Acoustical Analysis of a Test Horn

Young In Moon‏

يناير 1988 · Flight Dynamics Laboratory, Air Force Wright Aerodynamics Laboratory, Air Force Systems Command, United States Air Force

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The natural frequencies and mode shapes for three models of a small test horn are determined using the 3-D acoustic finite element computer program COMIC (COMplex AcoustIC Pressure Analysis). The mode shapes are presented graphically and nodal planes are identified. Placing a wall of blocks and a missile inside the model does not make any significant change in natural frequencies, although the nodal planes have moved in the direction of the added elements.