Modal characteristics of two operating power transmission poles

Issue title: International Conference on Structural Engineering Dynamics – ICEDyn 2009

Article type: Research Article

Authors: Chen, Shen-En | Dai, Kaoshan

Affiliations: Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, NC 28223 - 0001, USA

Note: [] Corresponding author. E-mail: [email protected]

Abstract: Unique conductor-pole couplings complicate the dynamic behaviors of electric transmission pole line systems. Finite element modeling is performed on two typical transmission poles used in southeastern USA – a steel pole and a prestressed concrete pole. The two poles are representative of unique structure types: a heavy rod-like structure and a lightweight, shell-type structure. Since coupling issues between the pole and the cable introduce great complexities for modeling the pole line system, simplified numerical models are used. Limited full-scale modal test results are presented to verify the numerical models. The prestressed concrete pole is shown to be easier for mode identification than the steel pole – but both numerical models show complicated coupled vibration modes. This study is part of a larger study to establish an understanding of the dynamic response analyses of power grid under ground vibrations.

Keywords: Finite element modeling, prestressed concrete poles, vibration characteristics

DOI: 10.3233/SAV-2010-0547

Journal: Shock and Vibration, vol. 17, no. 4-5, pp. 551-561, 2010