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所属单位：机电学院

发表刊物：INTER-NOISE - Int. Congr. Expo. Noise Control Eng.: Impact Noise Control Eng.

摘要：Recent research has shown that the acoustic black hole (ABH) effect provides wave focalization and dissipation in thin-walled structures. The design and implementation of functionally graded acoustic black hole (FG-ABH) are presented in this work. Two kinds of the FG-ABHs are demonstrated, which are axially graded ABHs and the thickness graded ABHs, respectively. The FG-ABHs are capable to be manufactured by 3D printing tech using the Objet Connex 500 printer. The one-dimensional FG-ABH has both diminishing thickness and elastic modulus from the uniform part to the tip of the wedge. Wave propagation, attenuation and reflection in the presented FG-ABHs are investigated utilizing a viscoelastic University of Michigan’s Local Interaction Simulation Approach (UM/LISA). The damping effect of the materials is included based on Kelvin-Voigt viscoelasticity theory, in which the damping coefficients are obtained by both numerical and experimental model updating. Finally, the reflection coefficients of FG-ABHs are analyzed by UM/LISA and compared to that of the traditional ABH structure with homogeneous material. It indicates that the FG-ABHs enhance the ABH effects since they achieve lower reflection. © INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering. All rights reserved.

是否译文：否

发表时间：2018-01-01

合写作者：Zhang, Hui,Inman, Daniel J.,裘进浩,Cesnik, Carlos E.S.,季宏丽

通讯作者：黄巍