Investigation of power transmission across laminated composite doubly curved shell in the presence of external flow considering shear deformation shallow shell theory

Abstract

This study applies shear deformation shallow shell theory to inspect the acoustic behavior of laminated composite infinitely long doubly curved shallow shells subject to a radiating oblique plane sound wave. Herewith, a procedure is developed to investigate sound transmission loss through this shell, clarified as a ratio of incident power to transmitted power in the existence of mean flow. In a further step, displacements are developed as a linear combination of the thickness coordinate to designate an analytical solution based on shear deformation shallow shell theory. Consequently, an exact solution for sound transmission loss is brought forward by combining acoustic wave equations as a result of wave propagation through this shell with doubly curved shell equations of motion. Afterwards, the accuracy of the present formulation (shear deformation shallow shell theory) is determined by comparing the achieved results with those available in the literature and some assumptions associated with the geometric specifications of the plate are investigated. Finally, because of the remarkable achievement of the current formulation results in reduction of noise transmission into such structures, some effective parameters on sound transmission loss are used in numerical results, to solve this problem.

Multi-objective optimization approach on diffuse sound transmission through poroelastic composite sandwich structure

“…[56] based on doubly curved composite shell made of Glass/Epoxy without porous lining is taken into account with the same data as Talebitooti et al. [56], as shown in Figure 2. As it is obvious, a good agreement can be observed in low frequency domain.…”

“…Note that the sound insulation study of the doubly curved shells is a new approach which should be considered. Herewith, the authors have been presented power transmission of the doubly curved shells without porous core in two their previous publications [56,57]. Meanwhile, in this paper, a new approach is made through vibroacoustic optimization of the poroelastic composite sandwich structures in a diffuse field.…”

Investigating Hyperbolic Shear Deformation Theory on vibroacoustic behavior of the infinite Functionally Graded thick plate

“…At the beginning of this section, it is nominated to bring forward one major frequency, known as coincidence frequency, due to equating the speed of the forced bending wave with the speed of the free bending wave based on (Talebitooti et al, 2017b) as below:…”

Wave‐Based Method for Free Vibration Analysis of Orthotropic Cylindrical Shells with Arbitrary Boundary Conditions

“…Talebitooti and Zarastvand [30] investigated the wave propagation on infinite doubly curved laminated composite shell which is used in aerospace structures. Talebitooti et al [31] analyzed the acoustic behavior of laminated composite infinitely long doubly curved shallow shells which is the acoustic behavior of laminated composite infinitely long doubly curved shallow shells. Talebitooti et al [32] analyzed the acoustic behavior of the laminated composite cylindrical shell which is excited by an oblique plane sound wave by the third-order shear deformation theory.…”