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Monday, July 8 • 11:00 - 13:30

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In the study of acoustic properties of porous metal materials at higher temperatures, the mechanism of sound absorption inside or outside of porous materials may involve physical fields' couplings such as acoustic, and temperature fields. The results obtained here are mainly related to the design of an improved experimental test system at high temperatures and essential acoustic parameters of porous materials - porosity, static or dynamic flow resistance, kinetic viscosity, and so forth - also including physical properties of free air. In the light of special requirement for the sizes of a developed test bench in authors' laboratory, a two-dimensional (2D) geometric model with scale of 1: 1 was established by employing software COMSOL. Some different simulation models are presented by applying sound absorption models embedded in COMSOL for porous media. After that the sound absorption properties of several porous metals are evaluated and compared with tested data. The work in this paper will provide a guide to the establishment of more complicated three-dimensional (3D) acoustic models, and also give an important reference for the improvement of existing experimental test system.

Monday July 8, 2019 11:00 - 13:30 EDT
St-Laurent 3, Board 12-A
  T08 Mat. for noise & vibr. cntrl., SS01 Pasv snd absorb & insul mtrl