Sound transmission control through a hybrid smart double sandwich plate structure
01 Sep 2021-Journal of Sandwich Structures and Materials (SAGE PublicationsSage UK: London, England)-Vol. 23, Iss: 6, pp 2443-2483
TL;DR: In this article, a three-dimensional analytical model for control of sound transmission through an acoustically baffled simply supported hybrid smart double sandwich panel partition of rectangular plan is developed for sound transmission.
Abstract: A three-dimensional analytical model is developed for control of sound transmission through an acoustically baffled simply supported hybrid smart double sandwich panel partition of rectangular plan...
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TL;DR: In this article, the authors collected all of the existent papers in the field of acoustic transmission across multilayered plate constructions and proposed a comprehensive source consisting of approximately 410 papers.
Abstract: This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 ...
39 citations
Cites methods from "Sound transmission control through ..."
...[302] controlled the STL of a simply supported hybrid smart double-panel considering three-dimensional model....
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TL;DR: In this article , the authors examined the acousto-structural behavior of a sandwich cylindrical shell benefiting from hexagonal honeycomb structures in its core and functionally graded porous (FGP) layers on its outer and inner surfaces.
Abstract: To examine the acousto-structural behavior of a sandwich cylindrical shell benefiting from hexagonal honeycomb structures in its core and functionally graded porous (FGP) layers on its outer and inner surfaces, a comprehensive study based on an analytical model which also considers the effect of an external flow is conducted. A homogenous orthotropic model is used for the honeycomb core while its corresponding material features are found from the modified Gibson’s equation. The distribution pattern of FGP parts is either even or logarithmic-uneven, and a special rule-of-mixture relation governs their properties. Based on the first-order shear deformation theory (FSDT), Hamilton’s principle is exploited to derive the final coupled vibro-acoustic equations, which are then solved analytically to allow us to calculate the amount of sound transmission loss (STL) through the whole structure. This acoustic property is further investigated in the frequency domain by changing a set of parameters, i.e., Mach number, wave approach angle, structure’s radius, volume fraction, index of functionally graded material (FGM), and different honeycomb properties. Overall, good agreement is observed between the result of the present study and previous findings.
26 citations
TL;DR: In this paper , the authors extended the general usage of PZ materials by introducing acoustic and fluid loading effects in a way that an unfilled multilayer cylindrical nanoshell with a functionally graded (FG) material core and PZ layers is subjected to preliminary external electric load, acoustic waves and external flow motion.
Abstract: The multidisciplinary nature of piezoelectric (PZ) structures necessitates precise and efficient methods to express their behavior under different conditions. This article extends the general usage of PZ materials by introducing acoustic and fluid loading effects in a way that an unfilled multilayer cylindrical nanoshell with a functionally graded (FG) material core and PZ layers is subjected to preliminary external electric load, acoustic waves and external flow motion. As the properties of a functionally graded material changes along the shell thickness, a power law model is assumed to be governing such variations of desired characteristics. Evidently, this system includes different types of couplings and a comprehensive approach is required to describe the structural response. To this aim, the first-order shear deformation theory (FSDT) is used to define different displacement components. Next, the coupled size-dependent vibroacoustic equations are derived based on in conjunction with nonlocal strain gradient theory (NSGT) with the aid of Hamilton's variational principle and fluid/structure compatibility conditions. NSGT is complemented with hardening and softening material effects which can greatly enhance the precision of results. It is expected to use the findings of this paper in the optimization of similar systems by selecting suitable FG index, incident angle of sound waves, flow Mach number, nonlocal and strain gradient parameters, starting electric potential and geometric features. One of the important findings of this study is that increasing the electric voltage can obtain better sound insulation at small frequencies, specially prior to the ring frequency.
21 citations
TL;DR: In this paper, an improved multi-objective particle swarm optimization with genetic algorithm (MOPSOGA) was used to design a moderately thick hexagonal honeycomb sandwich plate.
19 citations
TL;DR: In this article , a slip boundary condition along with a Knudsen number is employed to address the vibration behavior of smart hybrid sandwich nanotubes acted upon by a moving sinusoidal load, while equations are derived with the aid of the Timoshenko beam model and nonlocal strain gradient theory.
Abstract: Abstract The idea of transferring vital drugs through nanotubes in the human body has attracted the attention of many researchers in the field of nanomedicine. Accordingly, the main objective of this article is to investigate the forced vibration response of two hybrid smart carbon nanotubes connected using springs and conveying a nanofluid, with each one including either a piezoelectric or electrorheological fluid layer. To this aim, a slip boundary condition along with a Knudsen number is employed to address the vibration behavior of smart hybrid sandwich nanotubes acted upon by a moving sinusoidal load, while equations are derived with the aid of the Timoshenko beam model and nonlocal strain gradient theory. The former theory is complemented with hardening and softening material effects which can greatly enhance the precision of the results. Furthermore, Hamilton’s principle is implemented to obtain the equations of motion. Regarding the time response of the structure, a combination of modal analysis and the Laplace transform is applied. The accuracy of the developed procedure is verified through a set of comparisons of static deflection (as a result of a point load) and vibration frequencies. In addition, the impact of a number of parameters ranging from nanoparticle velocity to material length scale is investigated.
14 citations
References
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3,350 citations
01 Jan 2010
TL;DR: In the last decades, contact mechanics and tribology have expanded to qualitatively new fields of applications, which are at the forefront of global development trends of technology and society, in particular microand nanotechnology as well as biology and medicine.
Abstract: Objectives In the last decades, contact mechanics and tribology have expanded to qualitatively new fields of applications, which are at the forefront of global development trends of technology and society, in particular microand nanotechnology as well as biology and medicine. At the same time, tribology developed experimental methods, theoretical concepts and numerical tools allowing effectively mastering the seemingly complicated physics and mechanics of interconnections. The goal of the workshop is to review the recently established concepts, tools and research activities and to outline the most important tasks for the future.
817 citations
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11 Feb 1987TL;DR: Wave in Fluids and Structures and Numerically Based Analyses of Fluid-Structure Interaction are presented, which show the importance of knowing the carrier and removal properties of wave energy.
Abstract: Chapter 1. Wave in Fluids and Structures Chapter 2. Structural Mobility, Impedance, Vibrational Energy and Power Chapter 3. Sound Radiation by Vibrating Structures Chapter 4. Fluid Loading of Vibrating Structures Chapter 5. Transmission of Sound Through Partitions Chapter 6. Acoustically Induced Vibration of Structures Chapter 7. Acoustic Coupling between Structures and Enclosed Volumes of Fluid Chapter 8. Introduction to Numerically Based Analyses of Fluid-Structure Interaction Chapter 9. Introduction to Active Control of Sound Radiation and Transmission
809 citations
"Sound transmission control through ..." refers background or methods in this paper
...Now, in order to determine the unknown acoustic modal coefficients Bmn; Cmn; ð Dmn; EmnÞ; one must simultaneously impose the continuity of the normal fluid/structure velocity components for both sandwich panels [1,2], i....
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...they vibrate like a single plate with the total mass of the two plates), the acoustic cavity modes are barely excited, and the transmission loss follows the so-called mass law [1,2]....
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...Lastly, the net acoustic forces acting on the top ERF-sandwich panel, and the bottom PZT-sandwich panel can, respectively, be expressed as a superposition of pertinent velocity potential functions in the form [1,2]...
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...occur when the path difference between the two intervening waves is a multiple of the one-quarter wavelength of the incident sound wave [1,2]....
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...partition, it can be calculated from [1,2]...
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401 citations