﻿ 双分裂导线次档距振荡的气动力模型与解析

# 双分裂导线次档距振荡的气动力模型与解析Aerodynamic Model and Mathematic Expression of Twin-Conductors’ Subspan Oscillation

Abstract: Subspan oscillation is a unique phenomenon to split conductors, in which the flowing of upward conductor causes downward conductor’s vibration. The essence of the flowing around a conductor is the flowing around a cylinder. Karman vortex street will emerge downstream usually. With ahypothetical modal of Karman vortex street being set up in this paper, a mathematical expression of its quasi-steady drag and lift is founded on the base of the analysis of this modal. Then relative coefficient in aforementioned is amended according to the data acquired from wind tunnel testing. Thus a new idea is proposed to solve the question of the flowing around conductors.

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