Vibroacoustic analysis of laminated composite panels stiffened by complex laminated composite stiffeners

Mejdi, Abderrazak; Atalla, Noureddine

doi:10.1016/j.ijmecsci.2012.02.003

Cited by 36 publications

(13 citation statements)

References 21 publications

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“…The light fluid assumption is also made as it implies omitting inter-modal coupling brought by the action of a fluid on the structure. Several authors have shown that these couplings are negligible at the first order [31], [68], [29] or do not change the general tendencies [69], [41], [54]. However, other authors have shown that some changes can occur in the case of heterogeneous boundary conditions, high…”

Section: Iiib Acoustic Radiation Of a Non-rectangular Ribbed Structurementioning

confidence: 99%

“…Indeed, nowadays simple structures like beams and isotropic plates are described well [24]- [33], but the design and modeling of ribbed B. Trévisan , K. Ege and B. Laulagnet 4 structures nonetheless remains a major topic of research. Most of these studies have focused on periodically ribbed isotropic flat plates [34]- [44], curved panels [45], stiffened cylindrical shells [46]- [53], and more recently laminated composite panels [54], [55] and sandwich structures [56]- [59].…”

Section: Introductionmentioning

confidence: 99%

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A modal approach to piano soundboard vibroacoustic behavior

Trévisan

Ege

Laulagnet

2017

The Journal of the Acoustical Society of America

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This paper presents an analytical method for modeling the vibro-acoustic behavior of ribbed non-rectangular orthotropic clamped plates. To do this, the non-rectangular plate is embedded in an extended rectangular simply supported plate on which a spring distribution is added, blocking the extended part of the surface, and allowing the description of any inner surface shapes. The acoustical radiation of the embedded plate is ensured using the radiation impedances of the extended rectangular simply supported plate. This method is applied to an upright piano soundboard: a non-rectangular orthotropic plate ribbed in both directions by several straight stiffeners. A modal decomposition is adopted on the basis of the rectangular extended simply supported plate modes, making it possible to calculate the modes of a piano soundboard in the frequency range [0;3000] Hz, showing the different associated mode families. Likewise, the acoustical radiation is calculated using the radiation impedances of a simply supported baffled plate, demonstrating the influence of the string coupling point positions on the acoustic radiated power. The paper ends with the introduction of indicators taking into account spatial and spectral variations of the excitation depending on the notes, which add to the accuracy of the study from the musical standpoint. A parametrical study, which includes several variations of soundboard design, highlights the complexity of rendering high-pitched notes homogeneous.

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Section: Iiib Acoustic Radiation Of a Non-rectangular Ribbed Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A modal approach to piano soundboard vibroacoustic behavior

Trévisan

Ege

Laulagnet

2017

The Journal of the Acoustical Society of America

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“…For cases when the dilatational motion of composite and sandwich layers' can be neglected, the estimation of the STL is well understood [1]. A theoretical approach accounting for an incompressible core and providing an estimate of the asymmetric propagating motion has been developed by Kurtze and Watters [2].…”

Section: Introductionmentioning

confidence: 99%

Wave spectral finite element model for the prediction of sound transmission loss and damping of sandwich panels

Mejdi¹,

Atalla

Ghinet

2015

Computers & Structures

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“…However, recently, the composite materials with varying stiffness has received greater interest, as they may lead to better and efficient design [2,3,4,5]. The stiffness of the composite material can be varied by: (a) using curvilinear fibres [2]; (b) varying the volume fraction or varying the fibre spacing [6]; (c) dropping or adding plies to the laminate [7] and (d) attaching discrete stiffeners to the laminates [8]. Among these concepts related to variable stiffness composite laminates (VSCL), the approach of curvilinear fibre does not introduce major geometry variations, it however does impose the constraint on the curvature of the fibre.…”

Section: Introductionmentioning

confidence: 99%

Assessment of certain higher-order structural models based on global approach for bending analysis of curvilinear composite laminates

Venkatachari¹,

Natarajan²,

Ramajeyathilagam³

et al. 2014

Composite Structures

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In this paper, the performance of different structural models based on global approach in evaluating the static response of curvilinear fibre composite laminates is analyzed. A C o shear flexible Quad-8 element developed based on higher-order structural theory is employed for the present study. The structural theory accounting for the realistic variation of displacements through the thickness and the possible discontinuity in the slope at the interface is considered. Four alternate discrete structural models, deduced from the generic structural model by retaining various terms in the displacement functions are examined for their applicability. The accuracy of the present formulation is demonstrated considering the problems for which analytical solutions are available. A systematic numerical study, assuming different ply-angle and lay-up, is conducted in bringing out the influence of various structural models on the static response of composite laminates with curvilinear fibres.

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Vibroacoustic analysis of laminated composite panels stiffened by complex laminated composite stiffeners

Cited by 36 publications

References 21 publications

A modal approach to piano soundboard vibroacoustic behavior

A modal approach to piano soundboard vibroacoustic behavior

Wave spectral finite element model for the prediction of sound transmission loss and damping of sandwich panels

Assessment of certain higher-order structural models based on global approach for bending analysis of curvilinear composite laminates

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