Actran Acoustics0 pages

DATASHEET

MSC Software: Product Datasheet - ActranTM Acoustics

Actran Acoustics
™

The Most Efficient Solution for Predicting Acoustic Radiation

Key Features

Product Overview
Rich and powerful acoustic features for your simulation needs
Actran Acoustics contains a wide set of acoustic modeling features making it the CAE tool of
choice for the simulation of a large variety of problems, from the simplest components to the
most elaborate systems.
Sound fields in cavities are accurately and efficiently analyzed with Actran Acoustics in both
modal and physical approaches. Absorbing walls may be modeled in detail using impedance
conditions or porous material models having fluid equivalent properties.
Actran Acoustics is uniquely suited for sound radiation analysis, where it brings unprecedented
efficiency, speed and productivity to your analysis process. Actran Acoustics features interfaces
with most FEA structural analysis codes such as MSC Nastran, ABAQUS™ or ANSYS™. The
sound radiation from vibrating structure into far field is accurately predicted using Free Field
Technologies’ exclusive, powerful and robust acoustic finite and infinite element libraries.
The APML (Adaptive Perfectly Matched Layer) technology complements the infinite element
technology, especially for dealing with larger problems at higher frequencies. RADACT, an
integrated chain utility, allows engineers to streamline an automated sound radiation process
and visualize meaningful results such as structure panel contribution and mode contribution.
Actran Acoustics offers powerful features for analyzing sound propagation in ducts at both
component level (e.g. muffler volume) and system level (e.g. entire intake/exhaust lines).
Engineers could rely on Actran for designing intake and exhaust lines or air distribution systems
in buildings and aircraft.
Among the many advanced features available in Actran Acoustics are the handling of a mean
flow field (convected acoustic propagation) and temperature gradient effects. Specific elements
are also available to handle visco-thermal effects that are important when sound waves
propagates in narrow ducts or thin cavities (e.g.: hearing aids, solar array panels, etc.).

Target Applications
•tSound radiation by vibrating structures: powertrain, engine components (oilpan, intake
manifold, valve cover, etc.), compressors, electrical motors, loudspeakers and more
•tSound produced by pulse signals: golf club, watch repeater, etc.
•tIntake and exhaust noise, including air filters, complex mufflers, catalytic converters, etc.
•tAir conditioning units and distribution systems (calculation of transfer matrices coefficients)
•tSound absorption inside passenger compartment of cars, trains and aircraft
•tSound propagation in complex media with mean flow or temperature gradient
•tAudio devices such as telephones, hearing aids or musical instruments

•t Standard and convected acoustics
•t Extraction of cavity modes
•t Handling of heterogeneities such as complex
flows or temperature gradients
•tAccount for dissipation mechanisms such as
visco-thermal losses, acoustic absorption...
•t Direct response and modal superposition
approaches
•t Unique library of stable infinite elements for
modeling anechoic boundary conditions
•tAPML (Adaptive Perfectly Match Layer)
•t Pressure, velocity and admittance boundary
conditions
•t Plane, spherical and cylindrical wave sources
and excitation of ducts by incident plane waves
•t Retrieving vibration results from most FEA
structural analysis solvers
•tTMM (Transfer Matrix Method) for analyzing and
optimizing entire intake/exhaust lines
•t RADACT utility for automation of the analysis
process of acoustic radiation
•t Direct and iterative solvers for reduced CPU
times
•t Krylov solver for fast frequency response
analysis
•tAvailable platforms: Windows 32 & 64 bit, Linux
and most Unix platforms
•t Integration in Actran VI