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Mathematical Problems in Engineering
Volume 2015, Article ID 671632, 10 pages
http://dx.doi.org/10.1155/2015/671632
Research Article

Control of Wind-Induced Vibration of Transmission Tower-Line System by Using a Spring Pendulum

Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China

Received 23 October 2014; Revised 12 February 2015; Accepted 12 February 2015

Academic Editor: Massimo Scalia

Copyright © 2015 Peng Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The high-voltage power transmission tower-line system, which is a high flexible structure, is very susceptible to the wind-induced vibrations. This paper proposes the utilization of the internal resonance feature of the spring pendulum to reduce the wind-induced vibration of a transmission tower. The kinetic expression of the spring pendulum system is obtained through Lagrangian equation. The condition of the internal resonance is verified to be λ = 2, in which λ is the ratio of the spring mode frequency over the pendulum mode frequency. A 55 m tower in the Liaoning province is established in SAP2000 to numerically verify the effectiveness of the proposed device. The spring pendulum is modeled using Link element. The wind speed history is generated based on Kaimal spectrum using harmonic superposition method. Results show that, (1) compared with the suspended mass pendulum, the spring pendulum absorbs more energy and reduces the oscillation more effectively and (2) the vibration control performance of the proposed spring pendulum improves as the external wind load increases.