Structural-Acoustic Optimization of Composite Sandwich Structures: A Review

Denli, Huseyin; Sun, Jian‐Qiao

doi:10.1177/0583102406074086

Cited by 20 publications

(9 citation statements)

References 125 publications

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“…There have been several reported implementations and developments of the Rayleigh integral method [244][245][246][247][248][249][250][251][252][253][254], including vibro-acoustics [197,255,256]. Applications of the method include sandwich panels [257][258][259][260][261][262][263], engine or machine noise [203], electrostatic speaker [264] and transducers [52,265,266].…”

Section: The Rayleigh Integral Methodsmentioning

confidence: 99%

“…Expansions on the general method can be found in the following works and the references therein [183,267,[280][281][282][283]. Applications include the interaction of plates with fluids [23,245,284], sandwich panels/lightweight structures [257,[261][262][263]285], sound insulation [283], screens [286], the passenger compartment of an automobile [111], hydrophones [284,287] and in seismo-acoustics [288].…”

Section: Coupled Fluid-structure Interactionmentioning

confidence: 99%

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The Boundary Element Method in Acoustics: A Survey

Kirkup

2019

Applied Sciences

106

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The boundary element method (BEM) in the context of acoustics or Helmholtz problems is reviewed in this paper. The basis of the BEM is initially developed for Laplace’s equation. The boundary integral equation formulations for the standard interior and exterior acoustic problems are stated and the boundary element methods are derived through collocation. It is shown how interior modal analysis can be carried out via the boundary element method. Further extensions in the BEM in acoustics are also reviewed, including half-space problems and modelling the acoustic field surrounding thin screens. Current research in linking the boundary element method to other methods in order to solve coupled vibro-acoustic and aero-acoustic problems and methods for solving inverse problems via the BEM are surveyed. Applications of the BEM in each area of acoustics are referenced. The computational complexity of the problem is considered and methods for improving its general efficiency are reviewed. The significant maintenance issues of the standard exterior acoustic solution are considered, in particular the weighting parameter in combined formulations such as Burton and Miller’s equation. The commonality of the integral operators across formulations and hence the potential for development of a software library approach is emphasised.

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Section: The Rayleigh Integral Methodsmentioning

confidence: 99%

Section: Coupled Fluid-structure Interactionmentioning

confidence: 99%

The Boundary Element Method in Acoustics: A Survey

Kirkup

2019

Applied Sciences

106

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“…In addition, they studied the optimal boundary support conditions for improving the acoustic performance [31] and summarized previous research activities on sandwich composite panel modeling and optimization methods in Ref. [32].…”

Section: Introductionmentioning

confidence: 99%

Identification of Acoustic Characteristics of Honeycomb Sandwich Composite Panels Using Hybrid Analytical/Finite Element Method1

Kim

Han

2013

Journal of Vibration and Acoustics

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For the purpose of identifying the acoustic characteristics of honeycomb sandwich panels, finite element method (FEM), combined with boundary element method (BEM), has been widely used. However, the latter approach is not always applicable to high frequency analyses since it requires a large number of FEM/BEM meshes. In order to reduce computational resources and modeling times, a hybrid analytical/finite element method (HAFEM) is described that uses a finite element approximation in the thickness direction, while analytical solutions are assumed in the plane directions. Thus, it makes it possible to use a small number of finite elements, even for high frequency analyses. By using the HAFEM, the wave transmission, propagation, and radiation characteristics of the honeycomb sandwich panels are investigated. The proposed HAFEM procedure is validated by comparing the predicted transmission loss (TL) results to the measured ones. Through the use of the HAFEM model of a honeycomb sandwich panel, it is shown that the structural responses of the panel converge asymptotically to flexural waves in the low audible frequency region, core shear waves in the high audible to ultrasonic frequency region, and skin flexural waves in the high ultrasonic frequency region. Coincident frequencies occur at the transition region from the flexural to core shear wave behaviors. From the TL sensitivities of various panel design parameters, the most dominant design parameters contributing to the TL results are determined as a function of frequency. In order to improve the acoustic performance of the honeycomb sandwich panel while satisfying weight and strength requirements, a new double core honeycomb sandwich panel is designed to have the same mass per unit area as the baseline single core panel but have a larger equivalent flexural stiffness than that of the baseline panel.

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“…However, as mentioned above, structural-acoustic optimization of composite structures has received increasing attention with the extensive application of composite materials in recent years, and in terms of optimization of composite structures with respect to acoustic criteria, we may refer the reader to the review article (Denli and Sun, 2007) and the bibliography (Mackerle, 2003), and a large number of papers cited therein. As examples of various types of problems of optimum structural-acoustic design with composite materials, we may refer to (Hufenbach et al, 2001;Thamburaj and Sun, 2002;Chen et al, 2005;Yamamoto et al, 2008;Jensen, 2009).…”

Section: Introductionmentioning

confidence: 99%

Discrete material optimization of vibrating laminated composite plates for minimum sound radiation

Niu

Olhoff

Lund

et al. 2010

International Journal of Solids and Structures

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a b s t r a c tThis paper deals with vibro-acoustic optimization of laminated composite plates. The vibration of the laminated plate is excited by time-harmonic external mechanical loading with prescribed frequency and amplitude, and the design objective is to minimize the total sound power radiated from the surface of the laminated plate to the surrounding acoustic medium. Instead of solving the Helmholtz equation for evaluation of the sound power, advantage is taken of the fact that the surface of the laminated plate is flat, which implies that Rayleigh's integral approximation can be used to evaluate the sound power radiated from the surface of the plate. The novel Discrete Material Optimization (DMO) formulation has been applied to achieve the design optimization of fiber angles, stacking sequence and selection of material for laminated composite plates. Several numerical examples are presented in order to illustrate this approach.

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Structural-Acoustic Optimization of Composite Sandwich Structures: A Review

Cited by 20 publications

References 125 publications

The Boundary Element Method in Acoustics: A Survey

The Boundary Element Method in Acoustics: A Survey

Identification of Acoustic Characteristics of Honeycomb Sandwich Composite Panels Using Hybrid Analytical/Finite Element Method1

Discrete material optimization of vibrating laminated composite plates for minimum sound radiation

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