The vibration reduction characteristics of additional two-dimensional acoustic black holes
XING Qisen
XU Chuanyan
HUANG Xianli
LI Yongsheng
WANG Shuaijie
LIU Runda
LIU Yongli
Abstract：In order to study the vibration reduction and noise reduction of the additional two-dimensional acoustic black hole(2DABH),the two-dimensional frame and the engine standard block are used as research objects to simulate low-stiffness and high-stiffness structures respectively.The COMSOL simulation software is used to carry out modal analysis on the two-dimensional frame and the engine standard block.It is determined that the vibration energy of the frame structure and the engine standard block is mainly concentrated at each corner position of the structure.The vibration characteristics of the two frame and the engine standard block with high energy density after installing the additional 2DABH structure are analyzed by experiments in different frequency bands.The experimental results show that the amplitude decay rate corresponding to the vibration frequency of 80～2 048 Hz is 45.7%when the two-dimensional frame is installed with 2DABH;the amplitude decay rate corresponding to the vibration frequency of 300～8 192 Hz is 29.4%when the engine standard block is installed with 2DABH;the additional 2DABH has a good vibration reduction effect on both the two-dimensional frame and engine standard block,and the vibration reduction effect of the additional 2DABH in the high frequency band is significantly better than that in other frequency bands.
Keywords：2DABHattenuation ratevibration reduction and noise reductionenergy density
Publication Date：2024-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 33-39 )