Experimental and Analytical Power Flow in Beams Using a Scanning Laser Doppler Vibrometer

Article type: Research Article

Authors: Blotter, Jonathan D. | West, Robert L.

Affiliations: Mechanical Engineering Dept., Virginia Tech, Blacksburg, VA 24061-0238

Abstract: An experimental spatial power-flow (ESPF) method is presented. This method provides a spatially continuous model of the power-flow vector field derived from experimental measurements. The power-flow vector field clearly indicates locations of energy sources and sinks as well as paths of energy transmission. In the ESPF approach, a scanning laser Doppler vibrometer acquires spatially dense measurements of the vibrating test structure. These measurements are used in solving for a spatially continuous 3-dimensional complex-valued model of the steady-state dynamic response. From this experimentally derived dynamics model, a spatial representation of the power flow is computed.

DOI: 10.3233/SAV-1996-3502

Journal: Shock and Vibration, vol. 3, no. 5, pp. 325-336, 1996