Benchmark
Problems
Benchmark Problem C0-1F
-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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C0-1F
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frequency
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plate in baffle
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insulation
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Geometry: A thin plate (1 m*1 m) on the infinite rigid baffle
Boundary condition:
Boudary condition of the plate is simply supported edge. Plane wave with amplitude of 1 [Pa] is incident upon the plate perpendicularly. All surfaces on the baffle are rigid boundaries.
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. C0-1F-1:
Geometry of problem C0-1F (unit: m).
-Task A-
Distribution:
Sound pressure amplitude [Pa] at 101 points (R1), on the line x = 0.5, z = 0, located at 0.01 m intervals (y = 0, 0.01, …, 1.0)). In each octave-band mid-frequencies (f = 31.5, 63, 125, 250, 500, 1k, 2k, 4kHz). Then, the surface x = 0 is located on the mid-surface of the plate.
Dataform:
d-c0-0fa.xls
-Task B-
Frequency response:
Transmission loss [dB] of the plate. At the frequencies with 1 Hz intervals from 20 Hz to 4 kHz; or with 50 Hz intervals from 50 Hz to 4 kHz.