DEVELOPPED AT SIMIDEA R&D:
ADVANCED ACOUSTIC MATERIALS
… AND ALL IMPLEMENTED IN COMPUTER SOFTWARE.
- Software Poroacustica: Analytical simulation of advanced materials, where the microscopic effects and intermolecular forces influence the macroscopic behaviour of the aggregate. The software captures the acoustic macroscopic behaviour related to scattering, resonance, and dissipation effects at microscopic level.
- Software FE Poroacústica: Finite Element version of the Software Poroacústica. Full space-time variational formulation. 3D analysis in frequency and time domains. Couple or uncouple space-time approach. Numerical simulation of advanced porous materials with chemical treatments.
- Software Analiza: Analysis of acoustic experimental data of advanced materials.
- Software Identifica: Experimental characterization of advanced materials based on inverse identification techniques.
- Software Optimiza: Custom design of advanced materials by optimization of advance materials to produce extreme acoustic capacity for every specific defence or civil application and configuration. See figure 1 for illustration.
Hereafter, a validation where the exact analytical solutions of Software Poroacustica are compared with the approximate numerical solutions of Software FE Poroacustica, both have been developed at SIMIDEA R&D. It is the simulation of a human bone saturated with salt water, which has been characterized experimentally. The exact analytical solution was previously validated with experimental results. The 21 variables of the model, that is, the 3 displacements, the 6 deformations and the 6 stresses of the solid skeleton, and for the fluid, the potential function, the 3 displacements, the cubic dilatation and interstitial pressure, in the domains of time, space and frequency, are validated in the entire frequency range, from 0 to 100 kHz. This validation is very relevant for signature reduction in submarine acoustics for the defence industry, where the media is salt water, and a submarine can be detected from very low frequencies up to 500 kHz.