A normalized wave number variation parameter for acoustic black hole design

被引：67

作者：

Feurtado, Philip A. ^{[1
]}

Conlon, Stephen C. ^{[1
]}

Semperlotti, Fabio ^{[2
]}

机构：

[1] Penn State Univ, Appl Res Lab, University Pk, PA 16802 USA

[2] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2014年 / 136卷 / 02期

关键词：

FLEXURAL VIBRATIONS; PLATES;

D O I：

10.1121/1.4890205

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

In recent years, the concept of the Acoustic Black Hole has been developed as an efficient passive, lightweight absorber of bending waves in plates and beams. Theory predicts greater absorption for a higher thickness taper power. However, a higher taper power also increases the violation of an underlying theory smoothness assumption. This paper explores the effects of high taper power on the reflection coefficient and spatial change in wave number and discusses the normalized wave number variation as a spatial design parameter for performance, assessment, and optimization. (C) 2014 Acoustical Society of America

引用

页码：EL148 / EL152

页数：5

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