高压输电铁塔的地震响应
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摘要
以500kV交流高压双回路输电线路为研究对象,对线路中使用频率最高的直线塔和耐张塔进行了地震响应分析.首先,通过对铁塔模型的合理简化,建立了直线塔和耐张塔的杆梁混合单元有限元几何模型,分析了高压直线塔和耐张塔的动力学特性;然后,利用最小均方速度的基线校正方法对三向汶川地震波进行基线校正,以校正后的汶川地震波为激励获得了直线塔和耐张塔的地震时程响应;最后,分析了直线塔和耐张塔地震响应的频率结构.对应杆塔的动力学特性,频谱分析结果表明:无论是单向地震激励还是多向地震激励,都可以激起输电杆塔的共振区.所得结论对杆塔设计、舞动分析计算和输电线路安全运行有重要意义.
With the research object of 500 kV transmission line,do the seismic response analysis of strain tower and tangent tower which are used most frequently.At first,the finite element models including a strain tower,a tangent tower are created with the reasonable simplification of towers.And do the dynamic characteristics analyzes of strain tower and tangent tower.Then use the minimum square velocity method to correct the three direction seismic waves which collected form the earthquake in Wenchuan.Do the timehistory analysis of strain tower and tangent tower with the seismic wave which have been corrected.Finally,analyze the frequency composition of seismic response of strain tower and tangent tower.Compare with the dynamic characteristics results of tower,the frequency spectrum analysis results show that both unidirectional earthquake excitation and multi-directional earthquake excitation can arouse resonance region of transmission tower.The conclusion is significative for the tower design,the analysis of conductor galloping and the safe operation of the transmission line.
With the research object of 500 kV transmission line,do the seismic response analysis of strain tower and tangent tower which are used most frequently.At first,the finite element models including a strain tower,a tangent tower are created with the reasonable simplification of towers.And do the dynamic characteristics analyzes of strain tower and tangent tower.Then use the minimum square velocity method to correct the three direction seismic waves which collected form the earthquake in Wenchuan.Do the timehistory analysis of strain tower and tangent tower with the seismic wave which have been corrected.Finally,analyze the frequency composition of seismic response of strain tower and tangent tower.Compare with the dynamic characteristics results of tower,the frequency spectrum analysis results show that both unidirectional earthquake excitation and multi-directional earthquake excitation can arouse resonance region of transmission tower.The conclusion is significative for the tower design,the analysis of conductor galloping and the safe operation of the transmission line.
引文
[1]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 H N,WANG Q X.Dynamic characteristics of long-span transmission lines and their supporting towers[J].China Civil Engineering Journal,1997,30(5):28-36.
[2]全伟,李宏男,岳茂光.多点激励下输电塔-导线体系纵向地震反应分析[J].振动与冲击,2008,27(10):75-80.QUAN W,LI H N,YUE M G.Longitudinal response of a power transmission tower-cable system under multi support excitations[J].Journal of Vibration and Shock,2008,27(10):75-80.
[3]岳茂光,李宏男,王东升,等.行波激励下输电塔-导线体系纵向地震反应分析[J].中国电机工程学报,2006,26(23):145-150.YUE M G,LI H N,WANG D S,et al.Longitudinal response of the power transmission tower-cable system under traveling seismic wave excitations[J].Proceedings of the CSEE,2006,26(23):145-150.
[4]岳茂光,王东升,李宏男,等.近断层地震动作用下输电塔-导线体系反应分析[J].地震工程和工程振动,2005,25(4):116-125.YUE M G,WANG D S,LI H N,et al.Response of power transmission tower-cable system subjected to near-fault ground motions[J].Earthquake Engineering and Engineering Vibration,2005,25(4):116-125.
[5]沈国辉,孙炳楠,何运祥,等.大跨越输电塔线体系的地震响应研究[J].工程力学,2008,25(11):212-217.SHEN G H,SUN B N,HE Y X,et al.Seismic responses of long-span transmission tower-line system[J].Engineering Mechanics,2008,25(11):212-217.
[6]谢强,白杰,薛松涛.特高压交流同塔双回输电塔地震模拟振动台试验[J].高电压技术,2012,38(6):1410-1419.XIE Q,BAI J,XUE S T.Shake table test on UHV AC double circuit transmission tower[J].High Voltage Engineering,2012,38(6):1410-1419.
[7]谢强,白杰,薛松涛,等.1 000kV角钢塔地震模拟振动台试验研究[J].电网技术,2013,37(1):58-64.XIE Q,BAI J,XUE S T,et al.Shaking table test on 1 000kVangle steel transmission tower[J].Power System Technology,2013,37(1):58-64.
[8]田利,李宏男,李术才.多点地震激励下考虑地形变化输电塔线体系的响应分析[J].应用基础与工程科学学报,2013,21(2):257-266.TIAN L,LI H N,LI S C.Seismic response of transmission tower-line system considering topographic variation under multiple-support ground motion excitations[J].Journal of Basic Science and Engineering,2013,21(2):257-266.
[9]田利,李宏男,王文明.地震动空间变化对高压输电塔线体系地震反应的影响[J].振动与冲击,2013,32(8):79-87.TIAN L,LI H N,WANG W M.Effects of ground motion spatial variation on seismic response of a power transmission towerline system[J].Journal of Vibration and Shock,2013,32(8):79-87.
[10]田利,李宏男.多维多点地震动激励下折线型输电塔线体系反应分析[J].土木工程学报,2012,45(增刊1):131-135.TIAN L,LI H N.Seismic response of fold linear type transmission tower-line system under multi-component multisupport excitations[J].China Civil Engineering Journal,2012,45(Suppl.1):131-135.
[11]IRVINE H M.Cable structures[M].Cambridge:The MITPress,1981.
[12]OZONO S.In-plane dynamic interaction between a tower and conductors at lower frequencies[J].Engineering Structures,1991,14(4):210-216.
[13]YASUI H.Analytical study on wind-induced vibration of power transmission towers[J].Journal of Wind Engineering and Industrial Aerodynamics,1999,83(2):431-441.
[14]SUZUKI T.Seismic response characteristics of transmissions tower[C]∥10th WCEE.[S.l.]:Balkema Rotterdam,1922.
[15]骆文海.强震加速度波形积分时的基线修正[J].传感器技术,1991(3):23-26.LUO W H.Correction of datum line when integrating strongvibration acceleration wave-form[J].Journal of Transducer Technology,1991(3):23-26.
[2]全伟,李宏男,岳茂光.多点激励下输电塔-导线体系纵向地震反应分析[J].振动与冲击,2008,27(10):75-80.QUAN W,LI H N,YUE M G.Longitudinal response of a power transmission tower-cable system under multi support excitations[J].Journal of Vibration and Shock,2008,27(10):75-80.
[3]岳茂光,李宏男,王东升,等.行波激励下输电塔-导线体系纵向地震反应分析[J].中国电机工程学报,2006,26(23):145-150.YUE M G,LI H N,WANG D S,et al.Longitudinal response of the power transmission tower-cable system under traveling seismic wave excitations[J].Proceedings of the CSEE,2006,26(23):145-150.
[4]岳茂光,王东升,李宏男,等.近断层地震动作用下输电塔-导线体系反应分析[J].地震工程和工程振动,2005,25(4):116-125.YUE M G,WANG D S,LI H N,et al.Response of power transmission tower-cable system subjected to near-fault ground motions[J].Earthquake Engineering and Engineering Vibration,2005,25(4):116-125.
[5]沈国辉,孙炳楠,何运祥,等.大跨越输电塔线体系的地震响应研究[J].工程力学,2008,25(11):212-217.SHEN G H,SUN B N,HE Y X,et al.Seismic responses of long-span transmission tower-line system[J].Engineering Mechanics,2008,25(11):212-217.
[6]谢强,白杰,薛松涛.特高压交流同塔双回输电塔地震模拟振动台试验[J].高电压技术,2012,38(6):1410-1419.XIE Q,BAI J,XUE S T.Shake table test on UHV AC double circuit transmission tower[J].High Voltage Engineering,2012,38(6):1410-1419.
[7]谢强,白杰,薛松涛,等.1 000kV角钢塔地震模拟振动台试验研究[J].电网技术,2013,37(1):58-64.XIE Q,BAI J,XUE S T,et al.Shaking table test on 1 000kVangle steel transmission tower[J].Power System Technology,2013,37(1):58-64.
[8]田利,李宏男,李术才.多点地震激励下考虑地形变化输电塔线体系的响应分析[J].应用基础与工程科学学报,2013,21(2):257-266.TIAN L,LI H N,LI S C.Seismic response of transmission tower-line system considering topographic variation under multiple-support ground motion excitations[J].Journal of Basic Science and Engineering,2013,21(2):257-266.
[9]田利,李宏男,王文明.地震动空间变化对高压输电塔线体系地震反应的影响[J].振动与冲击,2013,32(8):79-87.TIAN L,LI H N,WANG W M.Effects of ground motion spatial variation on seismic response of a power transmission towerline system[J].Journal of Vibration and Shock,2013,32(8):79-87.
[10]田利,李宏男.多维多点地震动激励下折线型输电塔线体系反应分析[J].土木工程学报,2012,45(增刊1):131-135.TIAN L,LI H N.Seismic response of fold linear type transmission tower-line system under multi-component multisupport excitations[J].China Civil Engineering Journal,2012,45(Suppl.1):131-135.
[11]IRVINE H M.Cable structures[M].Cambridge:The MITPress,1981.
[12]OZONO S.In-plane dynamic interaction between a tower and conductors at lower frequencies[J].Engineering Structures,1991,14(4):210-216.
[13]YASUI H.Analytical study on wind-induced vibration of power transmission towers[J].Journal of Wind Engineering and Industrial Aerodynamics,1999,83(2):431-441.
[14]SUZUKI T.Seismic response characteristics of transmissions tower[C]∥10th WCEE.[S.l.]:Balkema Rotterdam,1922.
[15]骆文海.强震加速度波形积分时的基线修正[J].传感器技术,1991(3):23-26.LUO W H.Correction of datum line when integrating strongvibration acceleration wave-form[J].Journal of Transducer Technology,1991(3):23-26.