风雨荷载作用下输电塔动力响应分析
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摘要
研究输电塔在风雨荷载共同作用下的动力响应,提出了改进的雨荷载计算方法。针对雨滴在风作用下的受力情况,计算出雨滴作用到输电塔构件上的夹角,得出改进的雨压强计算公式和时程曲线,利用ANSYS软件将风雨荷载加载到有限元模型上进行动力响应分析,得出输电塔顶端的顺风向最大位移。研究表明,改进的雨荷载压强公式是简单可行的,输电塔顶端的顺风向最大位移的变化趋势显著。
In order to study the transmission tower dynamic response under the conjunct function of wind and rain loads,this thesis proposes a revised wind load calculation method based on previous rain load pressure formula.According to the raindrop force state under wind load,the angle relative to transmission tower structure was calculatai,and rain pressure formula with angle and previous rain pressure formula was revised,by using MATLAB program language getting wind and rain load travel-time curve,then making wind and rain load act on ANSYS element model to get the maximum displacement on the top of transmission tower.Using revised rain load pressure formula,the maximum horizontal displacement at the top of transmission tower increase from 0.036 3 m to 0.423 m correspondingly with the increase of rain strength under the effect of 6 wind velocity whose speed is 13 m/s.the result shows that the advised rain load pressure is feasible and simple and the variability trend of the maximum horizontal displacement at the top of transmission tower is obvious.It provides theory foundation for transmission tower design under the conjunct function wind and rain loads.
In order to study the transmission tower dynamic response under the conjunct function of wind and rain loads,this thesis proposes a revised wind load calculation method based on previous rain load pressure formula.According to the raindrop force state under wind load,the angle relative to transmission tower structure was calculatai,and rain pressure formula with angle and previous rain pressure formula was revised,by using MATLAB program language getting wind and rain load travel-time curve,then making wind and rain load act on ANSYS element model to get the maximum displacement on the top of transmission tower.Using revised rain load pressure formula,the maximum horizontal displacement at the top of transmission tower increase from 0.036 3 m to 0.423 m correspondingly with the increase of rain strength under the effect of 6 wind velocity whose speed is 13 m/s.the result shows that the advised rain load pressure is feasible and simple and the variability trend of the maximum horizontal displacement at the top of transmission tower is obvious.It provides theory foundation for transmission tower design under the conjunct function wind and rain loads.
引文
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[8]李宏男,李雪,李刚,等.冻雨输电塔—线体系风致动力响应分析[J].防灾减灾工程学报,2008,28(2):127-129.Li Hongnan,Li Xue,Li Gang,et al.Sleet transmis-sion tower line system dynamic response analysis[J].Journal of disaster prevention and mitigation en-gineering,2008,28(2):127-129.(in Chinese)
[9]刘群,杨进春,周粼波.高压架空输电线路钢结构塔架与导线风致耦合振动现象研究.中国电力.1997,30(9):50-52.Liu Qun,Yang Jinchun,Zhou Linbo.A high-voltageoverhead transmission line steel tower and the leadcharacter coupling vibration research.China electricpower.1997,30(9):50-52.(in Chinese)
[10]张朝阳,王海期,孙炳楠等.多跨输电线平面振动特性的传递矩阵法分析.华中理工大学学报(自然科学版).1997,25(4):95-98.Zhang Zhaoyang,Wang Haiqi,Sun Bingnan,et al.Multiple span transmission line plane vibration trans-fer matrix method for the analysis of Huazhong Uni-versity of science and Technology(Natural ScienceEdition).1997,25(4):95-98.(in Chinese)
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[12]Macdonald A J.Wind Loading on Buildings[M].London:Applied Science Publishers,1975.
[13]Davenport A G.The spectrum of horizontal gustinessnear the gound in high winds[J].Journal of the Roy-al Meteorological Society,1961,(87):194-211.
[14]Shinozuka M,Jan C M.Digital simulation of randomprocesses and its applications[J].Journal of Soundand Vibration,1972,25(1):111-128.
[15]盛裴轩,毛节泰,李建国,等.大气物理学[M].北京:北京大学出版社,2003.Sheng Peixuan,Mao Jietai,Li Jianguo,et al.The at-mospheric physics[M].Beijing:Peking UniversityPress,2003.(in Chinese)
[16]任月明.风雨激励下输电塔线体系的动力响应分析[D].大连:大连理工大学,2007.Ren Yueming.Rain-wind-induced Dynamic ResponseAnalysis of Transmission tower-Line System[D].Dalian:Dalian University of Technology,2007.(inChinese)
[2]Battista R C,et al.Dynamic behavior and stability oftransmission line towers under wind forces[J].J.Wind Eng.Ind.Aerodyn,2003,(91):1051-1067.
[3]瞿伟廉,殷惠君,陈波.输电线路动力分析的多质点模型研究[J].华中科技大学学报,2003,20(2):3-4.Qu Weilian,Yin Huijun,Chen Bo.Power transmis-sion line dynamic analysis multi particles model[J].Journal of Huazhong University of Science and Tech-nology,2003,20(2):3-4.(in Chinese)
[5]李宏男,王前信.大跨越输电塔体系的动力特性[J].土木工程学报,1997,30(5):2-4.Li Hongnan,Wang Qianxin.Large span transmissiontower system dynamic characteristics[J].China Civ-il Engineering Journal,1997,30(5):2-4.(in Chi-nese)
[6]李宏男,王前信.输电塔—线耦联体系地震反应分析方法[J].地震工程与工程振动,1996,20(3):2-4.Li Hongnan,Wang Qianxin.Transmission tower linecoupling system analysis method for seismic responseof[J].Earthquake Engineering and Engineering Vi-bration,1996,20(3):2-4.(in Chinese)
[7]李宏男,白海峰.高压输电塔-线体系抗灾的研究现状与发展趋势.土木工程学报.2007,40(2):39-46.Li Hongnan,Bai Haifeng.High-voltage transmissiontower-line system resilience research situation and de-velopment trend.China Civil Engineering Journal,2007,40(2):39-46.(in Chinese)
[8]李宏男,李雪,李刚,等.冻雨输电塔—线体系风致动力响应分析[J].防灾减灾工程学报,2008,28(2):127-129.Li Hongnan,Li Xue,Li Gang,et al.Sleet transmis-sion tower line system dynamic response analysis[J].Journal of disaster prevention and mitigation en-gineering,2008,28(2):127-129.(in Chinese)
[9]刘群,杨进春,周粼波.高压架空输电线路钢结构塔架与导线风致耦合振动现象研究.中国电力.1997,30(9):50-52.Liu Qun,Yang Jinchun,Zhou Linbo.A high-voltageoverhead transmission line steel tower and the leadcharacter coupling vibration research.China electricpower.1997,30(9):50-52.(in Chinese)
[10]张朝阳,王海期,孙炳楠等.多跨输电线平面振动特性的传递矩阵法分析.华中理工大学学报(自然科学版).1997,25(4):95-98.Zhang Zhaoyang,Wang Haiqi,Sun Bingnan,et al.Multiple span transmission line plane vibration trans-fer matrix method for the analysis of Huazhong Uni-versity of science and Technology(Natural ScienceEdition).1997,25(4):95-98.(in Chinese)
[11]Davenport A G.The spectrum of horizontal gustinessnear the gound in high winds[J].Journal of the Roy-al Meteorological Society,1961,(87):194-211.
[12]Macdonald A J.Wind Loading on Buildings[M].London:Applied Science Publishers,1975.
[13]Davenport A G.The spectrum of horizontal gustinessnear the gound in high winds[J].Journal of the Roy-al Meteorological Society,1961,(87):194-211.
[14]Shinozuka M,Jan C M.Digital simulation of randomprocesses and its applications[J].Journal of Soundand Vibration,1972,25(1):111-128.
[15]盛裴轩,毛节泰,李建国,等.大气物理学[M].北京:北京大学出版社,2003.Sheng Peixuan,Mao Jietai,Li Jianguo,et al.The at-mospheric physics[M].Beijing:Peking UniversityPress,2003.(in Chinese)
[16]任月明.风雨激励下输电塔线体系的动力响应分析[D].大连:大连理工大学,2007.Ren Yueming.Rain-wind-induced Dynamic ResponseAnalysis of Transmission tower-Line System[D].Dalian:Dalian University of Technology,2007.(inChinese)
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