Laboratory measurement of the power dissipation characteristics of aeolian vibration dampers

The two basic methodologies for the laboratory testing of aeolian vibration dampers described in IEEE Std 664-1993 are reviewed under the aspect of mechanical impedance relationships. The results of both methodologies-test of a vibration damper using a conductor span in resonant vibration and forced response test on a shaker-otherwise not comparable can then be set in relation to each other. Experimental results are presented to give evidence to that approach. Moreover, an experimental method is described for determining power flow on a laboratory conductor span. The vibration amplitude is measured at two arbitrary locations along the span. By digital signal processing it is possible to determine separately the amplitudes of the waves travelling forward and backward along the span. With both amplitudes known, the net power flow can be computed.