A quasi-3D layer-wise finite element model for vibroacoustic analysis of finite sandwich plates with frequency-dependent viscoelastic core

Abstract

This article presents a quasi-3D layer-wise finite element approach to investigate the vibroacoustic characteristics of finite constrained layer damping (CLD) plates with a viscoelastic material (VEM) core. The frequency-dependent properties of the VEM core are integrated into the kinematic governing equation. The sound transmission loss (STL) behavior under oblique plane sound wave excitation is studied in narrow frequency bands, thus the variation caused by resonance modes can be captured clearly. Results show that the STL values of the two CLD plates configurations are significantly increased in resonance frequency regions. The symmetric configuration is found to have better sound insulation performance.

Keywords:

• Viscoelastic material
• anelastic displacement fields model
• constrained layer damping
• finite element
• sound transmission loss

Author contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Bo Wang and Tongxu Dou. The first draft of the manuscript was written by Bo Wang and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Acknowledgments

The authors thank Dr. Ting Qu for assistance in early concept generation during the preparation of this manuscript. The authors thank the editors and the reviewers for their constructive comments.

Disclosure statement

The authors have no financial or proprietary interests in any material discussed in this article.

Data transparency

The datasets generated during the current study are available from the corresponding author on reasonable request.

Additional information

Funding

This work was not funded by any institution or individual.