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Broad-Band Noise Mitigation in Vibrating Annular Plates by Dynamic Absorbers

Rezgar Shakeri

Center of Excellence in Railway Transportation, School of Railway Technology, Iran

Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran

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Davood Younesian

Center of Excellence in Railway Transportation, School of Railway Technology, Iran

Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran

E-mail Address: younesian@iust.ac.ir

Corresponding author.

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https://doi.org/10.1142/S0219455415500145Cited by:11 (Source: Crossref)

Abstract

Steady-state and transient acoustic radiation characteristics of clamped-free annular plate with tuned mass damper (TMD) device is studied. Galerkin’s procedure is employed to obtain the transverse vibration of the annular disk. Based on the Rayleigh integral approach, acoustic pressure radiation is obtained and subsequently the modal sound power and modal radiation efficiency are obtained. A new formulation for the transient acoustic pressure in Laplace domain is presented for the first time in this paper. Durbin’s numerical Laplace transform inversion scheme is employed to obtain the response spectrum. The optimum parameters of vibration absorbers are proposed for suppressing the dynamic vibration and acoustic pressure. A parametric study is carried out and the effects of vibration absorber characteristics are investigated using the analytical procedure. Limiting cases are considered and good agreements with the finite element solution, as well as with those available in the literature, are achieved.

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