Investigation of state vector computational solution on modeling of wave propagation through functionally graded nanocomposite doubly curved thick structures

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

doi:10.1007/s00366-019-00773-6

Cited by 31 publications

(18 citation statements)

References 61 publications

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“…Frequency analysis of GPLs-reinforced multi-layer nanocomposite beams lying on a viscoelastic foundation through HSDT was presented by Qaderi, et al [29] using Navier's solution technique. Ghassabi, et al [30] performed wave propagation modeling of doubly curved thick shells made of CNT-reinforced composite based on three-dimensional theory. Barati and Zenkour [31] investigated the dynamic oscillation of imperfect nanocomposite shells reinforced by graphene platelets using Galerkin's method.…”

Section: Introductionmentioning

confidence: 99%

Wave Dispersion Analysis of Fluid Conveying Nanocomposite Shell Reinforced by MWCNTs Considering the Effect of Waviness and Agglomeration Efficiency

et al. 2021

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The current paper is aimed to investigate the effects of waviness, random orientation, and agglomeration factor of nanoreinforcements on wave propagation in fluid-conveying multi-walled carbon nanotubes (MWCNTs)-reinforced nanocomposite cylindrical shell based on first-order shear deformable theory (FSDT). The effective mechanical properties of the nanocomposite cylindrical shell are estimated employing a combination of a novel form of Halpin-Tsai homogenization model and rule of mixture. Utilized fluid flow obeys Newtonian fluid law and it is axially symmetric and laminar flow and it is considered to be fully developed. The effect of flow velocity is explored by implementing Navier-Stokes equation. The kinetic relations of nanocomposite shell are calculated via FSDT. Moreover, the governing equations are derived using the Hamiltonian approach. Afterward, a method which solves problems analytically is applied to solve the obtained governing equations. Effects of a wide range of variants such as volume fraction of MWCNTs, radius to thickness ratio, flow velocity, waviness factor, random orientation factor, and agglomeration factor on the phase velocity and wave frequency of a fluid conveying MWCNTs-reinforced nanocomposite cylindrical shell were comparatively illustrated and the results were discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Wave Dispersion Analysis of Fluid Conveying Nanocomposite Shell Reinforced by MWCNTs Considering the Effect of Waviness and Agglomeration Efficiency

et al. 2021

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“…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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Investigation of state vector computational solution on modeling of wave propagation through functionally graded nanocomposite doubly curved thick structures

Cited by 31 publications

References 61 publications

Wave Dispersion Analysis of Fluid Conveying Nanocomposite Shell Reinforced by MWCNTs Considering the Effect of Waviness and Agglomeration Efficiency

Wave Dispersion Analysis of Fluid Conveying Nanocomposite Shell Reinforced by MWCNTs Considering the Effect of Waviness and Agglomeration Efficiency

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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