The use of locally resonant metamaterials to reduce flow-induced noise and vibration

FA Pires, L Sangiuliano, H Denayer, E Deckers… - Journal of Sound and …, 2022 - Elsevier
FA Pires, L Sangiuliano, H Denayer, E Deckers, W Desmet, C Claeys
Journal of Sound and Vibration, 2022Elsevier
Locally resonant metamaterials (LRMs) have recently emerged and shown potential in the
field of noise control engineering, given their superior noise and vibration reduction
performance in tunable frequency ranges, referred to as stop bands. This paper aims to
experimentally assess the potential of LRMs to suppress flow-induced noise and vibration of
coupled vibro-acoustic systems such as a cavity-backed plate. At first, the vibrations of a flat
plate under a turbulent flow excitation are measured and analyzed. Subsequently, different …
Abstract
Locally resonant metamaterials (LRMs) have recently emerged and shown potential in the field of noise control engineering, given their superior noise and vibration reduction performance in tunable frequency ranges, referred to as stop bands. This paper aims to experimentally assess the potential of LRMs to suppress flow-induced noise and vibration of coupled vibro-acoustic systems such as a cavity-backed plate. At first, the vibrations of a flat plate under a turbulent flow excitation are measured and analyzed. Subsequently, different LRM solutions are designed to tackle the vibrations of the plate. In a second stage, a hard-walled backing-cavity is coupled to the system and the noise radiation due to the vibrations of the plate into the backing cavity is evaluated. The plate is then treated with the designed LRM configurations. The results show that the designed LRM solutions are able to reduce the vibrations and noise radiation of the system due to a turbulent flow excitation.
Elsevier
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