Issue |
Acta Acust.
Volume 8, 2024
Topical Issue - Vibroacoustics
|
|
---|---|---|
Article Number | 52 | |
Number of page(s) | 15 | |
DOI | https://doi.org/10.1051/aacus/2024043 | |
Published online | 18 October 2024 |
Scientific Article
Higher-order modal parameter estimation and verification of cross-laminated timber plates for structural-acoustic analyses
Swiss Federal Laboratories for Materials Science and Technology (Empa), Überlandstrasse 129, 8600 Dübendorf, Switzerland
* Corresponding author: sven.vallely@empa.ch
Received:
8
April
2024
Accepted:
24
July
2024
Cross-Laminated Timber (CLT) is a wood composite that is popular due to its favourable stiffness-to-mass-density ratio and environmental benefits, among other positive attributes. This paper presents the estimation of higher-order modal parameters and their use in the verification and validation of an Equivalent Single-Layer (ESL) CLT model. The eigenvectors, eigenfrequencies, and modal damping ratios of 20 out-of-plane vibration modes were experimentally determined. The experimentally determined eigenfrequencies and eigenmodes were correlated and compared to those derived from a numerical model. The modal damping ratios were compared to damping loss factors derived from the power injection method. A broadband frequency view is also considered, with the comparison of experimental and numerical forced response models. As part of the verification and validation process, a framework of key indices and respective criteria is suggested and discussed in this contribution. Over the course of the paper, an ESL CLT model which derives its properties from a layerwise basis is validated in detail against experimental measurements. The results are intended to be of relevance to both structural and acoustic domains.
Key words: Cross-laminated timber (CLT) / Modal analysis / Vibro-acoustics / Homogenisation / Vibration serviceability
© The Author(s), Published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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