基于有限元分析的强风环境下引流线断股机理研究
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摘要
为探索强风环境下的引流线断股机理,建立了超高压输电线路六相引流线的宏观有限元模型和单根LGJ-400/50型钢芯铝绞线的微观有限元模型。首先基于宏观模型研究了引流线在强风环境下大幅度摆动的动力学行为,继而将宏观模型的计算结果导入微观模型,细致分析了单根导线在弯曲变形下的应力分布状况。然后结合有限元计算模拟数据进行试验验证,结果表明,引流线遇7级以上大风时会发生过度弯曲,并在线夹压接根部附近区域产生宏观塑性变形,最终发生疲劳断股。经分析得出强风环境下的引流线断股机理是多频次宏观塑性变形导致的低周疲劳断裂。
In order to explore the causes of frequent fracture accidents in strong wind,two finite element models were established respectively.One was a macro structure of six lead lines and the other was a micro model of a single line with materials of LGJ-400/50 ACSR(aluminum conductor steel reinforced).Firstly,the swing behavior of lines in strong wind was studied according to the macro model.Then,the calculation results were applied to the micro model to analyze the stress distribution of a single wire under a large-angle bending deformation.The simulation results were verified in the latter experiment.It is found that when the lead line meets a Force 7 wind or higher,excessive bending will occur and macroscopic plastic deformation is produced near the root of the clamp joint.Finally,the fatigue fracture begins.It is concluded that the mechanism for fracture of the lead line is a kind of low-cycle fatigue fracture which is caused by multi-frequency macroscopic plastic deformation.
In order to explore the causes of frequent fracture accidents in strong wind,two finite element models were established respectively.One was a macro structure of six lead lines and the other was a micro model of a single line with materials of LGJ-400/50 ACSR(aluminum conductor steel reinforced).Firstly,the swing behavior of lines in strong wind was studied according to the macro model.Then,the calculation results were applied to the micro model to analyze the stress distribution of a single wire under a large-angle bending deformation.The simulation results were verified in the latter experiment.It is found that when the lead line meets a Force 7 wind or higher,excessive bending will occur and macroscopic plastic deformation is produced near the root of the clamp joint.Finally,the fatigue fracture begins.It is concluded that the mechanism for fracture of the lead line is a kind of low-cycle fatigue fracture which is caused by multi-frequency macroscopic plastic deformation.
引文
[1]张进谦.西电东送战略研究[J].水力发电,1999(10):31-35.ZHANG Jinqian.Strategy study on the power transmission from west to east[J].Water Power,1999(10):31-35.(in Chinese)
[2]周小谦.我国“西电东送”的发展历史、规划和实施[J].电网技术,2003,27(5):1-5.ZHOU Xiaoqian.Development,planning and implementation of the project of power transmission from West China to East China[J].Power System Technology,2003,27(5):1-5.(in Chinese)
[3]蔡高雷,孙谊媊,袁铁江,等.极端气象环境下新疆电网应急与恢复体系基本框架设计[J].电力电容器与无功补偿,2016,37(4):79-86.CAI Gaolei,SUN Yiqian,YUAN Tiejiang,et al.Basic framework design of emergency recovery system for Xinjiang grid at extreme weather condition[J].Power Capacitor&Reactive Power Compensation,2016,37(4):79-86.(in Chinese)
[4]孙珍茂,楼文娟.覆冰输电导线舞动非线性有限元分析[J].电网技术,2010,34(12):214-218.SUN Zhenmao,LOU Wenjuan.Nonlinear finite element analysis on galloping of ice-coated transmission line[J].Power System Technology,2010,34(12):214-218.(in Chinese)
[5]杨新华,王丽新,王乘,等.考虑多种影响因素的导线舞动三维有限元分析[J].动力学与控制学报,2004,2(4):84-89.YANG Xinhua,WANG Lixin,WANG Cheng,et al.3Dfinite element analysis of transmission line galloping invoving multi factors[J].Journal of Dynamics and Control,2004,2(4):84-89.(in Chinese)
[6]胡春梅,景乾明,王明哲,等.输电导线舞动仿真的虚拟再现技术研究[J].中国电力,2013,46(11):17-21.HU Chunmei,JING Qianming,WANG Mingzhe,et al.Research on virtual reality technology for galloping simulation of power transmission lines[J].Electric Power,2013,46(11):17-21.(in Chinese)
[7]赵莉,严波,蔡萌琦,等.输电塔线体系中覆冰导线舞动数值模拟研究[J].振动与冲击,2013,32(18):113-120.ZHAO Li,YAN Bo,CAI Mengqi,et al.Numerical simulation for galloping of iced conductors in a transmission tower-line system[J].Journal of Vibration and Shock,2013,32(18):113-120.(in Chinese)
[8]孟遂民,祝一帆,唐波,等.考虑覆冰厚度的输电线路覆冰增长预测[J].中国科技论文,2017,12(11):1274-1275.MENG Suimin,ZHU Yifan,TANG Bo,et al.Prediction of ice accretion on transmission lines considering icing thickness[J].China Sciencepaper,2017,12(11):1274-1275.(in Chinese)
[9]AZEVEDO C R F,HENRIQUES A,FILHO A R P,et al.Fretting fatigue in overhead conductors:rig design and failure analysis of a Grosbeak aluminium cable steel reinforced conductor[J].Engineering Failure A-nalysis,2009,16(1):136-151.
[10]AZEVEDO C R F,CESCON T.Failure analysis of aluminum cable steel reinforced(ACSR)conductor of the transmission line crossing the Paranáriver[J].Engineering Failure Analysis,2002,9(6):645-664.
[11]CHEN G,WANG X,WANG J,et al.Damage investigation of the aged aluminium cable steel reinforced(AC-SR)conductors in a high-voltage transmission line[J].Engineering Failure Analysis,2012,19:13-21.
[12]FADEL A A,ROSA D,MURA L B,et al.Effect of high mean tensile stress on the fretting fatigue life of an Ibis steel reinforced aluminium conductor[J].International Journal of Fatigue,2012,42:24-34.
[13]ZHOU Z R,CARDOU A,FISET M,et al.Fretting fatigue in electrical transmission lines[J].Wear,1994,173(1/2):179-188.
[14]赵萍.航空发动机单晶叶片的多轴低周疲劳研究[D].长沙:中南大学,2011.ZHAO Ping.Multiaxial low cycle fatigue study of aeroengine single crystal blades[D].Changsha:Central South University,2011.(in Chinese)
[15]刘伯权,白绍良.钢筋混凝土柱低周疲劳性能的试验研究[J].地震工程与工程振动,1998,18(4):82-89.LIU Boquan,BAI Shaoliang.Experimental study of low-cycle behavior of concrete columns[J].Earthquake Engineering and Engineering Vibration,1998,18(4):82-89.(in Chinese)
[16]郑成坤,张卫文,林波,等.挤压铸造Al-7.1Zn-2.4Mg-2.1Cu-0.55Fe合金的低周疲劳行为研究[J].热加工工艺,2015,44(19):51-54.ZHENG Chengkun,ZHANG Weiwen,LIN Bo,et al.Low cycle fatigue behavior of squeeze cast Al-7.1Zn-2.4Mg-2.1Cu-0.55Fe alloy[J].Hot Working Technology,2015,44(19):51-54.(in Chinese)
[17]胡慧玲,林纯镇,吴惟敏.理论力学基础教程[M].北京:高等教育出版社,1986:56-60.HU Huiling,LIN Chunzhen,WU Weimin.Basic course of theoretical mechanics[M].Beijing:Higher Education Press,1986:56-60.(in Chinese)
[18]于良.考虑低周疲劳特性的滞回阻尼器建筑物结构的地震破坏准则[J].世界地震工程,2000,16(1):61-64.YU Liang.Seismic damage critera of structures with hysteretic dampers taking account of low-cycle fatigue characters[J].World Information on Earthquake Engineering,2000,16(1):61-64.(in Chinese)
[19]GENG Changjian,WU Baolin,DU Xinghao,et al.Low cycle fatigue behavior of extruded AZ31Bmagnesium alloy[J].Transactions of Nonferrous Metals Society of China,2013(6):1589-1594.
[2]周小谦.我国“西电东送”的发展历史、规划和实施[J].电网技术,2003,27(5):1-5.ZHOU Xiaoqian.Development,planning and implementation of the project of power transmission from West China to East China[J].Power System Technology,2003,27(5):1-5.(in Chinese)
[3]蔡高雷,孙谊媊,袁铁江,等.极端气象环境下新疆电网应急与恢复体系基本框架设计[J].电力电容器与无功补偿,2016,37(4):79-86.CAI Gaolei,SUN Yiqian,YUAN Tiejiang,et al.Basic framework design of emergency recovery system for Xinjiang grid at extreme weather condition[J].Power Capacitor&Reactive Power Compensation,2016,37(4):79-86.(in Chinese)
[4]孙珍茂,楼文娟.覆冰输电导线舞动非线性有限元分析[J].电网技术,2010,34(12):214-218.SUN Zhenmao,LOU Wenjuan.Nonlinear finite element analysis on galloping of ice-coated transmission line[J].Power System Technology,2010,34(12):214-218.(in Chinese)
[5]杨新华,王丽新,王乘,等.考虑多种影响因素的导线舞动三维有限元分析[J].动力学与控制学报,2004,2(4):84-89.YANG Xinhua,WANG Lixin,WANG Cheng,et al.3Dfinite element analysis of transmission line galloping invoving multi factors[J].Journal of Dynamics and Control,2004,2(4):84-89.(in Chinese)
[6]胡春梅,景乾明,王明哲,等.输电导线舞动仿真的虚拟再现技术研究[J].中国电力,2013,46(11):17-21.HU Chunmei,JING Qianming,WANG Mingzhe,et al.Research on virtual reality technology for galloping simulation of power transmission lines[J].Electric Power,2013,46(11):17-21.(in Chinese)
[7]赵莉,严波,蔡萌琦,等.输电塔线体系中覆冰导线舞动数值模拟研究[J].振动与冲击,2013,32(18):113-120.ZHAO Li,YAN Bo,CAI Mengqi,et al.Numerical simulation for galloping of iced conductors in a transmission tower-line system[J].Journal of Vibration and Shock,2013,32(18):113-120.(in Chinese)
[8]孟遂民,祝一帆,唐波,等.考虑覆冰厚度的输电线路覆冰增长预测[J].中国科技论文,2017,12(11):1274-1275.MENG Suimin,ZHU Yifan,TANG Bo,et al.Prediction of ice accretion on transmission lines considering icing thickness[J].China Sciencepaper,2017,12(11):1274-1275.(in Chinese)
[9]AZEVEDO C R F,HENRIQUES A,FILHO A R P,et al.Fretting fatigue in overhead conductors:rig design and failure analysis of a Grosbeak aluminium cable steel reinforced conductor[J].Engineering Failure A-nalysis,2009,16(1):136-151.
[10]AZEVEDO C R F,CESCON T.Failure analysis of aluminum cable steel reinforced(ACSR)conductor of the transmission line crossing the Paranáriver[J].Engineering Failure Analysis,2002,9(6):645-664.
[11]CHEN G,WANG X,WANG J,et al.Damage investigation of the aged aluminium cable steel reinforced(AC-SR)conductors in a high-voltage transmission line[J].Engineering Failure Analysis,2012,19:13-21.
[12]FADEL A A,ROSA D,MURA L B,et al.Effect of high mean tensile stress on the fretting fatigue life of an Ibis steel reinforced aluminium conductor[J].International Journal of Fatigue,2012,42:24-34.
[13]ZHOU Z R,CARDOU A,FISET M,et al.Fretting fatigue in electrical transmission lines[J].Wear,1994,173(1/2):179-188.
[14]赵萍.航空发动机单晶叶片的多轴低周疲劳研究[D].长沙:中南大学,2011.ZHAO Ping.Multiaxial low cycle fatigue study of aeroengine single crystal blades[D].Changsha:Central South University,2011.(in Chinese)
[15]刘伯权,白绍良.钢筋混凝土柱低周疲劳性能的试验研究[J].地震工程与工程振动,1998,18(4):82-89.LIU Boquan,BAI Shaoliang.Experimental study of low-cycle behavior of concrete columns[J].Earthquake Engineering and Engineering Vibration,1998,18(4):82-89.(in Chinese)
[16]郑成坤,张卫文,林波,等.挤压铸造Al-7.1Zn-2.4Mg-2.1Cu-0.55Fe合金的低周疲劳行为研究[J].热加工工艺,2015,44(19):51-54.ZHENG Chengkun,ZHANG Weiwen,LIN Bo,et al.Low cycle fatigue behavior of squeeze cast Al-7.1Zn-2.4Mg-2.1Cu-0.55Fe alloy[J].Hot Working Technology,2015,44(19):51-54.(in Chinese)
[17]胡慧玲,林纯镇,吴惟敏.理论力学基础教程[M].北京:高等教育出版社,1986:56-60.HU Huiling,LIN Chunzhen,WU Weimin.Basic course of theoretical mechanics[M].Beijing:Higher Education Press,1986:56-60.(in Chinese)
[18]于良.考虑低周疲劳特性的滞回阻尼器建筑物结构的地震破坏准则[J].世界地震工程,2000,16(1):61-64.YU Liang.Seismic damage critera of structures with hysteretic dampers taking account of low-cycle fatigue characters[J].World Information on Earthquake Engineering,2000,16(1):61-64.(in Chinese)
[19]GENG Changjian,WU Baolin,DU Xinghao,et al.Low cycle fatigue behavior of extruded AZ31Bmagnesium alloy[J].Transactions of Nonferrous Metals Society of China,2013(6):1589-1594.
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