Evaluation of Damping Effectiveness of Impact Dampers on ADSS Cable

摘要

All Dielectric Self-Supporting (ADSS) fiber optic cables have a tendency to experience severe vibration due to their low self-damping characteristics. To reduce these vibration levels and prevent damage to the ADSS cable and possible loss of critical optical signals, dampers are a required component of an effective aerial fiber optic system. One of the most common dampers for ADSS cables is the impact-type damper. This paper will discuss how the damper functions and laboratory and field measurement techniques to determine the effectiveness of this type of damper. The paper will also discuss limitations of this damper. The analysis technique used for laboratory evaluation of the impact damper includes damper energy dissipation measurements following the IEEE 664 Standard. These laboratory evaluations are then compared to results from field vibration studies conducted on similar size cables. For the field vibration studies, actual measurements are taken using specialized vibration recorders to determine how severe the vibration is in the field. These readings are taken both with and without dampers installed to provide a means for evaluating the effectiveness of the damper in reducing field vibration levels.