Inertially Coupled Galloping of Iced Conductors

[+] Author and Article Information
P. Yu, A. H. Shah, N. Popplewell

Faculty of Engineering, The University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada

J. Appl. Mech 59(1), 140-145 (Mar 01, 1992) (6 pages) doi:10.1115/1.2899419 History: Received June 04, 1990; Revised January 18, 1991; Online March 31, 2008


This paper is concerned with the galloping of iced conductors modeled as a two-degrees-of-freedom system. It is assumed that a realistic cross-section of a conductor has eccentricity; that is, its center of mass and elastic axis do not coincide. Bifurcation theory leads to explicit asymptotic solutions not only for the periodic solutions but also for the nonresonant, quasi-periodic motions. Critical boundaries, where bifurcations occur, are described explicitly for the first time. It is shown that an interesting mixed-mode phenomenon, which cannot happen in cocentric cases, may exist even for nonresonance.

Copyright © 1992 by The American Society of Mechanical Engineers
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