Effect of Material and Geometry on the Sound and Vibration Transmission across a Sandwich Beam

Abstract

This paper studies sound and vibration transmission across a sandwich beam made of anisotropic materials. In our previous study, we have found that there is a significant increase in the transmission loss for the sandwich beam with anisotropic materials as compared with isotropic ones. This paper presents an extensive numerical study of the effects of damping, thickness of the laminae and density of the material on the sound transmission loss. This work may eventually lead to a new way of designing sandwich structures with high vibration and noise isolation performance.

Optimization of Anisotropic Sandwich Beams for Higher Sound Transmission Loss

“…It has been found in earlier studies that there is a signi"cant increase in the sound transmission loss for sandwich beams with anisotropic materials than those with isotropic ones [23,24]. The optimization studies presented in this work further validate this concept.…”

“…The optimization studies presented in this work further validate this concept. The present work is based on the model developed in references [23,24], where a highly e$cient set of computer programs has been developed that are suitable for optimization studies. In this paper, the material and geometric properties of the structure are treated as the design variables.…”

“…Appropriate constraints are imposed on the mass of the sandwich structure as well as on the other design parameters in order to maintain material and structural integrity. A brief overview of the model of the sandwich beam in references [23,24] is presented in section 2. Section 3 outlines the optimization issues dealt with in this work.…”

Reduction of the sound transmission of a periodic sandwich plate using the stop band concept

“…Abundant work concerning the mechanical properties, the dynamic model, and the vibration and sound properties of sandwich structures have been conducted [1][2][3][4][5][6][7][8][9][10].…”

Prediction of Modal Damping of FRP-Honeycomb Sandwich Panels with Arbitrary Geometries

“…To describe the sandwich shear deformation more accurately, higher order shear deformation theories have been developed (Liu and Zhao, 2007;Elmalichand Rabinovitch, 2012;Phan et al, 2013). Numerous factors influence sandwich damping, and these too have been the subject of some investigations (Maheri et al, 2008;Maheri and Adams, 1994;Thamburaj and Sun, 2001;Yaman and Onal, 2015).…”