Work

Broadband low-frequency vibration isolation based on acoustic black holes metastructure using reduced multibody system transfer matrix method

Year: 2025

Type: article

Abstract: Acoustic black hole (ABH) has aroused increasing attentions due to its flexible broadband wave manipulation capability, but its low-frequency effect still needs to be improved. Besides, efficient dynamical calculation methods for complex ABH structures are still lacking. This article proposed a gradiently embedded ABHs-DVAs metastructure for low-frequency broadband vibration isolation based on combined broadband wave concentration of ABHs and flexible frequency tunings of dynamic vibration absorbers (DVAs). The Reduced Multibody System Transfer Matrix Method was applied with enhanced computation efficiency for metastructure modelling. Results show that the metastructure could combine the advantages of ABHs and DVAs, significantly reduce all low-frequency formants, and effectively improve the low-frequency broadband vibration isolation performance. The proposed method and vibration isolation effect were validated by finite element method and experimental results. This paper thus provides both an efficient computation method and a broadband low-frequency vibration isolation strategy for complex ABH isolation structures.

Source: Journal of low frequency noise, vibration and active control

DOI: 10.1177/14613484251345009

Authors: Junjie Chen, Yanni Zhang, Xiaoting Rui, Xiaojie Ma, Fufeng Yang

Institution: Nanjing University of Science and Technology

Language: English

Topic: Acoustic Wave Phenomena Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,500

Funder: Shuangchuang Program of Jiangsu Province