期刊
JOURNAL OF SOUND AND VIBRATION
卷 329, 期 22, 页码 4672-4688出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2010.05.019
关键词
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资金
- EPSRC [EP/F009232/1]
- EPSRC [EP/F009232/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F009232/1] Funding Source: researchfish
The reduction of flexural vibration in plate structures has been investigated using the recently reported acoustic black hole effect for flexural wave reflection in plates with the local thickness varying according to h(x) = epsilon x(m) and m >= 2. Since sharp edges of such plates (wedges) are always truncated before x=0, the real reflection coefficients are relatively high, therefore the application of a small amount of damping is required to achieve large reductions in vibration amplitude. This paper presents a numerical model of a plate incorporating an acoustic black hole wedge, with predictions for vibration amplitudes. These are compared to equivalent experimental measurements for a range of applied damping layers. It is concluded that the above-mentioned power-law wedges can be used as effective vibration dampers in plate structures over a wide frequency range of interest. (C) 2010 Elsevier Ltd. All rights reserved.
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