Structural Energy Flow in a Resiliently Coupled T-shaped Beam by Wave Intensity and Mobility Approaches

The aim of this work is to examine the limitations and possibilities of application for two different experimental techniques employed to measure the energy flow through a T-shaped beam containing a resilient junction. The methods considered are the structural wave intensity technique based on a finite-difference (FD) approximation and the Mobility Energy Flow (MEF) technique. Two resiliently coupled beams, forming a T-shape, are utilized for experimental evaluation of both methods. Reverberant and anechoically terminated ends of the receiving beam are used in order to examine conditions of weak and strong energy flow. Both measurement methods are compared with theoretical predictions of the input power in the source structure and the power transferred through the resilient material to the receiver structure. It was found that the MEF method demonstrates a number of advantages in contrast to the FD technique.