Vibration localization and reduction in plates via lightweight soft acoustic black hole and vibration absorbers

IF 3.8 2区 工程技术 Q1 ENGINEERING, MECHANICAL Acta Mechanica Sinica Pub Date : 2024-11-27 DOI:10.1007/s10409-024-24141-x
Jian Xue  (, ), Hong-Wei Ma  (, ), Li-Qun Chen  (, )
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引用次数: 0

Abstract

A lightweight composite resonator, consisting of a soft material acoustic black hole (SABH) and multiple vibration absorbers, is embedded in a plate to achieve localization and absorption of low-frequency vibration energy. The combination of local and global admissible functions for displacement enhances the accuracy of the Ritz method in predicting vibration localization characteristics within the SABH domain. Utilizing soft materials for the SABH can reduce the mass and frequency of the composite resonator. Due to the lack of orthogonality between global vibration modes and localized modes, the low-frequency localized modes induced by the SABH are used to shape the initial global modes, thereby concentrating the global vibration of the plate in the SABH region. Consequently, the absorbers of the composite resonator only need to be a small fraction of the mass of the local SABH to achieve substantial vibration control of the host plate. This vibration localization strategy can significantly reduce the vibration amplitude of the host plate and enhance the effectiveness of lightweight absorbers in vibration reduction.

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来源期刊
Acta Mechanica Sinica
Acta Mechanica Sinica 物理-工程:机械
CiteScore
5.60
自引率
20.00%
发文量
1807
审稿时长
4 months
期刊介绍: Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics
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