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Analysis Of Mechanical Properties Of UHV Cup Tower Under Different Assembly States
- Moren Journal (2025)
- 作者机构：
1.三峡大学 电气与新能源学院,湖北省宜昌市443002
2.三峡大学 湖北省输电线路工程技术研究中心,湖北省宜昌市443002
3.安徽送变电工程有限公司,安徽省合肥市230036
- 作者简介：
- 基金信息：Key Research and Development Projects of Hubei Province(2020BAB110)
DOI：
CLC：Received：24 July 2024，
Revised：28 August 2024，
Accepted：22 September 2024，
- 稿件说明：
移动端阅览
WANG Shuang, LIU Ling, TANG Bo, et al. Analysis Of Mechanical Properties Of UHV Cup Tower Under Different Assembly States[J/OL]. Moren journal, 2025.
摘要
特高压大跨越酒杯塔因其较大的塔头尺寸、特殊的曲臂结构，使得该类铁塔的组立工程相比一般铁塔的组立施工，难度更大、要求更高。为保障此类铁塔组立工程的安全高效开展，本文以某1000kV单回路大跨越酒杯型钢管塔为研究对象，建立模块化铁塔有限元模型，对组立至不同状态时的铁塔结构进行模态分析，获取其固有力学特性；考虑高度对风速的影响，对铁塔风荷载进行精确计算，研究风荷载及重力荷载共同作用下不同组立状态时铁塔结构的力学特性。结果表明：整塔的前6阶振型主要表现为塔头及塔身弯曲和扭转的特点，且随着铁塔组立高度的增加，结构自振频率值逐渐降低，其最大位移和应力总体呈增大的趋势。铁塔组立至塔头K节点部位时，结构最大位移、应力出现激增，应力最大值为189.6MPa，出现在塔头K节点处（上、下曲臂构件连接位置），施工过程中应对该工况予以高度重视。组装完成的铁塔能抵御12级风荷载（34.8m/s）的作用，其薄弱杆件部位为塔身第一、二节主材连接处和塔头上、下曲臂构件连接处，需在铁塔组立及后期运行维护工作中对其重点监测，确保整塔的安全稳定。
Abstract
Because of its large tower head size and special crank arm structure
the assembly construction of UHV large span cup tower is more difficult and more demanding than that of general tower. In order to ensure the safe and efficient development of such tower assembly projects
this paper takes a 1000 kV single-circuit large-span cup-shaped steel pipe tower as the research object
establishes a modular tower finite element model
and performs modal analysis on the tower structure when it is assembled to different states to obtain its inherent mechanical properties. Considering the influence of height on wind speed
the wind load of the tower is accurately calculated
and the mechanical properties of the tower structure under different assembly states under the combined action of wind load and gravity load are studied. The results show that the first six vibration modes of the whole tower are mainly characterized by bending and torsion of the tower head and tower body. With the increase of the height of the tower
the natural frequency of the structure decreases gradually
and the maximum displacement and stress show an increasing trend. When the tower is set up to the K-joint of the tower head
the maximum displacement and stress of the structure increase sharply
and the maximum stress is 189.6 MPa
which appears at the K-joint of the tower head ( the connection position of the upper and lower crank members ). This working condition should be highly valued in the construction process. The assembled tower can resist the action of 12-level wind load (34.8m/s). The weak parts of the tower are the joints of the first and second main members of the tower body and the joints of the upper and lower crank arm members of the tower head. It is necessary to focus on monitoring in the tower assembly and later operation and maintenance work to ensure the safety and stability of the whole tower.
关键词
Keywords
references
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