钢管组合大跨越输电塔结构动力特性研究
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摘要
利用有限元分析软件ANSYS建立了钢管组合大跨越输电塔SZK系列的杆梁混合分析模型,采用子空间迭代法得到了结构的前5阶模态,对比以实测所得的周期近似公式,经过修正得到了该类结构的不考虑导地线影响的更加精确的第一阶周期计算公式.文章进一步考虑导地线的影响,研究不同垂直档距下输电塔的动力特性,了解了结构动力特性的变化特点,并引进考虑导地线影响的周期放大系数,修正了第一阶周期计算公式.分析研究对输电塔的抗震、抗风设计有一定参考意义.
With ANSYS program of the finite element method,a new analytical-numerical model combining beam and truss elements for the structure analysis of combo steel tube tower for large crossing transmission lines is established.The initial 5 modes including vibration modes and frequencies are acquired by using subspace iteration method.After contrasting the first period between numerical theoretic and approximate formula value,the revised approximate formula for estimating the structural free vibration period under no cables is achieved which improves result accuracy.In addition,the dynamic characteristics of the tower which vary vertical span of transmission lines are analyzed and found out some available conclusions where cables are taken into account.Finally,By introducing magnifying coefficient of period for effect on cables,one valid formula considering cables effect is presented.The above research and analysis have some reference values for seismic and wind resistance design of similar transmission tower.
With ANSYS program of the finite element method,a new analytical-numerical model combining beam and truss elements for the structure analysis of combo steel tube tower for large crossing transmission lines is established.The initial 5 modes including vibration modes and frequencies are acquired by using subspace iteration method.After contrasting the first period between numerical theoretic and approximate formula value,the revised approximate formula for estimating the structural free vibration period under no cables is achieved which improves result accuracy.In addition,the dynamic characteristics of the tower which vary vertical span of transmission lines are analyzed and found out some available conclusions where cables are taken into account.Finally,By introducing magnifying coefficient of period for effect on cables,one valid formula considering cables effect is presented.The above research and analysis have some reference values for seismic and wind resistance design of similar transmission tower.
引文
[1]李泽.大跨越输电塔线体系地震反应分析[D].同济大学博士论文.2002,4.LI Ze.Seismic response analysis of tower for large crossing transmission lines[D].The doctor dissertation of Tongji University.2002,4.
[2]GB 50260-96,电力设施抗震设计规范[S].GB 50260-96,Code for design of seismic of electrical installations[S].
[3]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):28-36.LI Hong-nan,WANG Qian-xin.Dynamic characteristics of tower for large crossing transmission lines[J].China Civil EngineeringJournal,1997,30(5):28-36.
[4]李宏男,王苏岩,班文卓.大跨越输电塔体系的抗震计算模型[J],特种结构,1998,15(3):47-50.LI Hong-nan,WANG Su-yan,BAN Wen-zhuo.Seismic analysis model of tower for large crossing transmission lines[J].SpecialStructure,1998,15(3):47-50.
[5]李宏男,石文龙,王苏岩.高压输电塔—导线耦联体系的简化抗震计算方法[J],特种结构,2002,(3):58-61.LI Hong-nan,SHI Wen-long,WANG Su-yan.Simplified aseismic method of tower for large crossing transmission lines[J].SpecialStructure,2002,(3):58-61.
[6]李宏男,石文龙等.考虑导线影响的输电塔侧向简化抗震计算方法[J].振动工程学报,2003,16(2):234-237.LI Hong-nan,SHI Wen-long,et al.Simplified aseismic calculation method considering effects of lines on transmission tower[J].Journal of Vibration Engineering,2003,16(2):234-237.
[7]石文龙,贾连光,李宏男.竖向振动时导线对高压输电塔体系的影响[J].沈阳建筑工程学院学报(自然科学版),2001,17(4):262-264.SHI Wen-long,JIA Lian-guang LI Hong-nan.The effects of power lines transmission tower under vertical vibration[J].Journal ofShenyang Arch.and Civ.Eng.Univ.(Natural Science Edition),2001,17(4):262-264.
[8]傅鹏程,邓洪洲,吴静.输电塔结构动力特性研究[J].特种结构,2005,22(1):47-49.FU Peng-cheng,DENG Hong-zhou,WU jing.Research on dynamic characteristics of transmission tower[J].Special Structure,2005,22(1):47-49.
[9]周新华.高压输电铁塔结构强度分析[D].华北电力大学(保定)硕士论文.2002,12.ZHOU Xin-hua.Strength analysis of transmission tower[D].The master dissertation of North China Electric Power University(Baod-ing).2002,12.
[10]胡大柱,李宏男,贾连光,等.地震作用下输电铁塔非线性动力反应分析[J].沈阳建筑工程学院学报(自然科学版),2004,20(2):94-96.HU Da-zhu,LI Hong-nan,JIA Lian-guang,et al.Nolinear dynamic analysis on the transmission tower subjected to earthquake ac-tion[J].Journal of Shenyang Arch.and Civ.Eng.Univ.(Natural Science Edition),2004,20(2):94-96.
[2]GB 50260-96,电力设施抗震设计规范[S].GB 50260-96,Code for design of seismic of electrical installations[S].
[3]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):28-36.LI Hong-nan,WANG Qian-xin.Dynamic characteristics of tower for large crossing transmission lines[J].China Civil EngineeringJournal,1997,30(5):28-36.
[4]李宏男,王苏岩,班文卓.大跨越输电塔体系的抗震计算模型[J],特种结构,1998,15(3):47-50.LI Hong-nan,WANG Su-yan,BAN Wen-zhuo.Seismic analysis model of tower for large crossing transmission lines[J].SpecialStructure,1998,15(3):47-50.
[5]李宏男,石文龙,王苏岩.高压输电塔—导线耦联体系的简化抗震计算方法[J],特种结构,2002,(3):58-61.LI Hong-nan,SHI Wen-long,WANG Su-yan.Simplified aseismic method of tower for large crossing transmission lines[J].SpecialStructure,2002,(3):58-61.
[6]李宏男,石文龙等.考虑导线影响的输电塔侧向简化抗震计算方法[J].振动工程学报,2003,16(2):234-237.LI Hong-nan,SHI Wen-long,et al.Simplified aseismic calculation method considering effects of lines on transmission tower[J].Journal of Vibration Engineering,2003,16(2):234-237.
[7]石文龙,贾连光,李宏男.竖向振动时导线对高压输电塔体系的影响[J].沈阳建筑工程学院学报(自然科学版),2001,17(4):262-264.SHI Wen-long,JIA Lian-guang LI Hong-nan.The effects of power lines transmission tower under vertical vibration[J].Journal ofShenyang Arch.and Civ.Eng.Univ.(Natural Science Edition),2001,17(4):262-264.
[8]傅鹏程,邓洪洲,吴静.输电塔结构动力特性研究[J].特种结构,2005,22(1):47-49.FU Peng-cheng,DENG Hong-zhou,WU jing.Research on dynamic characteristics of transmission tower[J].Special Structure,2005,22(1):47-49.
[9]周新华.高压输电铁塔结构强度分析[D].华北电力大学(保定)硕士论文.2002,12.ZHOU Xin-hua.Strength analysis of transmission tower[D].The master dissertation of North China Electric Power University(Baod-ing).2002,12.
[10]胡大柱,李宏男,贾连光,等.地震作用下输电铁塔非线性动力反应分析[J].沈阳建筑工程学院学报(自然科学版),2004,20(2):94-96.HU Da-zhu,LI Hong-nan,JIA Lian-guang,et al.Nolinear dynamic analysis on the transmission tower subjected to earthquake ac-tion[J].Journal of Shenyang Arch.and Civ.Eng.Univ.(Natural Science Edition),2004,20(2):94-96.
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