Affiliation:
1. Laboratory of Structural Mechanics and Coupled Systems (LMSSC), Conservatoire National des Arts et Métiers (CNAM), 75003 Paris, France
Abstract
This research aims to investigate the impact of incorporating porous materials on reducing noise and vibration in wooden floor panels, and to analyze the vibroacoustic performance of the assembled panel under different types of excitation and boundary conditions, particularly in the lower frequency range. The study begins with an experimental investigation and numerical modeling to determine the mechanical properties of the orthotropic wood material used in the floor panels. Subsequently, a finite element formulation, based on a variational approach, is presented to study the vibroacoustic response of an elastic structure coupled with a porous material exhibiting realistic behavior. The porous material is characterized by two phases: solid and fluid, represented in the formulation through the displacement field for the solid phase and the pressure for the fluid phase. This formulation offers the advantage of reduced computation cost and simplifies the coupling between all domains. To calculate the acoustic radiation of the structure, the Rayleigh integral is employed. Utilizing the proposed numerical approach, a comprehensive study is conducted to analyze the reduction in vibration–acoustic response of the floor with the incorporated porous layer, taking into account different types of excitation and boundary conditions applied to the system.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference34 articles.
1. Vibration issues in timber structures: A state-of-the-art review;Aloisio;J. Build. Eng.,2023
2. Investigation of dissipative effects in a poroelastic layer coated plate;Rigobert;J. Acoust. Soc. Am.,1999
3. Sound radiation of hollow box timber floors under impact excitation: An experimental parameter study;Conta;Appl. Acoust.,2020
4. Titirla, M., Michel, L., and Ferrier, E. (2018, January 17–19). Mechanical behavior of hybridal floor panels to timber columns joints. Proceedings of the 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018, Paris, France.
5. Titirla, M., Benakli, S., and Larbi, W. (2021, January 28–30). Dynamic and vibroacoustic response of timber floor panels. Measurements and non-linear numerical simulations. Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2021, Athens, Greece.