交流输电线路绝缘子破坏后的结构非线性有限元分析
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摘要
为了探讨绝缘子破坏失效对交流塔输电线路结构的受力影响,研究了适用于分析构件失效后输电线路结构动响应的宏观建模方法,包括输电塔建模、输电导线建模和绝缘子建模;采用瞬态动力分析方法计算了高压交流输电线路耐张段一基塔在发生上横担一组绝缘子突然断裂破坏后,邻近破坏处的导线、绝缘子、塔构件的动态张力.分析结果表明,上横担一组绝缘子破坏失效后,破坏档未破坏端导线的张力超过了技术规程中的设计值;导线的跌落对破坏档未破坏端的上横担绝缘子受力有较大的影响,而对上横担杆件没有明显的影响.
In order to study the dynamic response of high voltage transmission lines with drum type towers under mechanical faults of insulators,the non-linear dynamic finite element model of AC(alternating current) high voltage transmission line system,including transmission tower,transmission line and insulator,was established.The transient dynamic analysis method is proposed to analyze the variation law of dynamic response under insulator rupture,and the dynamic response of structural elements next to the broken span is calculated.The results show that the peak tension in the conductor of the upper crossarm at the suspension point exceeds the design value.Insulator rupture has no effect on the tower components of the upper crossarm,but it has a significant influence on the insulator tension of the upper crossarm.
In order to study the dynamic response of high voltage transmission lines with drum type towers under mechanical faults of insulators,the non-linear dynamic finite element model of AC(alternating current) high voltage transmission line system,including transmission tower,transmission line and insulator,was established.The transient dynamic analysis method is proposed to analyze the variation law of dynamic response under insulator rupture,and the dynamic response of structural elements next to the broken span is calculated.The results show that the peak tension in the conductor of the upper crossarm at the suspension point exceeds the design value.Insulator rupture has no effect on the tower components of the upper crossarm,but it has a significant influence on the insulator tension of the upper crossarm.
引文
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[2]张畅生,方子帆.高压输电线路合成绝缘子断裂机理研究[J].绝缘材料,2002,35(1):27-28.Zhang Changsheng,Fang Zifan.Rupture mechanism ofcomposite insulator for transmitting electricity line ofhigh voltage[J].Insulating Materials,2002,35(1):27-28.(in Chinese)
[3]McClure G,Lapointe M.Modeling the structural dy-namic response of overhead transmission lines[J].Computers and Structures,2003,81(8):41-56.
[4]Vincent P,Huet C,Charbonneau M,et al.Testing andnumerical simulation of overhead transmission line dy-namics under component failure conditions[C]//Con-ference International des Grands Reseaux Electriques.Paris,France,2004:1-8.
[5]Yoji Shimo.Development of power transmission line in-spection system by unmanned helicopter[C]//Confer-ence International des Grands Reseaux Electriques.Par-is,France,2006:B2/D2-106.
[6]Clark M,Richards D J,Clutterbuck D,et al.Measureddynamic performance of electricity transmission towersfollowing controlled broken-wire events[C]//Confer-ence International des Grands Reseaux Electriques.Par-is,France,2006:B2-313.
[7]梁枢果,朱继华,王力争.大跨越输电塔-线体系动力特性分析[J].地震工程与工程振动,2003,23(6):63-69.Liang Shuguo,Zhu Jihua,Wang Lizheng.Analysis ofdynamic characters of electrical transmission tower-linesystem with a big span[J].Earthquake Engineeringand Engineering Vibration,2003,23(6):63-69.(inChinese)
[8]石文龙,李宏男,贾连光.输电塔-导线耦联体系模型的振动台试验研究[J].工程力学,2006,23(5):89-93.Shi Wenlong,Li Hongnan,Jia Lianguang.Shaking ta-ble test of coupled system of transmission lines and tow-ers[J].Engineering Mechanics,2006,23(5):89-93.(in Chinese)
[9]Lapointe M.Dynamic analysis of a power line subjectedto longitudinal loads[D].Montreal,Canada:The De-partment of Civil Engineering and Applied Mechanics,McGill University,2002.
[10]邓洪洲,朱松晔,陈亦,等.大跨越输电塔线体系风振控制研究[J].建筑结构学报,2003,24(4):60-64.Deng Hongzhou,Zhu Songye,Chen Yi,et al.Studyon wind-induced vibration control of long span trans-mission line system[J].Journal of Building Struc-tures,2003,24(4):60-64.(in Chinese)
[11]Roshan Fekr M,McClure G.Numerical modeling ofthe dynamic response of ice-shedding on electricaltransmission lines[J].Atmospheric Research,1998,46(1/2):1-11.
[12]王勖成.有限单元法[M].北京:清华大学出版社,2003.
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