Experimental investigation of the acoustic black hole effect for flexural waves in tapered plates
By V. Krylov, R. Winward. 2007
277 citations recorded by the source corpus.
An efficient method of reducing edge reflections of flexural waves in plates or bars based on the 'acoustic black hole effect' has been recently proposed and described theoretically by one of the present authors (V.V.K). The method utilises a gradual change in thickness of a plate or bar, partly covered by thin damping layers, from the value corresponding to the thickness of the basic plate or bar (which is to be damped) to almost zero. The present paper describes the results of the experimental investigation of the damping system consisting of a steel plate of quadratic shape (wedge) covered on one side by a strip of absorbing layer. The results of the measurements of point mobility in such a system show that for a wedge covered by an absorbing layer there is a significant reduction of resonant peaks, in comparison with the uncovered wedge or with the covered plate of constant thickness. Thus, the measurements confirm the existence of the acoustic black hole effect for flexural waves and demonstrate the possibility of its use in practice.
Subfields: Biomedical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/7baf900222db49ca74d8763b5b1eff6a6d710e7a
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In Biomedical Engineering
In Mechanics of Materials
Citations in the corpus
- The acoustic black hole: A review of theory and applications (2020, background): “[11], consisting in a steel plate with a quadratic wedge covered by a strip of absorbing layer at one edge, leads to a significant reduction in mobility.”
- Damping of flexural vibrations in rectangular plates using the acoustic black hole effect (2010, background): “The matrix W contains the results of the boundary conditions, whose terms are, W [1] = 0, W [2] = 0, W [3] = 0, W [4] = 0, W [5] = 0, W [6] = 0, W [7] = 0, W [8] = 1, W [9] = 0, W [10] = 0, W [11] = 0, W [12] = 0 The matrix X contains the applied boundary conditions, a twelve by twelve in size.”