Grouped inerter-resonator arrays for broadband reduction of plate mobility and radiated sound power using modal receptance synthesis
Abstract
A plate-type vibroacoustic treatment is developed in which a simply supported Kirchhoff plate is coupled to a grouped array of parallel spring-damper-mass-inerter attachments. The emphasis is intentionally computational. The plate equation is reduced to a modal receptance form using 36 orthogonal sine modes, and the local attachments are eliminated analytically so that each attachment contributes a rank-one dynamic stiffness term. The resulting frequency-domain matrix remains explicit and can therefore be evaluated over large parameter grids without rederiving the governing equations. For the present plate, the bending rigidity is , the areal density is , the planform area is , and the total plate mass is . The sixteen attachments are arranged on a grid and grouped columnwise at target frequencies, which are Hz. With the reference internal mass , inertance ratio , tuning scale 0.9, spread coefficient 0.18, and damping ratio , the grouped inerter-resonator array yields average reductions of dB in point mobility and dB in both mean-square velocity and radiated sound-power proxy over 80–600 Hz. The spring-mass reference under identical internal mass produces corresponding lower averages of and dB. As per this study, the peak-by-peak reductions exceed 20 dB at several dominant modal peaks, while tuning scatter of 5% root-mean-square leaves the average velocity reduction essentially unchanged.
Copyright (c) 2026 Yogeesh Nijalingappa, Mustafa Abdullah, Asokan Vasudevan, Shankaralingappa Bheemasandra Marulappa, Suleiman Ibrahim Mohammad, Ashalatha Kodihalli Siddagangaiah

This work is licensed under a Creative Commons Attribution 4.0 International License.
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