Renaissance of the Structural Intensity Analysis
* Presenting author
Structural intensity represents the flow of energy within a structure, subjected to external excitations. The interest in structural intensity comes from its practical applications such as damage detection, structure-borne noise control and structure optimization. By visualizing the flow of power, it is possible to identify the transmission paths and sources/sinks of mechanical energy within structure. It is a powerful tool for monitoring the structure behavior under different loading conditions which would result in altering energy flow path by using dissipative elements or mechanical modifications. We have extended the applications to not only structural mechanics, but also impact mechanics, fracture mechanics, rotating disk, thermal induced vibration as well as biomechanics. In recent years, Acoustic Black Hole (ABH) is developed for the flexural waves in the beam plate structures. It attracts lots of attentions in focusing wave energy and reducing vibration-acoustic level. It also enhances the efficient of the passive damping systems, reducing the weight of the damping layers. In this paper, we will first present an overview of the various applications of structural intensity as well as our more recent work on the use of structural intensity for guiding the design of ABH.