An Alternative Approach to Determine the Dynamic Stiffness of Resilient Materials under Low Prestatic Load

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/144027
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Title: An Alternative Approach to Determine the Dynamic Stiffness of Resilient Materials under Low Prestatic Load
Authors: Carbajo, Jesús | Poveda-Martínez, Pedro | Segovia-Eulogio, Enrique-Gonzalo | Prieto, Andrés | Río-Martín, Laura | Pastor, José Daniel | Ramis-Soriano, Jaime
Research Group/s: Acústica Aplicada | Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES)
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Dynamic stiffness | Electrodynamic actuator | ISO 9052-1 | Electro-mechanical model
Issue Date: 6-Jun-2024
Publisher: MDPI
Citation: Applied Sciences. 2024, 14(11): 4925. https://doi.org/10.3390/app14114925
Abstract: Dynamic stiffness is a parameter of great importance for the assessment of the sound insulation properties of resilient materials commonly used under floating floors in dwellings. This work proposes a simplified approach that relies on an electro-mechanical circuit model for the determination of this parameter using a two-degree-of-freedom system of masses and springs. Unlike the method described in the standard ISO 9052-1, the proposed approach uses a single electrodynamic actuator both as an impulser and vibration sensor, thus reducing the instrumental requirements and yielding a more stable arrangement. By measuring the input electrical impedance of the mass-loaded actuator when coupled to a slab–material system it was possible to retrieve the mechanical mobility function thereof and thus obtain the dynamic stiffness of the material. Several materials were tested following the proposed approach, with results showing good agreement when compared to those obtained following the standardized procedure. In general, the preliminary research encourages the use of the proposed approach for characterization purposes.
URI: http://hdl.handle.net/10045/144027
ISSN: 2076-3417
DOI: 10.3390/app14114925
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: https://doi.org/10.3390/app14114925
Appears in Collections:INV - GRESMES - Artículos de Revistas
INV - Acústica Aplicada - Artículos de Revistas

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