摘要
声学黑洞(acoustic black hole,ABH)效应是利用薄壁结构几何参数或者材料特性参数的梯度变化,使波在结构中的传播速度逐渐减小,理想情况下波速减小至零从而不发生反射的现象.实现声学黑洞效应的主要方法是将薄板结构的厚度按照一定规律裁剪,利用声学黑洞可以将结构中传播的波动能量聚集在特定的位置.声学黑洞对波的聚集具有宽频高效、实现方法简单灵活等特点,在薄壁结构的减振降噪、能量回收等应用中具有明显的优势.本文介绍声学黑洞效应的基本原理、相关力学问题的研究进展和有待进一步探究的问题,包括声学黑洞结构的建模与分析方法、实验研究方法及进展、声学黑洞结构中波的传播与操控,以及声学黑洞在工程应用中的相关问题.
Acoustic black hole （ABH） effect utilizes the gradient variance of the structural configuration or material properties to diminish wave velocity in the structure. The wave velocity decreases to zero in an ideal scenario, resulting in zero reflection. The mainstream method to realize ABH effect is to tailor the structure thickness properly, such that energy is captured in a certain area. Great advantages and potential in applications for flexural wave manipulation in thin-walled structure result from its high efficiency, broadband characteristics and flexible implementation. We introduce basic principles of ABH effect, recent progress of related mechanical problems, and problems to be further explored. We describe the modeling and analysis method of ABH structure, the method and progress of experimental studies, manipulation and propagation of waves in ABH structures, and related issues in engineering applications of ABH structures.
作者
季宏丽
黄薇
裘进浩
成利
JI Hongli HUANG Wei QIU Jinhao CHENG Li(State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016, China Department of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong 999077, China)
出处
《力学进展》
EI
CSCD
北大核心
2017年第1期333-384,共52页
Advances in Mechanics
基金
国家自然科学基金(11532006
11372133
51375228)
六大人才高峰(JXQC-002)
中央高校基础研究基金(NE2015101
NE2015001
NP2016201)
香港政府大学教育资助委员会优配研究金计划(GRFprojectPolyU152009/15E)
机械结构力学及控制国家重点实验室自主课题(0515Y02)和开放课题(0516K02)
江苏高校优势学科建设工程资助项目
