支持式管母线风致振动数值仿真分析

施浩楠; 白英; 冯玉清; 耿小亮; 席婉婉; 李伟男

doi:10.13433/j.cnki.1003-8728.20220072

支持式管母线风致振动数值仿真分析

doi: 10.13433/j.cnki.1003-8728.20220072

1.
宁夏宁电电力设计有限公司, 银川 750001
2.
西北工业大学力学与土木建筑学院, 西安 710129

基金项目:

航空科学基金项目 20170153001

详细信息

作者简介:
施浩楠(1991-), 本科, 研究方向为变电站设计, 3431674@qq.com

通讯作者:
耿小亮, 博士, 高级工程师, gengxiaoliang@nwpu.edu.cn

中图分类号: TB123
计量
- 文章访问数: 224
- HTML全文浏览量: 84
- PDF下载量: 42
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-03
- 刊出日期: 2023-07-25

Numerical Analysis of Wind Induced Vibration of Supporting Type Tubular Busbars

1.
Ningxia Electric Power Company, Yinchuan 750001, China
2.
School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi′an 710129, China

摘要

摘要: 支持式管母线在野外长期服役期间经常遇到风致振动的问题。本文采用数值模拟方法，对支持式管母线抗强风振动特性及阻尼对振动的影响进行了分析。计算了管母线简化模型的固有频率和振型以及受到风荷载作用时的变形特征，采用静态算法和动态算法对比分析了阻尼线对管母线抗风振动所起到的作用。进而对支持式管母线全尺寸结构在风荷载作用下的动态特性进行了计算，分析了阻尼线及管母线结构阻尼对抗风振动的影响。结果表明，理想条件下，阻尼线能有效减小受风载后管母线简化模型的振动变形，但在真实全尺寸管母线结构中，由结构连接等形成的结构阻尼比阻尼线对管母线抗风振动的效果更为显著，有无阻尼线对真实结构振动特性不产生明显区别。
- 管母线 /
- 阻尼线 /
- 固有频率 /
- 风致振动
Abstract: Supporting type tubular busbars often encounter wind-induced vibration problems during long-term service in the field. Numerical simulation methods are used to analyze the wind vibration characteristics of the supported tubular busbar and the influence of damping on vibration. The natural frequency and mode shape of the busbar under ideal conditions and the deformation characteristics when subjected to wind load are calculated. The static algorithm and the dynamic algorithm are respectively used analyze the effect of the damping line on the wind resistance of the busbar. Furthermore, the dynamic characteristics of the full-scale supported tubular busbar structure under wind load are calculated, and the influence of the damping line and the busbar structural damping against wind vibration is analyzed. The results show that in an ideal state, the damping line can effectively reduce the deformation of the busbar after wind load. However, in the real full-size tubular bus structure, the structural damping formed by structural connections is more significant than the effect of the damping wire on the wind vibration of the busbar.
- tubular busbar /
- damping wire /
- natural frequency /
- wind induced vibration

HTML全文

图 1 110 kV支持式管母线安装图

Figure 1. Installation diagram of the 110 kV supported bus duct

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图 2 支持式管母线典型结构尺寸

Figure 2. Typical structural dimensions of supported bus ducts

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图 3 管母线截面尺寸

Figure 3. Cross-sectional dimensions of thebus duct

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图 4 110 kV支撑式管母线三维结构图

Figure 4. 3D structural diagram of the 110 kV supported bus duct

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图 5 阻尼线简化示意图

Figure 5. Simplified diagram of the damping wires

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图 6 无阻尼线管母线的前4阶振型图(变形放大1 000倍)

Figure 6. The preceding four first-order mode figures of undamped bus ducts (deformation amplified 1 000 times)

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图 7 有阻尼线管母线的前4阶振型图(变形放大1 000倍)

Figure 7. The preceding four first-order mode figures of damped bus ducts (deformation amplified 1 000 times)

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图 8 阻尼线施加前后管母线的固有频率

Figure 8. Natural frequencies of the bus duct before and after applying damping wires

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图 9 风荷载施加方向

Figure 9. Direction of wind load application

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图 10 无阻尼线管母线沿风向变形(变形最大时刻, 变形放大100倍)

Figure 10. Deformation of the undamped bus duct along the wind direction (at maximum deformation moment, deformation amplified 100 times)

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图 11 有阻尼线管母线沿风向变形(变形最大时刻, 变形放大100倍)

Figure 11. Deformation of the damped bus duct along the wind direction (at maximum deformation moment, deformation amplified 100 times)

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图 12 有/无阻尼线管母线的最大变形(静态算法)

Figure 12. Maximum deformation of the bus duct with and without damping wires (static analysis)

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图 13 有/无阻尼线管母线的最大变形(动态)

Figure 13. Maximum deformation of the bus duct with and without damping wires (dynamic analysis)

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图 14 无阻尼线110 kV支持式管母线x向变形(5 s时刻)

Figure 14. x-directional deformation of the undamped 110 kV supported bus duct (at 5 s moment)

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图 15 有阻尼线110 kV支持式管母线x向变形(5 s时刻)

Figure 15. x-directional deformation of the damped 110 kV supported bus duct (at 5 s moment)

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图 16 有/无阻尼线110 kV支持式管母线的最大变形

Figure 16. Maximum deformation of the 110 kV supported bus duct with and without damping wires

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表 1 材料参数表

Table 1. Material parameters

材料	部件	弹性模量E/MPa	泊松比	密度ρ/(kg·m^-3)
铝合金	金具	72 000	0.3	2 800
	阻尼线	100	0.3	2 800
	金具托架、耳片	72 000	0.3	2 800
钢Q235	底部支架、横梁、管母线	210 000	0.3	7 800
陶瓷	支柱绝缘子	110 000	0.3	6 000
绝缘子	下法兰盘	173 000	0.3	3 440
法兰盘	上法兰盘	173 000	0.3	2 340

下载: 导出CSV

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