|
Physical models for the
determination of the poro-acoustic and poro-elastic materials
properties
The software developed by Matelys are at
the forefront for the estimation of vibro-acoustic properties of
porous materials or multi-layer made with such materials. The data
is in a format compatible with the experimental systems SCS902A for
measuring the acoustic characteristics of the materials.
The suite of available applications include:
PAM-P Alphacell for the
properties for the prediction of acoustic absorption, sound
insulation, impedance and other parameters (diffuse field or normal
incidence), multilayered systems.
Alphacell is based on the Tranfer Matrix
method (TMM / FTMM) of layers of materials that includes porous,
solid or liquid (air) elements.
Alphacell has a very intuitive interface,
a database of materials, project management for the simulations, a
customizable report generation in PDF format. It is also planned to
export and import data to other softwre Matelys and with
experimental software SCS 90xx
PAM-RC RoKCell to
derive the parameters of the physical model relating to a single
matarial, whose partial data can be taken from experimental
characterization of samples using Kundt tube, Flow resistance,
Porosity-meter.
RoKCell is software characterization used
to determine the parameters representative of the visco-inertial and
thermal dissipation within a porous material on models of
Delaney-Bazley and Johnson-Champoux-Allard-Lafarge. RoKCell has two
main originality:
The method is implemented in a analytical
matrix inversion of all the parameters not directly measurable: it
is not based on any curve fitting method described by Panneton &
Olny;
Is one of the few software which allows
the determination of the static thermal permeability, a parameter
introduced by Lafarge et al. to improve the description of the
thermal dissipation in porous media.
ScalingCell is
based on a microscopic modeling - 2D or 3D micro-morphology of a
porous material - to determine its vibro-acoustic properties such as
the coefficient of absorption of sound or the transmission loss.
ScalingCell includes pre-and
post-processing and can import meshes from various CAD. It also
allows parametric studies.
ScalingCell can be coupled to Alphacell to
carry out comprehensive studies ranging from the description of the
micro-porous structure to estimate the performance of the
multi-layered system that incorporates a specific material.
ScalingCell is based on MPI and provides a
very efficient use of workstation computing.
 |
|
| |
|
|
Vibro-Acoustic
Material
Characteristics
Introduction
Experimental Devices
Physical Models
Software products to predict acoustic, elastic or thermodynamic properties of
porous materials or multi-layered structures including such materials
|
