覆冰四分裂导线舞动数值模拟研究

严波;李文蕴;周松;张宏雁

振动与冲击 ›› 2010, Vol. 29 ›› Issue (9) : 102-107.

PDF(1802 KB)
PDF(1802 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (9) : 102-107.
论文

覆冰四分裂导线舞动数值模拟研究

  • 严波1;李文蕴1;周松2;张宏雁3
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Numerical Simulation Study on Galloping of Iced Quad Bundle Conductor

  • Yan Bo1;Li Wen-yun1;Zhou Song2;Zhang Hong-yan3
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摘要

用Hamilton变分原理建立动力学平衡方程,利用罚函数法引入各子导线上间隔棒连接点之间的运动约束条件,获得覆冰四分裂导线动力方程。方程采用Newmark法进行时间积分,Newton-Raphson迭代法求解。通过数值算例验证方法的正确性。利用由风洞试验获得的覆冰四分裂导线空气动力系数,通过数值模拟获得初始攻角、风速和档距等对覆冰四分裂导线舞动的影响规律。结果表明,考虑作用于各子导线上空气动力载荷的不同对舞动幅值有明显影响;初始攻角的大小是诱发舞动的关键因素;舞动幅值随风速和档距的增大而增大。

Abstract

The dynamic system equation of iced quad bundle conductor is deduced out by means of the Hamilton variational principle. The constraint conditions of the clamp points of the sub-conductors connected by a spacer are introduced by the penalty function. The Newmark method is used in the time integration and the Newton-Raphson iteration is applied to solve the nonlinear equation. The presented method is justified by means of a numerical example. The effects of attack angle, wind speed and span length on the galloping of quad bundle conductor are numerically investigated based on the aerodynamic coefficients determined by wind tunnel experiments. It is demonstrated that the galloping amplitude is different if the difference of aerodynamic load on each sub-conductor is taken into account; the attack angle is a key factor for the occurrence of galloping phenomenon and the galloping amplitude increases with the wind speed and span length.

关键词

四分裂导线 / 覆冰 / 舞动 / 罚函数法 / 数值模拟

Key words

Quad bundle conductor / ice / galloping / penalty function method / numerical simulation

引用本文

导出引用
严波;李文蕴;周松;张宏雁. 覆冰四分裂导线舞动数值模拟研究[J]. 振动与冲击, 2010, 29(9): 102-107
Yan Bo;Li Wen-yun;Zhou Song;Zhang Hong-yan. Numerical Simulation Study on Galloping of Iced Quad Bundle Conductor[J]. Journal of Vibration and Shock, 2010, 29(9): 102-107

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