Abstract
Acoustic black hole(ABH) structure design is a new bending wave control technology. ABH can restrain the bending wave inside the structure near the edge of the structure, thus forming a local high energy density area, which provides favorable conditions for energy recovery. A large number of studies have confirmed that one-dimensional ABH straight beam has excellent energy recovery potential, but only a few attention is paied in energy capture of various ABH curved beam structures which is widely used in aerospace field . In this paper, firstly, the vibration behaviour of a curved beam embedded in an acoustic black hole structure is analyzed and the local energy accumulation characteristics of the structure are verified. Then, a semi-analytical model of coupling between piezoelectric layer and girder structure is established and its validity is verified by numerical analysis. The influences of curvature, truncation thickness and load resistance on energy capture efficiency are discussed, which provides valuable reference for the design of energy recovery device based on ABH curved beam structure.
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