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AN EXPERIMENTAL EVALUATION OF THE EFFECT OF AMPLITUDE REDUCTION ON THE FATIGUE LIFE OF OVERHEAD TRANSMISSION LINES SUBJECTED TO AEOLIAN VIBRATION

. (1976)

Abstract

This study is an effort to mechanically reproduce aeolian vibration in a laboratory environment, for the purpose of evaluating the effects of amplitude reduction on conductor fatigue life. A brief background of the aeolian vibration phenomenon is presented. Study parameters were developed using transmission line design criteria, service history, projected service requirements, and field motion measurements. Conductors were vibrated in the laboratory until a predetermined number of strand breaks occurred, with the ensuing vibration allowed to continue at a reduced amplitude. A description of the electro-mechanical systems utilized in the laboratory testing is presented. The experimental data are analyzed, and conclusions and reconnnendations are presented.

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