Influence of support properties on the sound radiated from the vibrations of rectangular plates

Park, J.; Mongeau, Luc; Siegmund, Thomas

doi:10.1016/s0022-460x(02)01215-4

Cited by 45 publications

(28 citation statements)

References 6 publications

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“…A modal damping of 1% has been considered throughout the analysis. Table 2: Material properties of Carbon/epoxy composite (Park et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

“…The frequencies and the corresponding vibrational mode shapes of the plate are computed using the FEM. The effect of support conditions on the velocity and acoustic response of vibrating rectangular isotropic baffled plates has also been studied using Rayleigh integral formulation (Park et al, 2003;Qiao and Huang, 2007). The support tuning is observed to yield significant noise and vibration reduction.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Vibro-Acoustic Responses of Un-Baffled Multi-Layered Composite Structure under Various End Conditions and Experimental Validation

Sharma

Mahapatra

Panda

2017

Lat. Am. j. solids struct.

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This article presents the vibro-acoustic modeling and analysis of un-baffled laminated composite flat panels subjected to harmonic point load under various support conditions. The frequency values of the panel are obtained by using simulation model through the commercial finite element package (ANSYS) via batch input technique. Initially, the rate of convergence of the current simulation results is established by solving different examples under various edge supports. Further, the natural frequencies and corresponding modes are computed and compared with available published and experimentally obtained values. Then, the modal values are exported to LMS Virtual.Lab environment for the computation of acoustic responses of the vibrating laminated plate structure. Further, an indirect boundary element approach has been adopted to extract the coupled vibro-acoustic responses. Subsequently, the radiated sound power of the structure and the sound pressure level within the acoustic medium are computed using the present scheme and compared with the published numerical results and in-house experimental data, respectively. Finally, a comprehensive study has been performed to highlight the effect of different structural parameters (thickness ratio, aspect ratio, modular ratio and lay-up scheme), support conditions and the composite properties on the acoustic radiation responses of the laminated plate structure.

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“…A modal damping of 1% has been considered throughout the analysis. Table 2: Material properties of Carbon/epoxy composite (Park et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Study of Vibro-Acoustic Responses of Un-Baffled Multi-Layered Composite Structure under Various End Conditions and Experimental Validation

Sharma

Mahapatra

Panda

2017

Lat. Am. j. solids struct.

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“…Then, if a damping and/or a stiffness of plate edge is considered, the vibro-acoustic responses amplitude can be much reduced. For this purpose, Park et al [2003] examined the effect of viscoelastic supports at the level of plate's edges. It has been shown that the plate's velocity and the sound energy are effectively affected by the damping on the level of the edges inducing reduced vibration amplitudes.…”

Section: Ali Akrout Mariem Miladi Chaabane Lotfi Hammami and Mohamementioning

confidence: 99%

Edge stiffness effects on thin-film laminated double glazing system dynamical behavior by the operational modal analysis

Akrout¹,

Chaabane²,

Hammami³

et al. 2012

J. Mech. Mater. Struct.

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We apply operational modal analysis (OMA) to determine the eigenfrequencies and the eigenmode shapes of a thin-film laminated double glazing system. For this purpose, the dynamic behaviors of both a laminate alone and a coupled system (double-wall structure) for specific boundary conditions are investigated. Here, the laminated plate which is composed of two elastic skins joined with an adhesive ultra-thin film is bonded by an elastic joint. Thus, two configurations of the thin-film laminated glass plate elastic boundary conditions are considered. The first one assumes that the structure is bonded by a translational stiffness (linear springs). In the second one, besides the translational stiffness, a rotational stiffness (angular springs) is introduced in order to improve the developed model. The modal recombination results of a thin-film laminated glass plate as well as those of the thin-film laminated double glazing system are presented and compared to the estimated modes achieved by OMA. Since a good agreement is obtained, the OMA technique can be used to determine the modal parameters by considering the experimental vibratory responses of the studied system. In addition, the vibration's amplitude of two laminated glass plates linked from edge to edge with both linear and angular springs can be much reduced compared to the one of the same structure bonded only by linear springs.

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“…[1][2][3][4] These investigations have indicated that boundary supports significantly affect the sound insulation properties of plates, especially in the low frequency domain. More recently, several simulation methods [5][6][7] have been developed that allow for efficiently computing the vibroacoustic response of plates with arbitrary elastic boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

“…7 For this purpose, a baffled plate system was designed and the following validation procedure was performed: (1) identifying the actual boundary condition of the plate system using the BCI method, (2) predicting the STL value using the prediction model 7 based on the identified boundary condition, (3) measuring the STL data of the plate system, and (4) comparing the measured STL with the predicted results obtained in (2).…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of the sound transmission of rectangular baffled plates with general elastic boundary conditions

Mak

2011

The Journal of the Acoustical Society of America

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Several prediction methods have recently been developed for systematically studying the effects of general boundary conditions on the sound transmission loss (STL) of plate-like structures. But corresponding experimental validation studies remain scarce owing to the difficulty of obtaining accurate boundary conditions for practical structures. This paper presents a convincing experiment conducted on a baffled plate system to validate the STL prediction model in a previous paper by Yu et al. [Noise Control Eng. J. 58(2), 187–200, 2010]. A method is proposed to determine the boundary conditions of this system, and experimental STL compares well with the predictions based on the identified boundary condition.

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Influence of support properties on the sound radiated from the vibrations of rectangular plates

Cited by 45 publications

References 6 publications

Numerical Study of Vibro-Acoustic Responses of Un-Baffled Multi-Layered Composite Structure under Various End Conditions and Experimental Validation

Numerical Study of Vibro-Acoustic Responses of Un-Baffled Multi-Layered Composite Structure under Various End Conditions and Experimental Validation

Edge stiffness effects on thin-film laminated double glazing system dynamical behavior by the operational modal analysis

Experimental validation of the sound transmission of rectangular baffled plates with general elastic boundary conditions

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