Vibration of overhead transmission lines

STUDIES of vibration of overhead conductors have been prosecuted vigorously for several years in laboratory and fields. The importance of magnitude and distribution of stresses in multiplestrand conductors led to the development of a unique method for measuring stresses in vibrating conductors in the laboratory under conditions closely simulating field conditions, and numerous schemes for effecting better stress distribution at conductor supports have been investigated. These tests have been facilitated by the development of special Machinery. Field work has been conducted on special outdoor spans, and observations have been made also upon operating lines at widely separated locations.