Benchmark
Problems
Benchmark Problem C0-2F
-Properties-
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category
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type
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index
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domain
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object
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note
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C. structural-acoustic
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0. basic
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C0-2F
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frequency
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reverberation room
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scattering
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Geometry: Cubic cavity (1 m * 1 m * 1 m) with a thin plate (1 m*1 m) located on the surface z = -0.25.
Boundary condition:
Boundary condition of the plate is simply supported edge. All surfaces inside the cubic cavity are rigid boundaries. A point source (S) is located at (0.5, -0.5, -0.4), assuming its stationary vibration with volume acceleration amplitude 1.0 m3/s2.
Physical properties of the plate:
Thickness : 0.01 m
Young’s modulus : 7.5*1010 N/m2
Poisson’s ratio : 0.22
Density : 2500 kg/m3
Loss factor : 0.002
Fig. C0-2F-1:
Geometry of problem C0-2F (unit: m).
-Task A-
Distribution:
Sound pressure amplitude [Pa] at 101 points (R1), on the line x = 0.5, located at 0.01 m intervals (y = -0.5, ..., 0.5). At the octave-band mid-frequencies (f = 31.5, 63, 125, 250, 500, 1k, 2k, 4k Hz).
Dataform:
d-c0-0fa.xls
-Task B-
Frequency response:
Sound pressure amplitude [Pa] at 3 points (0.5, 0.5, -0.5) (R2), (0, 0.5, 0) (R3) and (0.4, 0.3, 0.2) (R4). At the frequencies with 1 Hz intervals from 20 Hz to 4 kHz, or with 10 Hz intervals from 20 Hz to 4 kHz.