钢输电塔动力特性及抗风性能评估

张佳毅; 占鹭林; 曹枚根; 张若愚; 陈长龙

doi:10.13206/j.gjgS22072002

220kV双回路典型角钢输电塔动力特性及抗风性能评估

doi: 10.13206/j.gjgS22072002

1. 北方工业大学土木工程学院, 北京 100144;
2. 温州电力建设有限公司, 浙江温州 325024;
3. 上海大学力学与科学工程学院, 上海 200444

基金项目:

国家电网有限公司总部指南科技项目(5200-201919121A-0-0-00)

浙江省电力实业总公司科技项目资助(CF058807002021006)

详细信息

作者简介:
张佳毅,男,1997年出生,硕士研究生。Email:903221651@qq.com

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出版历程
- 收稿日期: 2022-07-20
- 刊出日期: 2023-01-25

Evaluation of Dynamic Characteristics and Wind Resistance of 220 kV Dual-Loop Typical Angle Steel Transmission Tower

1. School of Civil Engineering, North China University of Technology, Beijing 100144, China;
2. Wenzhou Electric Power Construction Co., Ltd., Wenzhou 325024, China;
3. School of Mechanics and Science Engineering, Shanghai University, Shanghai 200444, China

摘要

摘要: 输电塔是一类风敏感结构,具有自重大、结构柔、小阻尼等特点,对风荷载激励较为敏感,在东南沿海台风多发地区,风荷载是导致输电塔倒塔和事故的重要原因。为保障我国东南沿海地区输电线路的安全运行,合理评估该地区输电塔的抗风性能尤为重要。以福建福鼎沿海地区新建的220 kV双回路线路的典型直线塔为研究对象,开展了输电塔的动力特性、风振响应及抗风性能评估研究。首先,对输电塔进行了现场动力特性测试,测试输电塔在自然激励下的响应,采用随机子空间法识别输电塔频率和阻尼比等动力特性参数;其次,采用ANSYS软件建立了该输电塔的有限元计算模型,通过对输电塔动力特性的理论分析和现场实测,进一步认识和掌握了该塔的振动特性同时验证有限元模型的正确性;最后,依据现有规范对输电塔进行0°、45°、60°、90°静力风荷载分析及风速重现期分别为30,50,100 a的风振响应分析,得到静力、脉动风荷载作用下输电塔的塔顶位移值及塔身主材最大压应力值。在此基础上,采用输电塔的塔顶偏移比、杆件压屈比等评估参数对输电塔抗风性能进行评估。结果表明:该方法有效评估了输电塔在风速重现期分别为30,50,100 a的抗风能力,得到该基输电塔的抗风性能设计较为安全的结论。
- 双回路输电塔 /
- 动力特性 /
- 风振响应 /
- 抗风性能评估
Abstract: The transmission tower is a kind of wind-sensitive structure with the characteristics of high self-weight, structural flexibility and small damping, and is sensitive to wind load excitation. The wind load in the typhoon-prone areas in the southeast coast is an important cause of tower collapse and accidents. In order to improve the safety and reliability of transmission lines in the southeast coastal areas of China, it is particularly important to reasonably evaluate the wind resistance performance of transmission towers in this area. In this paper, the dynamic characteristics analysis, wind-induced vibration response analysis and wind-resistant performance evaluation of a typical transmission tower are carried out based on a new 220 kV double-circuit transmission line in the coastal area of Fuding, Fujian Province. Firstly, the dynamic characteristics of the transmission tower were tested on site to test the response of the transmission tower under natural excitation, and the dynamic characteristics parameters such as the frequency and damping ratio of the transmission tower are identified by the random subspace method; Secondly, the finite element calculation model of the transmission tower is established by using ANSYS software. Through theoretical analysis and field measurement of the dynamic characteristics of the transmission tower, the vibration characteristics of the tower are further understood and mastered, and the correctness of the finite element model is verified; Further, according to the existing specifications, the static wind load analysis of 0°, 45°, 60° and 90° and the wind vibration response analysis with wind speed return period of 30 years, 50 years and 100 years are carried out for the transmission tower, and the maximum compressive stress value of the main material of the transmission tower under the static and fluctuating wind load is obtained. On this basis, the wind resistance performance of the transmission tower is evaluated by the tower top offset ratio, the pole bending ratio and other evaluation parameters. The results show that this method can effectively evaluate the wind resistance of the transmission tower with the wind speed return period of 30 years, 50 years and 100 years, and the conclusion that the wind resistance design of the transmission tower is relatively safe is obtained. The research and related conclusions have important reference value for the wind resistance design and wind resistance performance evaluation of transmission towers in the future.
- dual-circuit transmission towers /
- dynamic characteristics /
- wind vibration response /
- wind resistance performance evaluation

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参考文献(16)

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