Standardization of Conductor Vibration Measurements

The bending amplitude method is shown to be a practical and simple means for assessing overhead-conductor vibration in all conventional suspension clamps. It has been found that the bending amplitude, for all practical purposes, is linearly related to conductor vibration strain, the factor considered most closely related to fatigue, and that the relationship is essentially independent of vibration frequency, loop length, conductor tension, and vibration in adjacent spans. The method is recommended, therefore, as a standard for assessing overhead-conductor vibration. A specification for the method is provided along with procedures for analyzing test data and for inspecting conductors and associated hardware for the effects of vibration.