Vibro-acoustic response of an elliptical plate-cavity coupled system to external shock loads

Hasheminejad, Seyyed M.; Shakeri, Rezgar; Rezaei, Shahed

doi:10.1016/j.apacoust.2012.02.009

Cited by 17 publications

(8 citation statements)

References 41 publications

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“…where, N is the truncation constant and T 0 σ is assumed to have a value between 5 and 10 for sufficient accuracy [20].…”

Section: Forced Vibration Analysismentioning

confidence: 99%

“…Chen et al [18] used the finite element method and carried out a sensitivity analysis to determine the sound pressure level inside a structural-acoustic system. Different authors have also studied the forced vibration of circular plate-cavity systems subjected to different types of excitation [19][20][21]. In most of the previous studies, for investigating the forced vibrations of the plate-cavity systems, harmonic excitations have been employed and response of the models has been obtained for a limited number of frequencies.…”

Section: Introductionmentioning

confidence: 99%

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Vibro-acoustic analysis of a coach platform under random excitation

Sadri

Younesian

2015

Thin-Walled Structures

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“…where, N is the truncation constant and T 0 σ is assumed to have a value between 5 and 10 for sufficient accuracy [20].…”

Section: Forced Vibration Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibro-acoustic analysis of a coach platform under random excitation

Sadri

Younesian

2015

Thin-Walled Structures

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“…(15), and direct substitution of results into Eq. (11), after taking the Laplace transform with respect to time (assuming zero initial conditions), yields the final equation of motion for forced vibrations of the piezo-coupled circular plate in the form (16) where…”

Section: Structural Modelmentioning

confidence: 99%

“…At this point, by decomposition of the actuator voltage in the form Φ a (r, θ, s) = η a (s)ϕ a (r, θ), and direct substitution of Eq. 17into the equation of motion (16), while noting that the normal modes, W nm (r, θ) must satisfy the free vibration eigen-relation…”

Section: Final Governing Equationsmentioning

confidence: 99%

Active Transient Acousto-Structural Response Control of a Smart Cavity-Coupled Circular Plate System

Hasheminejad

Shakeri

2017

Archives of Acoustics

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The transient vibroacoustic response suppression of a piezo-coupled sandwich circular plate backed by a rigid-walled cylindrical acoustic enclosure is investigated. Problem formulation is based on the linear acoustic wave theory, Kirchhoff thin plate model, fluid/structure compatibility relations, Rayleigh integra formula, and active damping control (ADC) strategy. Matlab’s Genetic Algorithm (GA) is utilized to identify and optimize the feedback controller gain parameter based on a multi-objective performance index function. Durbin’s numerical Laplace inversion scheme is then used to calculate the key acousto-structural response parameters due to a transverse impulsive shock force for selected cavity depths. Numerical simulations demonstrate satisfactory performance of adopted control methodology in effective suppression of panel displacement response and radiated external sound pressure for enclosures of shallow and moderate depths. Limiting cases are considered and accuracy of the proposed model is rigorously verified.

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“…, where = √ −1 and is an arbitrary real number greater than all the real parts of the singularities of Λ( ) and Λ( ) can be ( , ) or ( , , ) in the interval [0, 2 0 ], shall be adopted. Accordingly, one could readily employ expansion [25]…”

Section: Formulationmentioning

confidence: 99%

Analytical Solution for the Sound Radiation Field of a Viscoelastically Supported Beam Traversed by a Moving Load

Shakeri

Younesian

2014

Shock and Vibration

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Sound radiation from a beam resting on a viscoelastic foundation is analytically studied when it is subjected to a moving load. The topic could cover a range of applications such as submerged floating tunnels, buried pipelines, and railway tracks. Galerkin’s method is employed to obtain the transverse vibration of the beam. Based on the Rayleigh integral approach, acoustic pressure distribution around the beam is obtained in the time domain. In the second part of this paper, corresponding displacement and acoustic pressure are obtained by the use of the Rayleigh-Ritz approach in conjunction with the Laplace transform method and by the use of the Fourier transform, respectively. Durbin’s numerical Laplace transform inversion scheme is eventually employed to obtain dynamic responses. A parametric study is then carried out and influences of the design parameters as well as the loading conditions on the acoustic pressure field are investigated.

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Vibro-acoustic response of an elliptical plate-cavity coupled system to external shock loads

Cited by 17 publications

References 41 publications

Vibro-acoustic analysis of a coach platform under random excitation

Vibro-acoustic analysis of a coach platform under random excitation

Active Transient Acousto-Structural Response Control of a Smart Cavity-Coupled Circular Plate System

Analytical Solution for the Sound Radiation Field of a Viscoelastically Supported Beam Traversed by a Moving Load

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