State vector computational technique for three-dimensional acoustic sound propagation through doubly curved thick structure

Ghassabi, M.; Talebitooti, Roohollah; Zarastvand, M.R.

doi:10.1016/j.cma.2019.04.011

Cited by 32 publications

(11 citation statements)

References 49 publications

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“…Therefore, it is very much important to identify the exact failure location and provide resistance to the propagation of failure. Laminated composite structures gained a large amount of attention among researchers because of their wide range of applications in vital research fields [1][2][3][4][5][6][7][8][9][10][11]. The mechanical and electric properties of these laminated composite structures can be further enhanced by attaching smart piezoelectric layers and combinedly they form a smart laminated composite structure.…”

Section: Introductionmentioning

confidence: 99%

Damage Propagation Prediction of Adhesion Failure in Composite T-joint Structure and Improvement using PZT Patch

Panda

Mishra

2021

Scientia Iranica

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In this paper, a three-dimensional finite element simulation model has been developed for the prediction, propagation and improvement of adhesion failure in an adhesively bonded laminated T-joint structure using the smart piezoelectric material. Initially, the three dimensional stresses (normal and shear) and failure locations in the composite T-joint (all the layers of the web and flange) are evaluated. At the identified failure location, virtual crack closure technique (VCCT) of fracture mechanics has been employed to compute the strain energy release rate (SERR) values for different pre-embedded adhesion failure lengths. The developed coupling analysis model is used to evaluate the SERR responses for the laminated composite T-joint with single/multiple piezoelectric layers. The efficacy and improved performance (resistance to adhesion failure) of the laminated smart T-joint structure has been analysed in details by considering different influencing parameters i.e. orientation schemes, material types, piezoelectric layers, thickness, number of layers of the laminate.

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Section: Introductionmentioning

confidence: 99%

Damage Propagation Prediction of Adhesion Failure in Composite T-joint Structure and Improvement using PZT Patch

Panda

Mishra

2021

Scientia Iranica

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“…In addition, in other works (Talebitooti et al, 2017; 2019), an optimization method based on the genetic algorithm (GA) was used to optimize the STL of the poroelastic structures. Ghassabi et al (2019a) achieved the acoustic response of a shell structure considering the three-dimensional (3D) theory. They also inspected the acoustic performance of the nanocomposite doubly curved shells (Ghassabi et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

Acoustic performance prediction of a multilayered finite cylinder equipped with porous foam media

Gohari

Zarastvand

Talebitooti

2020

Journal of Vibration and Control

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This paper presents an analytical model to embed porous materials in a finite cylindrical shell in order to obtain the sound transmission loss coefficient. Although the circumferential modes are considered only for calculating the amount of the transmitted noise through an infinitely long cylinder, the present study employs the longitudinal modes in addition to circumferential ones to analyze the vibroacoustic performance of a simply supported cylinder subjected to the porous core based on the first order shear deformation theory. To achieve this goal, the structure is immersed in a fluid and excited by an acoustic wave. In addition, the acoustic pressures and the displacements are developed in the form of double Fourier series. Since these series consist of infinite modes, it is essential to terminate this process by considering adequate modes. Hence, the convergence checking algorithm is employed in the form of some three-dimensional configurations with respect to length, frequency and radius. Afterwards, some figures are plotted to confirm the accuracy of the present formulation. In these configurations, the obtained sound transmission loss from the present study is compared with that of the infinite one. It is shown that by increasing the length of the structure, the results are approached to sound transmission loss of the infinite shells. Moreover, a new approach is proposed to show the transverse displacement of a finite poroelastic cylinder at different frequencies. Based on the outcomes, it is found that by enhancing the length of the poroelastic cylinder, the amount of the transmitted sound into the structure is reduced at the high frequency domain. However, the sound insulation property of the structure is improved at the low frequency region when the radius of the shell is decreased.

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“…Next, Talebitooti et al (2016, 2017a, 2017b, 2018a, 2018b, 2019a, 2019b, 2019c, and 2019d) also performed a large amount of research related to the STL of multilayer cylindrical shells and plates with different theories, including the first- and third-order shear deformation theory, nondominated sorting genetic algorithm, two-variable refined plate theory, shear deformation shallow shell theory, and hyperbolic shear deformation theory. And Ghassabi et al (2019a, 2019b) studied sound performance of doubly curved thick structure employing three-dimensional theory. In another work (Oliazadeh et al, 2019), a model based on statistical energy analysis was used to predict the STL of cylindrical shells or plates.…”

Section: Introductionmentioning

confidence: 99%

An improved approach for normal-incidence sound transmission loss measurement using a four-microphone impedance tube

Chen

et al. 2020

Journal of Vibration and Control

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The main aim of this study is to introduce an improved method for determining the sound properties of acoustic materials which is more precise than the common wavefield decomposition method and simpler than the common transfer matrix method. In the first part of the article, a group of formulae for calculating sound transmission loss is represented by combining the wavefield decomposition and transfer matrix methods. Subsequently, a formula for calculating sound absorption coefficients is derived from these formulae by definition. Furthermore, the present formulae are validated by comparing the experimental results achieved with the present formulae and those results obtained by other methods recorded in published articles. Eventually, it is demonstrated that the method can accurately measure the sound insulation performance of materials and the sound absorption properties of limp and lightweight materials.

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State vector computational technique for three-dimensional acoustic sound propagation through doubly curved thick structure

Cited by 32 publications

References 49 publications

Damage Propagation Prediction of Adhesion Failure in Composite T-joint Structure and Improvement using PZT Patch

Damage Propagation Prediction of Adhesion Failure in Composite T-joint Structure and Improvement using PZT Patch

Acoustic performance prediction of a multilayered finite cylinder equipped with porous foam media

An improved approach for normal-incidence sound transmission loss measurement using a four-microphone impedance tube

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