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8<br />
Activating Acoustic Elements<br />
© 2011 ANSYS, Inc. November 22,<br />
2011<br />
A “Commands (APDL)” object is inserted under the<br />
acoustic bodies<br />
In the example shown on<br />
the right, the “et”<br />
command changes the<br />
element type to be an<br />
acoustic element using<br />
the new symmetric FSI<br />
algorithm.<br />
Density and speed <strong>of</strong><br />
sound are also defined.<br />
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