Damping properties of non-conductive composite materials for applications in power transmission pylons

Abstract

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Mitigation of conductor line galloping by a direct cable-connection to non-conductive composite power pylons

“…The damping properties of GFRP composite materials significantly decrease with decreasing temperature [11] and may not offer sufficient damping at galloping-prone temperatures below the freezing point. However, the application of constrained layer damping treatments, using viscoelastic materials with its peak damping in that temperature range, may considerably increase the damping of the composite structure [27].…”

“…Due to the viscoelastic nature of the polymer resin material, the damping behaviour is up to several magnitudes larger compared to traditional engineering materials such as metals [10]. The damping properties of various polymer resin materials and composite materials have thoroughly been investigated at environmental conditions typical for conductor line galloping [11,12]. The damping depends highly depends on the fibre direction of the laminate.…”