Variable kinematic finite element models of multilayered composite plates coupled with acoustic fluid

Dozio, Lorenzo; Alimonti, Luca

doi:10.1080/15376494.2015.1121558

Cited by 19 publications

(3 citation statements)

References 43 publications

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“…Sarigül and Karagözlü [5] investigated the modal, structural-acoustic coupling properties of plates with different composite material parameters, studying the impact of material properties, layer angles, and the number of layers on the vibro-acoustic characteristics of a composite material plate-cavity coupling system and comparing them to isotropic plate-cavity coupling system. Dozio and Alimonti [6] proposed a novel and advanced finite element formulation for structural-acoustic problems and studied the coupling problem between rectangular composite-material plates and cavities. Sharma et al [7] studied the vibration and sound responses of hyperbolic laminated plate structures under harmonic point loads and established a structural response simulation model that considered different geometric shapes, such as cylinders, ellipsoids, spheres, and hyperboloids.…”

Section: Introductionmentioning

confidence: 99%

The Vibro-Acoustic Characteristics Analysis of the Coupled System between Composite Laminated Rotationally Stiffened Plate and Acoustic Cavities

Zhang,

Ding,

et al. 2024

Applied Sciences

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In order to study vibro-acoustic characteristics between composite laminated rotationally stiffened plate and acoustic cavities in the coupled system, first-order shear deformation theory (FSDT) and modified Fourier series are used to construct a unified analysis model. The involved coupled systems primarily encompass three types: the coupled system between composite laminated rotationally stiffened plate and cylindrical-cylindrical cavities, spherical-cylindrical cavities, and conical-cylindrical cavities. First, the first-order shear deformation theory and the modified Fourier series are applied to construct the allowable displacement function of the composite laminated rotationally stiffened plate and the allowable sound pressure function of the acoustic cavities. Second, the energy functionals for the structural domain and the acoustic field domain are established, respectively. According to the continuity condition of the particle vibration velocity at the coupling boundary between the composite, laminated cylindrical shell and the enclosed cavity, the coupling potential energy between the stiffened plate and two acoustic cavities is introduced to obtain the energy functional of the coupled system. Third, the Rayleigh-Ritz method is utilized to solve the energy functional and, when combined with artificial virtual spring technology, the suggested theory may be used to study the vibro-acoustic characteristics of a coupled system with arbitrary elastic boundary conditions. Finally, based on validating the fast convergence and correctness of the model, this paper will analyze the impact of crucial parameters on vibro-acoustic characteristics. Furthermore, by incorporating internal point forces and point-sound source stimulation, a steady-state response analysis of the coupled system will be conducted. This research can give a theoretical foundation for the vibration and noise reduction of a vibro-acoustic coupling system.

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Section: Introductionmentioning

confidence: 99%

The Vibro-Acoustic Characteristics Analysis of the Coupled System between Composite Laminated Rotationally Stiffened Plate and Acoustic Cavities

Zhang,

Ding,

et al. 2024

Applied Sciences

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“…25 analyzed the coupled sound field problem by the modal analysis method. Dozio and Alimonti 26 proposed a variable structure finite element analysis model to study the acoustic vibration characteristics of plate–cavity coupling system. Sarıgül and Karagözlü 27 studied the structural–acoustic system of a rectangular plate structure coupled with a rigid wall acoustic cavity.…”

Section: Introductionmentioning

confidence: 99%

Vibro-acoustic coupling characteristics of orthotropic L-shaped plate–cavity coupling system

Shi

Ren

Zhang

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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The research object of this paper is the L-shaped plate-cavity coupling system established by a cuboid acoustic cavity with rigid-wall or impedance-wall and L-shaped plate with numerous elastic boundary conditions in view of the Fourier series method. The main research content of this paper is the vibro-acoustic coupling characteristics. In this paper, the displacements admissible functions of the L-shaped plate are generally set as the sum of two cosines' product and two polynomials. Sound pressure admissible functions of the cuboid acoustic cavity can be considered as the sum of three cosines' product and six polynomials. The discontinuity of coupling system at all boundaries in the overall solution domain is overcome in this way. Through the energy principle and the Rayleigh-Ritz technology, it can be got that the solving matrix equation of the L-shaped plate-cavity coupling system. Based on verifying the great numerical characteristics of the L-shaped plate-cavity coupling model, they obtained both the frequency analysis and the displacement or sound pressure response analysis under the excitation, including a unit simple harmonic force or a unit monopole source. The advantages of this method are parameterization and versatility. In addition, some new achievements have been shown, based on various materials, boundary conditions, thicknesses, and orthotropic degrees, which may become the foundation for the future research.

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“…The mechanical analysis of laminated composite plates and shells is currently a recurring topic in the pertinent literature. In particular, the effect of the fiber orientation and the stacking sequence on the structural response has been hugely investigated in many papers to analyze the static [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ] and dynamic [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ] behavior of such structures.…”

Section: Introductionmentioning

confidence: 99%

Linear Static Behavior of Damaged Laminated Composite Plates and Shells

2017

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A mathematical scheme is proposed here to model a damaged mechanical configuration for laminated and sandwich structures. In particular, two kinds of functions defined in the reference domain of plates and shells are introduced to weaken their mechanical properties in terms of engineering constants: a two-dimensional Gaussian function and an ellipse shaped function. By varying the geometric parameters of these distributions, several damaged configurations are analyzed and investigated through a set of parametric studies. The effect of a progressive damage is studied in terms of displacement profiles and through-the-thickness variations of stress, strain, and displacement components. To this end, a posteriori recovery procedure based on the three-dimensional equilibrium equations for shell structures in orthogonal curvilinear coordinates is introduced. The theoretical framework for the two-dimensional shell model is based on a unified formulation able to study and compare several Higher-order Shear Deformation Theories (HSDTs), including Murakami’s function for the so-called zig-zag effect. Thus, various higher-order models are used and compared also to investigate the differences which can arise from the choice of the order of the kinematic expansion. Their ability to deal with several damaged configurations is analyzed as well. The paper can be placed also in the field of numerical analysis, since the solution to the static problem at issue is achieved by means of the Generalized Differential Quadrature (GDQ) method, whose accuracy and stability are proven by a set of convergence analyses and by the comparison with the results obtained through a commercial finite element software.

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Variable kinematic finite element models of multilayered composite plates coupled with acoustic fluid

Cited by 19 publications

References 43 publications

The Vibro-Acoustic Characteristics Analysis of the Coupled System between Composite Laminated Rotationally Stiffened Plate and Acoustic Cavities

The Vibro-Acoustic Characteristics Analysis of the Coupled System between Composite Laminated Rotationally Stiffened Plate and Acoustic Cavities

Vibro-acoustic coupling characteristics of orthotropic L-shaped plate–cavity coupling system

Linear Static Behavior of Damaged Laminated Composite Plates and Shells

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