Spacer Damper Performance - A Function of In-Span Positioning

Work on widely different quad and triple conductor bundles has established a non-dimensional characteristic relating ratios of adjacent subspans to nodal positions for a fundamental mode of subconductor oscillation. A good correlation has also been shown between nodal positions relative to spacer dampers and their damping performance as measured by logarithmic decrements. The performance of a given spacer damper in a given mode was improved by a factor of four to five times by correct choice of spacings. Consequently, a method of comparative field testing for spacer dampers is indicated. The experimental results have been satisfactorily predicted by a theoretical approach.