AACTx_R150_L-01_ Introduction to Acoustics
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Acoustics ACTx R150
1 © 2011 ANSYS, Inc. January 8, 2014
Acoustics ACTx
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© 2011 ANSYS, Inc.
January 8, 2014
Acoustics ACT Extension
• • A library of helpful ACT extensions
available to any ANSYS customer • Roughly one dozen available • More being added continually
Great place to get started
In order to work properly please note English language in WorkBench have to be chosen.
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Acoustics ACT Extension
ACT Acoustics extension can be used to create acoustic boundary conditions and defining fluid bodies (elements & material properties):
January 8, 2014
Acoustic Analysis
An acoustic analysis, available in the ANSYS Multiphysics and ANSYS Mechanical programs only, usually involves modeling the fluid medium and the surrounding structure. Typical quantities of interest are the pressure distribution in the fluid at different frequencies, pressure gradient, particle velocity, the sound pressure level, as well as, scattering, diffraction, transmission, radiation, attenuation, and dispersion of acoustic waves.
A coupled acoustic analysis takes the fluid-structure interaction into account. An uncoupled acoustic analysis models only the fluid and ignores any fluidstructure interaction. The program assumes that the fluid is compressible, but allows only relatively small pressure changes with respect to the mean pressure. Also, the fluid is assumed to be non-flowing. The pressure solution is the deviation from the mean pressure, not the absolute pressure.
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Download the Acoustics ACT Extension
The Acoustics ACT Extension for ANSYS 15.0 is available for download on the ACT Extension Library of the Customer Portal:
So to report an issue or provide your feedback in regards to this extension please contact:
David Roche:
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david.roche@
Expose 3D acoustic features in Mechanical without the need for APDL • Define acoustics properties • Apply acoustic boundary conditions & loads • Postprocess acoustic results
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© 2011 ANSYS, Inc.
January 8, 2014
Sound
Noise can be defined as " undesired sound or disagreeable.
From the acoustics point of view, sound and noise constitute the same phenomenon of atmospheric pressure fluctuations about the mean atmospheric pressure. The differentiation is greatly subjective.
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Underwater acoustics
Design of speakers, speaker housings, acoustic filters, mufflers, and many other similar devices. Geophysical exploration
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• Extensions made available in either
binary format (.wbex file) or binary plus scripted format (python and XML files) • Scripted extensions are great examples • Links to ACT documentation and training material • Goals for an ACT developers forum
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© 2011 ANSYS, Inc.
January 8, 2014
Introduction to Acoustics
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© 2011 ANSYS, Inc.
January 8, 2014
Applications
Acoustics is the study of the generation, propagation, absorption, and reflection of sound pressure waves in a fluid medium. Applications for acoustics include the following: • • • • Sonar - the acoustic counterpart of radar Design of concert halls, where an even distribution of sound pressure is desired Noise minimization in machine shops Noise cancellation in automobiles
If you need more information about ACT please contact your sales repr来自sentative.4
© 2011 ANSYS, Inc.
January 8, 2014
ACT Extension Library
ANSYS Customer Portal
ACT Acoustics extension is a customization made with ACT to integrate ANSYS acoustics capabilities in Mechanical. The extension consists of one XML file (Configures the UI content) and one python script (Implements the extension functionality).
Sound (or noise) is the result of pressure variations, or oscillations, in an elastic medium (e.g., air, water, solids), generated by a vibrating surface, or turbulent fluid flow. Sound propagates in the form of longitudinal (as opposed to transverse) waves, involving a succession of compressions and rarefactions in the elastic medium. When a sound wave propagates in air, the oscillations in pressure are above and below the mean pressure.
Installing ACT Extensions
Installing from WB Project page: 1. Select the “Install Extension …” option 2. It will open a file dialog to select a “*.wbex” file 3. The extension is installed