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• W2293570833 abstract "Large amplitude wind-induced vibrations of ice-accreted/unaccreted conductors in overhead transmission lines are frequently observed in the field. Damage due to the large vibrations is costly and affects many aspects of modern society. In this study, an attempt is made to identify the large amplitude gust responses and to distinguish them from the unstable phenomena of galloping in field-observed vibrations of long-span- overhead transmission lines that have bundled conductors. An extensive method of combining field-measured data analysis, eigenvalue analysis and gust response analysis is applied. The field-measured wind and vibration characteristics and their relations are first discussed to study preliminarily the types of field-measured responses. Next, the natural frequencies and mode shapes of the transmission lines are estimated by eigenvalue analysis using reliably created finite element models to verify the field-measured response characteristics in the frequency domain. Gust response analysis is finally conducted to interpret intensively the large-amplitude gust responses of overhead conductors, and results in good agreement with field-measured vibrations. For further interpretation, the time-domain gust-response analysis is conducted. A significant feature of this approach is that the time-dependent characteristics of the unsteady-aerodynamic forces and nonlinearities of both aerodynamic and structural origins can be taken into account.Through this extensive study, it is concluded that most of the field-measured responses are gust-type vibrations and that a gust response can be sufficiently large to cause damage in the overhead transmission lines, regardless of their type." @default.
• W2293570833 created "2016-06-24" @default.
• W2293570833 creator A5047382604 @default.
• W2293570833 date "2014-03-24" @default.
• W2293570833 modified "2023-09-27" @default.
• W2293570833 title "EXTENSIVE ANALYSES ON LARGE AMPLITUDE GUSTY-WIND- INDUCED VIBRATIONS OF OVERHEAD TRANSMISSION LINE SYSTEMS" @default.
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• W2293570833 hasPublicationYear "2014" @default.
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