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中国电机工程学报 2008, 28(16) 108-114 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 输配电及供电 |
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多点激励下输电塔-线体系的侧向地震反应分析 |
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田利 李宏男 黄连壮 |
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海岸与近海工程国家重点实验室(大连理工大学) 海岸与近海工程国家重点实验室(大连理工大学) 辽宁电力勘测设计院 |
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摘要：
建立了输电塔-线体系三维有限元模型，并考虑了导(地)线的几何非线性特征；提出了依据现行设计规范模拟输电塔-线体系多点地震动时程；利用非线性时程分析方法研究了该体系在多点激励下的侧向反应特性，并与一致激励、仅考虑行波效应激励、仅考虑相干效应激励下的反应情况进行比较。结果表明，一致激励情况下输电塔-线体系不能得到最不利响应；多点激励增加了输电塔的地震响应，同时多点激励明显放大了导(地)线的侧向位移响应，这些均与行波波速和相干模型关系很大。由此得出结论：为得到输电塔-线体系的最不利响应，须准确估计行波波速，输电塔-线体系考虑多点激励的影响十分必要。 |
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关键词：
输电塔-线体系
几何非线性
多点激励
相干效应
一致激励
行波波速
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Lateral Response of Transmission Tower-line System Under Multiple Support Excitations |
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TIAN Li LI Hong-nan HUANG Lian-zhuang |
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Abstract:
A three-dimensional finite element model of transmission tower-line system considering the geometric nonlinearity of transmission line was established, and the multiple support seismic time history of the transmission tower-line system was generated based on the Code for Design of Seismic of Electrical Installations, and the lateral response of the system was analyzed based upon nonlinearity time history integration method on multiple support excitations, and the comparison among multiple support excitation, uniform excitation, the excitation considering traveling-wave effect only and the excitation considering coherency effect only was carried out. The result indicates that uniform ground motion does not provide the most critical case for the response calculations, and the multiple support excitation increases the response of the transmission tower and has a significant effect on the lateral displacement of transmission lines, and those all depend on the traveling-wave velocity and coherency model. The conclusions are that a representative analysis of transmission tower-line system can be obtained from an accurate estimation of traveling-wave velocity, and considering the multiple support excitation effect is very necessary to the transmission tower-line system. |
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Keywords:
transmission tower-line system
geometric nonlinearity
multiple support excitation
coherency effect
uniform excitation
traveling-wave velocity
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收稿日期 2007-12-12 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 田利 |
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作者简介: |
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作者Email: tianl-007@163.com;hnli@dlut.edu.cn |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．柳国环 李宏男.高压输电塔-线体系风致动力响应分析与优化控制[J]. 中国电机工程学报, 2008,28(19): 131-137 |
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| Copyright by 中国电机工程学报 |
