导地线对输电塔动力特性影响分析
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摘要
为研究输电线路中导地线对输电铁塔动力特性的影响,基于有限元软件ANSYS建立了输电塔及塔线体系有限元模型,采用仅考虑导地线质量作用、仅考虑导地线刚度作用、同时考虑导地线质量和刚度作用3种模型分别分析了输电塔动力特性,并与单塔模型进行了比较。结果表明,导地线的质量作用和刚度作用对输电铁塔动力特性均有影响,且质量作用影响较大,计算分析时不可忽略。
In order to research the effect of transmission line on the dynamic characteristics of power transmission towers,the finite element software ANSYS is applied to establish the model of transmission tower and tower-line system.The dynamic characteristics of power transmission towers are analyzed with three kinds of models,which include only considering the mass action of the transmission lines,only considering the stiffness action of the transmission lines,and considering both of the mass and stiffness action of the transmission lines.Compared with the single transmission tower model,the results show that both the mass and stiffness action of transmission line has impact on the dynamic characteristics of power transmission towers;meanwhile the mass action has larger effect,which can not be ignored in analysis and calculation.
In order to research the effect of transmission line on the dynamic characteristics of power transmission towers,the finite element software ANSYS is applied to establish the model of transmission tower and tower-line system.The dynamic characteristics of power transmission towers are analyzed with three kinds of models,which include only considering the mass action of the transmission lines,only considering the stiffness action of the transmission lines,and considering both of the mass and stiffness action of the transmission lines.Compared with the single transmission tower model,the results show that both the mass and stiffness action of transmission line has impact on the dynamic characteristics of power transmission towers;meanwhile the mass action has larger effect,which can not be ignored in analysis and calculation.
引文
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[5]肖琦,周凌风,蔡景素,等.紧凑型窄基输电塔AN-SYS建模及动力特性分析[J].水电能源科学,2011,29(2):167-168,186.
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[2]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.
[3]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.
[4]李宏男,石文龙,贾连光.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):233-237.
[5]肖琦,周凌风,蔡景素,等.紧凑型窄基输电塔AN-SYS建模及动力特性分析[J].水电能源科学,2011,29(2):167-168,186.
[6]刘振亚.国家电网公司输变电工程典型设计:500kV输电线路分册[M].北京:中国电力出版社,2007.
[7]赵滇生,金三爱.有限元模型对输电塔架结构动力特性分析的影响[J].特种结构,2004,21(3):8-11.
[8]冯云巍.输电塔架ANSYS建模及动力特性研究[J].钢结构,2008,23(1):21-23,31.
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