粘弹铅芯阻尼器在控制输电塔风振反应中的应用
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摘要
以晋东南~南阳~荆门1000kV输电线路中最常用输电塔为例,为高柔的风敏感结构,有必要对其抗风性能进行分析。以此为工程背景,采用了双层粘弹性材料和铅组合的粘弹铅芯阻尼器进行风振控制。为了不削弱塔杆,将粘弹铅芯阻尼器平行于角钢并联安装于塔杆上,对其具体构造进行了初步地设计。然后根据本工程输电塔的特点,对单塔和塔线耦合体系采用7种方案进行粘弹铅芯阻尼器的布置。编制了风速模拟程序,模拟了适用于本工程的横线向脉动风速场。采用时程分析方法,针对7种阻尼器布置方案计算了单塔和塔线耦合体系在模拟的风荷载作用下的风振响应,进行了时域内的控制效果分析。计算结果表明,所设计的控制系统达到了很好的减振效果,为将来的试验和安装提供了较为准确的理论依据。
The example of Jindongnan-Nanyang-Jingmen 1000kV transmission line system shows that the structure is super flexible and wind-sensitive so that analysis of wind-resistant capacity of the system must be performed. Based on a certain project, the lead viscoelastic dampers with lead double layers of glue elastic material and inside are used to control the wind performance. The structure is preliminarily designed as that lead viscoelastic dampers are installed at the tower pole parallel to the angle steel to avoid weakening of tower pole. According to the project requirement, lead viscoelastic dampers are laid in seven schemes on single tower or tower-line coupling system. A computer program compiled is used to simulate the fluctuating wind velocity. The time history analysis method is used in the seven schemes to calculate the wind-induced response of single tower or tower-line coupling system, and the effects of wind-induced vibration control in time domain are investigated. The result shows the efficiency of the control system and some theoretical bases are provided for advanced experimental research and for correct installing of dampers.
The example of Jindongnan-Nanyang-Jingmen 1000kV transmission line system shows that the structure is super flexible and wind-sensitive so that analysis of wind-resistant capacity of the system must be performed. Based on a certain project, the lead viscoelastic dampers with lead double layers of glue elastic material and inside are used to control the wind performance. The structure is preliminarily designed as that lead viscoelastic dampers are installed at the tower pole parallel to the angle steel to avoid weakening of tower pole. According to the project requirement, lead viscoelastic dampers are laid in seven schemes on single tower or tower-line coupling system. A computer program compiled is used to simulate the fluctuating wind velocity. The time history analysis method is used in the seven schemes to calculate the wind-induced response of single tower or tower-line coupling system, and the effects of wind-induced vibration control in time domain are investigated. The result shows the efficiency of the control system and some theoretical bases are provided for advanced experimental research and for correct installing of dampers.
引文
[1]瞿伟廉.高层建筑和高耸结构的风振控制设计[M].武汉:武汉测绘科技大学出版社,1991.
[2]黄本才.结构抗风分析原理及应用[M].上海:同济大学出版社,2001.
[3]中华人民共和国电力行业标准,《架空送电线路杆塔结构设计技术规定》(DL/T5154-2002).
[4]中华人民共和国国家标准,《建筑结构荷载规范》(GB50009-2001).
[5]钟寅亥,李黎,江宜诚.粘弹性阻尼器在控制输电塔风振反应中的应用[J].华中科技大学学报(城市科学版),2003,20(2):69—71.
[6]江宜诚,钟寅亥,樊剑,李黎.粘弹性阻尼器控制下大跨越输电塔风振响应分析[J].特种钢结构,2003,4(18):34—36.
[7]黄斌,唐家祥.大跨越自立式高压输电塔风振控制[J].特种结构,1997,14(3):49—52.
[8]周云,邓雪松,徐赵东.铅粘弹性阻尼器性能试验研究[J].地震工程与工程振动,2001,21(1):139—142.
[9]周云,徐赵东,邓雪松.铅粘弹性阻尼器的力学模型[J].地震工程与工程振动,2000,20(1):120—123.
[2]黄本才.结构抗风分析原理及应用[M].上海:同济大学出版社,2001.
[3]中华人民共和国电力行业标准,《架空送电线路杆塔结构设计技术规定》(DL/T5154-2002).
[4]中华人民共和国国家标准,《建筑结构荷载规范》(GB50009-2001).
[5]钟寅亥,李黎,江宜诚.粘弹性阻尼器在控制输电塔风振反应中的应用[J].华中科技大学学报(城市科学版),2003,20(2):69—71.
[6]江宜诚,钟寅亥,樊剑,李黎.粘弹性阻尼器控制下大跨越输电塔风振响应分析[J].特种钢结构,2003,4(18):34—36.
[7]黄斌,唐家祥.大跨越自立式高压输电塔风振控制[J].特种结构,1997,14(3):49—52.
[8]周云,邓雪松,徐赵东.铅粘弹性阻尼器性能试验研究[J].地震工程与工程振动,2001,21(1):139—142.
[9]周云,徐赵东,邓雪松.铅粘弹性阻尼器的力学模型[J].地震工程与工程振动,2000,20(1):120—123.
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