Quantitative Relationships in Conductor Vibration Damping [includes discussion]

Impedance matching relationships, based on electrical-mechanical analogies, are used to determine how the characteristics of vibration dampers should be related to the tension, weight per foot, and diameter of conductors on which the dampers are mounted, for optimum damping of aeolian vibration. Methods of determining power dissipated in vibrating conductors and dampers are developed. Data on such power dissipation and on power input from wind to vibrating conductors are combined to obtain estimates of vibration amplitude. The results of the estimates are checked by comparison of records of vibration of outdoor spans exposed to wind.