FINE - Acoustics Software

CAPABILITIES:

• Acoustic sources retrieved from experiments or defined analytically.
• Noise propagation analysis in uniform and non-uniform mean flows.
• Sound absorption from porous/fibrous materials and perforated sheets.
• Impedance boundary condition to simulate acoustic liners.

METHODS:

• Iterative FEM (Finite Element Method) and BEM (Boundary Element Method) solvers, for propagation analysis,based on multi-frequency parallelization technology.
• FW-H (Ffowcs Williams-Hawkings) solver for radiation analysis, compatible with fixed/rotating, solid/porous radiation surfaces.   
• Impedance Matrix method for the Transmission Loss analysis of mufflers and exhaust systems.
• Eigenvalues analysis for cavity modes detection.

VIBRO- ACOUSTICS

CAPABILITIES:

• Structure excitation based on acoustic sources, unsteady pressure fields and point forces applied to the vibrating structure.
• Fluid-structure coupling based on import of structural modes (from NASTRAN, ABAQUS, ANSYS).

METHODS:

• FEM-BEM solvers for fully coupled vibro-acoustic simulations.
• Mixed direct-indirect BEM approach to include thin shells in frequency response analysis.
• FEM cavity modes analysis including sound absorption and structure vibration.
  

AERO- ACOUSTICS

CAPABILITIES:

• Efficient simulation of TONAL and BROADBAND noise sources thanks to the full integration with NUMECA’s CFD methods (used for noise source characterization).
• Possibility to exploit CFD solutions obtained with any CFD tool on the market (import of CGNS, Tecplot, FieldView file formats).

 METHODS:

• Integration with the Nonlinear Harmonic (NLH) method for the simultaneous simulation of TONAL noise source and propagation including liners (ASME GT2014-26429 and ETC ETC2015-197 papers).
  Orders of magnitude faster than with propagation approaches based on unsteady CFD solutions.
• FINE™/Acoustics includes the Flow-Noise method for the analysis of BROADBAND noise based on the reconstruction of synthetic turbulence from a steady RANS solution (SAE 2015-01-2329 paper). 
• LES, DES, U-RANS solutions can be imported in FINE™/Acoustics and used to characterize the source region and to compute the sound propagation.