The Journal of the Acoustical Society of America

A review on optimization of composite structures Part I: Laminated composites

Engineering Noise Control

As a first endeavor, the free flexural vibration behavior of doubly curved complete and incomplete sandwich shells with functionally graded (FG) porous core, FG carbon nanotube reinforced composite (FG-CNTRC) face sheets and integrated piezoelectric layers is investigated. The variable radii shells with the three most common types of geometries, i.e., elliptical, cycloid and parabolic, are considered. The system equations are derived based on the general higher-order shear deformation theory and Maxwell's equation. The generalized differential quadrature (GDQ) method is employed to discretize the governing partial differential equations subjected to different boundary conditions. The accuracy and reliability of the approach are verified by comparing the results with the existing solutions in open literature. The effects of porosity parameter and porosity distribution through the thickness direction, carbon nanotube (CNT) volume fraction, different boundary conditions and various shell geometrical parameters on the flexural vibrational behavior of the smart sandwich shell structures are investigated and useful results are presented.

Vibrational behavior of doubly curved smart sandwich shells with FG-CNTRC face sheets and FG porous core

Multi objective optimization of sound transmission across laminated composite cylindrical shell lined with porous core investigating Non-dominated Sorting Genetic Algorithm

The effect of nature of porous material on diffuse field acoustic transmission of the sandwich aerospace composite doubly curved shell

Acoustic transmission through laminated composite cylindrical shell employing Third order Shear Deformation Theory in the presence of subsonic flow

This paper reviews the most of previous works through vibroacoustic performance of shell structures in past years (1957–2019). The major end is especially placed to collate the researches carried out in the area of power transmission through shell structures during the last 60 years. For this purpose, a series of categories are first highlighted in order to classify the issues that should be searched. The review is then directed with emphasis on the kinds of shells with different geometries containing cylindrical and doubly curved shells. Later on, not only a popular discussion is proposed to model the acoustic behavior of shells based on the different theories (classical, shear deformation and three-dimensional) but also a perfect explanation is provided wherein the importance of modeling the structures according to the different materials is revealed. To extend the review, various boundary conditions (finite and infinite) are also investigated. Besides, the further effects of external environments as fluid and thermal are inspected. Since the type of incident field can be impressive on the sound insulation specification of these shells, the structure is characterized based on the various acoustic excitations involving plane wave and point source incidences. Furthermore, some descriptions on the solution procedures (analytical, experimental and numerical) are also given. As a result, the review is centralized through other matters such as control and optimization techniques in order to improve the vibroacoustic behavior of shell structures.

M.R. Zarastvand

Papers

Multi objective optimization of sound transmission across laminated composite cylindrical shell lined with porous core investigating Non-dominated Sorting Genetic Algorithm

The effect of nature of porous material on diffuse field acoustic transmission of the sandwich aerospace composite doubly curved shell

Acoustic transmission through laminated composite cylindrical shell employing Third order Shear Deformation Theory in the presence of subsonic flow

Acoustic Insulation Characteristics of Shell Structures: A Review

Vibroacoustic behavior of orthotropic aerospace composite structure in the subsonic flow considering the Third order Shear Deformation Theory