行波效应对大跨越输电塔-线体系纵向地震响应影响

魏奇科;李正良

振动与冲击 ›› 2011, Vol. 30 ›› Issue (10) : 236-240.

PDF(2039 KB)
PDF(2039 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (10) : 236-240.
论文

行波效应对大跨越输电塔-线体系纵向地震响应影响

  • 魏奇科; 李正良
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Traveling wave effect on longitudinal seismic response of the long-span power transmission tower-cable system

  • WEI Qi-ke; LI Zheng-liang
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摘要

由于特高压大跨越输电塔-线体系塔身高跨度大,仅考虑单塔及塔-线体系的一致地震输入是远远不够的。本文考虑地震波沿大跨越线路传播时引起的地震行波效应,建立了特高压大跨越输电塔-线体系精细的三维空间有限元模型,运用几何非线性动力时程分析方法研究了纵向地震作用下大跨越输电塔-线体系的地震响应特性,并和一致地震动输入下的反应进行了对比。结果表明:行波效应既可以增加又可以减小塔身的地震响应,主要与地震动作用于大跨越两端输电塔的相位差有关;行波效应对导线跨中竖向位移响应影响十分明显,但对导线内力响应影响很小

Abstract

Because of the high tower and long-span of the ultra-high voltage long-span transmission tower-cable system that is not enough only considering seismic responses of the system under the uniform excitation. Based on the established precise 3D finite element model of the ultra-high voltage long-span transmission tower-cable system, the longitudinal seismic responses characteristics of the system are researched under traveling wave excitation and compared with those under uniform excitation, through the geometric nonlinearity dynamic time history integration method. The results show that the traveling wave excitation can increase, or decrease the seismic responses of the transmission tower, which are mainly related to the phase difference; the effect of the traveling wave on the line’s displacement responses is obviously in the vertical direction, but is not significant on the line’s axial force.

关键词

行波效应 / 相位差 / 输电塔-线体系 / 几何非线性 / 时程分析 / 一致输入 / 地震响应

Key words

traveling wave effect / phase difference / power transmission tower-cable system / geometric nonlinearity / time history analysis / uniform excitation / seismic response

引用本文

导出引用
魏奇科;李正良. 行波效应对大跨越输电塔-线体系纵向地震响应影响[J]. 振动与冲击, 2011, 30(10): 236-240
WEI Qi-ke; LI Zheng-liang. Traveling wave effect on longitudinal seismic response of the long-span power transmission tower-cable system[J]. Journal of Vibration and Shock, 2011, 30(10): 236-240

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