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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年01期

页码:

121-130

栏目:

建筑结构

出版日期:

2025-01-20

文章信息/Info

Title:

Analysis of dynamic characteristics of transmission tower-suspension holding rod coupling system under construction

文章编号:

1673-2049(2025)01-0121-10

作者:

刘骁繁¹,林禹轩²,刘志伟¹,宋子健¹,王 浩²,徐梓栋²

(1. 国网江苏省电力工程咨询有限公司,江苏 南京 210003; 2. 东南大学 混凝土及预应力混凝土结构教育部重点实验室,江苏 南京 210096)

Author(s):

LIU Xiaofan¹, LIN Yuxuan², LIU Zhiwei¹, SONG Zijian¹, WANG Hao², XU Zidong²

(1. State Gird Jiangsu Electric Power Engineering Consulting Co., Ltd., Nanjing 210003, Jiangsu, China; 2. Key Laboratory of C&PC Structures of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China)

关键词:

输电铁塔;  悬浮抱杆;  动力特性;  模态分析

Keywords:

transmission tower;  suspension holding rod;  dynamic characteristic;  modal analysis

分类号:

TU351

DOI:

10.19815/j.jace.2023.03060

文献标志码:

A

摘要:

为了明确在建输电铁塔-悬浮抱杆耦合体系的动力特性,以江苏省某500 kV双回路直线塔组立施工为工程背景,利用ANSYS软件对独立内悬浮外拉线抱杆、独立输电铁塔以及在建输电铁塔-悬浮抱杆耦合体系结构分别进行有限元三维建模; 采用Block Lanczos法对其动力特性进行模态分析计算,并提取3种模型的前20阶振型及自振频率进行对比分析。结果表明:内悬浮外拉线抱杆独立模型的低频振动以正交摆动、1阶扭转以及1阶弯曲为主,符合悬浮抱杆特殊的约束方式和传力体系; 在输电铁塔-悬浮抱杆耦合体系中,由于悬浮抱杆的稳定性较差,耦合体系第1～5阶的模态均为悬浮抱杆的独立振动; 从第6阶模态开始,出现输电铁塔杆件的局部振型以及整体摆动与局部构件振动的耦合振型; 在建输电铁塔-悬浮抱杆耦合体系中抱杆的前5阶振型与独立抱杆模态分析相同,但振动频率有所降低,考虑耦合效应将在一定程度上降低内悬浮外拉线抱杆的模态频率; 研究结果明确了不同施工阶段铁塔-抱杆耦合体系的动力特性,对实际施工中的加固方案设计具有一定的参考意义。

Abstract:

In order to clarify the dynamic characteristics of transmission tower-suspension holding rod coupling system under construction, the construction of a 500 kV double-circuit linear tower in Jiangsu Province was taken as the engineering background, and ANSYS software was used to carry out finite element three-dimensional modeling of the independent internal suspension external tie holding rod, independent transmission tower and the transmission tower-suspension holding rod coupling system structure under construction respectively. Block Lanczos method was used to calculate the dynamic characteristics of the modal analysis, and the first 20 order vibration patterns and frequencies of the three models were extracted for comparison and analysis. The results show that the low-frequency vibration of the independent model of internal suspension external tie holding rod is mainly orthogonal oscillation, first-order torsion and first-order bending, which is consistent with the special restraint mode and force transmission system of suspension rod. In the transmission tower-suspension holding rod coupling system, due to the poor stability of suspension holding rod, the modalities of the 1st-5th order of the coupling system are the independent vibration of suspension holding rod. From the 6th order, the local vibration pattern of the transmission tower pole and the coupled vibration pattern of the overall swing and local member vibration appear. The first five-order vibration pattern of the holding rod in the transmission tower-suspension holding rod coupling system under construction is the same as that of the independent holding rod modal analysis, but the vibration frequency is reduced, so considering the coupling effect will reduce the modal frequency of the inner suspension external tie holding rod to a certain extent. This research results clarifies the dynamic characteristics of the tower-holding rod coupling system in different construction stages, which has some reference significance to the design of the reinforcement scheme in actual construction.

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相似文献/References:

[1]刘树堂.基于多波屈曲单元的输电铁塔结构抗风极限荷载分析[J].建筑科学与工程学报,2015,32(04):105.
　LIU Shu-tang.Analysis of Wind-resistant Limit Load of Transmission Line Steel Tower Based on Multi-wave Buckling Elements[J].Journal of Architecture and Civil Engineering,2015,32(01):105.

备注/Memo

备注/Memo:

收稿日期:2023-11-09
基金项目:国家自然科学基金项目(51978155); 国网江苏省电力工程咨询有限公司科技项目(J2022003)
作者简介:刘骁繁(1987-),男,高级工程师,E-mail:liuxiaofanhd@163.com。
通信作者:王 浩(1980-),男,工学博士,教授,博士生导师,E-mail:wanghao1980@seu.edu.cn。Author resumes: LIU Xiaofan(1987-), male, senior engineer, E-mail: liuxiaofanhd@163.com; WANG Hao(1980-), male, PhD, professor, E-mail: wanghao1980@seu.edu.cn.

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更新日期/Last Update: 2025-01-20