基于阻尼耗能原理的高压输电塔风振抑制方法
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摘要
由于输电线路的风致振动可降低输电杆/塔、导线和金具连接件的疲劳强度,严重时可导致倒杆/塔、断线等事故,对基于阻尼耗能原理的风振抑制措施进行研究。首先,采用有限元分析软件ANSYS,分析输电塔线体系的风致振动响应;然后,提出基于阻尼器耗能原理的输电塔振动抑制策略,根据杆塔的结构特点,设计并比较分析多种阻尼器布置方案对风振的抑制效果。最后,在广东省某线路上实施该方案,在2012-08"启德"台风登陆期间,在9-10级台风(风速21-24 m/s)时,监测到输电塔的振动加速度。研究结果表明:将阻尼器布置在塔身中上部主材上可以更有效地消耗风振能量,控制风振幅值;采用该方案测得"启德"台风登陆期间输电塔的振动加速度下降60%-70%,为输电线路防强风灾害防治、提高线路容灾能力提供了一种有效方法。
Because the wind-induced vibration of transmission tower may reduce the fatigue strength of the transmission rod/tower,wire and hardware connections,and in severe cases can lead to tower or rod fall,the wind-induced vibration reduction was researched based on energy dissipation principle of damper.Firstly,the wind-induced vibration response of transmission tower-line system was analyzed with ANSYS software.Secondly,the vibration reduction strategy of transmission tower was put forward based on energy dissipation principle of damper.The effect of wind-induced vibration reduction with different damper layouts was designed and compared.At last,the program mentioned was implemented into transmission tower in Guangdong Province during the typhoon "Kai Tak" in August 2012.The results show that the wind-induced vibration energy can be dissipated effectively,as well as the amplitude of wind-induced vibration.During the typhoon "Kai Tak" in August 2012,the vibration acceleration of transmission tower is decreased by 60%-70% during 9-10 typhoon(speed at 21-24 m/s),which shows that it is an effective way to prevent strong winds disaster and improves the disaster prevention capacity.
Because the wind-induced vibration of transmission tower may reduce the fatigue strength of the transmission rod/tower,wire and hardware connections,and in severe cases can lead to tower or rod fall,the wind-induced vibration reduction was researched based on energy dissipation principle of damper.Firstly,the wind-induced vibration response of transmission tower-line system was analyzed with ANSYS software.Secondly,the vibration reduction strategy of transmission tower was put forward based on energy dissipation principle of damper.The effect of wind-induced vibration reduction with different damper layouts was designed and compared.At last,the program mentioned was implemented into transmission tower in Guangdong Province during the typhoon "Kai Tak" in August 2012.The results show that the wind-induced vibration energy can be dissipated effectively,as well as the amplitude of wind-induced vibration.During the typhoon "Kai Tak" in August 2012,the vibration acceleration of transmission tower is decreased by 60%-70% during 9-10 typhoon(speed at 21-24 m/s),which shows that it is an effective way to prevent strong winds disaster and improves the disaster prevention capacity.
引文
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[14]ZHANG Rihui,Soong T T.Seismic design of viscoelasticdampers for structural applications[J].Journal of StructuralEngineering,1992,118(5):1375-1392.
[15]周云,徐赵东,赵鸿铁.黏弹性阻尼机构的性能、分析方法及工程应用[J].地震工程与工程振动,1998,18(3):96107.ZHOU Yun,XU Zhaodong,ZHAO Hongtie.Study on behavior,analytical methods and application of viscoelastic structure[J].Earthquake Engineering and Engineering Vibration,1998,18(3):96-107.
[2]Chang K C,Lin Y Y.Seismic design structures with addedstructures with added viscoelastic dampers[C]//Eleventh WorldConference on Earthquake Engineering.1996.
[3]江宜城,钟寅亥,樊剑,等.黏弹性阻尼器控制下大跨越输电塔风振响应分析[J].钢结构,2003,18(4):3436.JIANG Yicheng,ZHONG Yinhai,FAN Jian.Wind vibrationresponses analyses for electrical transmission tower withviscoelastic dampers under wind load[J].Steel Construction,2003,18(4):34-36.
[4]祝辉.弹塑性结构的主动和半主动控制研究[D].重庆:重庆大学土木工程学院,2009:1105.ZHU Hui.Research on active and semi-active control ofstructure considering of elasto-plastic[D].Chongqing:Chongqing University.College of Civil Engineering,2009:1-105.
[5]张勇.输电线路风灾防御的现状与对策[J].华东电力,2006,34(3):28-31.ZHANG Yong.Status quo of wind hazard prevention fortransmission lines and countermeasures[J].East China ElectricPower,2006,34(3):28-31.
[6]吕和祥,于洪洁,裘春航.动力学方程的解析逐步积分法[J].工程力学,2001,18(5):17.LüHexiang,YU Hongjie,QIU Chunhang.An analyticalstep-by-step integral procedure of dynamics equations[J].Engineering Mechanics,2001,18(5):1-7.
[7]徐建国,石华军,郭勇,等.大跨越输电塔线体系有限元建模[J].电力建设,2011,32(3):1519.XU Jianguo,SHI Huajun,GUO Yong,et al.Finite elementmodeling of long span transmission line system[J].ElectricPower Construction,2011,32(3):15-19.
[8]梁政平,尹鹏,胡亮霞,等.大跨越输电塔线体系的风控效果研究[J].土木工程学报,2010,43(S1):259265.LIANG Zhengping,YIN Peng,HU Liangxia,et al.Investigationon controlling effect of large-span transmission tower-linesystem[J].China Civil Engineering Journal,2010,43(S1):259-265.
[9]王世村,杨晓强.高耸结构风振疲劳的随机裂纹扩展分析[J].钢结构,2007,22(8):4347.WANG Shicun,YANG Xiaoqiang.Stochastic analysis of fatiguecrack growth for high-rise structures under wind loading[J].Steel Construction,2007,22(8):43-47.
[10]王肇民.高耸结构设计手册[M].北京:中国建筑工业出版社,1995:10-50.WANG Zhaomin.Towering structure design handbook[M].Beijing:China Building Industry Press,1995:10-50.
[11]Kirekawa A,Ito Y,Asano K.Study of structural control usingviscoelastic material[C]//Earthquake Engineering TenthConference 1992-Balkema.Rotterdam,1992.
[12]李虎.黏弹性阻尼器对超高层结构的风振控制[D].武汉:武汉理工大学土木工程与建筑学院,2007:161.LI Hu.Wind vibration control for super high-rise buildings withviscoelastic dampers[D].Wuhan:Wuhan University ofTechnology.School of Civil Engineering and Architecture,2007:1-61.
[13]周云.黏弹性阻尼减振结构设计[M].武汉:武汉理工大学出版社,2006:2070.ZHOU Yun.Viscoelastic damper design[M].Wuhan:Wuhan:Wuhan University of Technology Press,2006:20-70.
[14]ZHANG Rihui,Soong T T.Seismic design of viscoelasticdampers for structural applications[J].Journal of StructuralEngineering,1992,118(5):1375-1392.
[15]周云,徐赵东,赵鸿铁.黏弹性阻尼机构的性能、分析方法及工程应用[J].地震工程与工程振动,1998,18(3):96107.ZHOU Yun,XU Zhaodong,ZHAO Hongtie.Study on behavior,analytical methods and application of viscoelastic structure[J].Earthquake Engineering and Engineering Vibration,1998,18(3):96-107.
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