Research Article
Analysis of Acoustic Characteristics of Arbitrary Triangular Prism and Quadrangular Prism Acoustic Cavities
Table 4
The first eight natural frequencies (Hz) of quadrangular prism acoustic cavities with different shapes.
| Mediums | Shapes | Model sequence | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Air | Quadrilateral | 208.17 | 235.92 | 340.00 | 344.78 | 396.33 | 398.66 | 413.83 | 464.77 | 208.17a | 235.87 | 339.94 | 344.76 | 396.17 | 398.54 | 413.67 | 464.61 | Square | 170.00 | 170.00 | 240.42 | 340.00 | 340.00 | 340.00 | 380.13 | 380.13 | 169.99a | 169.99 | 240.39 | 339.94 | 339.94 | 339.94 | 380.03 | 380.03 | Rectangular | 85.00 | 170.00 | 170.00 | 190.07 | 240.42 | 255.00 | 306.47 | 340.00 | 85.00a | 169.99 | 169.99 | 190.05 | 240.39 | 254.98 | 306.41 | 339.94 | Rhombus | 144.75 | 226.67 | 226.67 | 331.34 | 340.00 | 369.53 | 373.46 | 392.60 | 144.74a | 226.64 | 226.66 | 331.25 | 339.94 | 369.43 | 373.39 | 392.51 | Trapezoidal | 164.29 | 204.61 | 277.48 | 340.00 | 340.90 | 375.55 | 377.61 | 396.82 | 164.28a | 204.59 | 277.44 | 339.94 | 340.85 | 375.43 | 377.51 | 396.69 |
| Water | Quadrilateral | 906.14 | 1026.94 | 1480.00 | 1500.80 | 1725.20 | 1735.36 | 1801.39 | 2023.12 | 906.06a | 1026.90 | 1479.80 | 1500.50 | 1724.60 | 1734.80 | 1800.80 | 2022.50 | Square | 740.00 | 740.00 | 1046.52 | 1480.00 | 1480.00 | 1480.00 | 1654.69 | 1654.69 | 739.97a | 739.97 | 1046.40 | 1479.80 | 1479.80 | 1479.80 | 1654.20 | 1654.20 | Rectangular | 370.00 | 740.00 | 740.00 | 827.35 | 1046.52 | 1110.00 | 1334.05 | 1480.00 | 370.00a | 739.97 | 739.97 | 827.29 | 1046.40 | 1109.90 | 1333.80 | 1479.80 | Rhombus | 630.09 | 986.67 | 986.73 | 1442.29 | 1480.00 | 1608.54 | 1625.65 | 1708.09 | 630.05a | 986.54 | 986.65 | 1441.90 | 1479.80 | 1608.10 | 1625.40 | 1708.60 | Trapezoidal | 715.14 | 890.64 | 1207.85 | 1480.00 | 1483.93 | 1634.76 | 1643.72 | 1727.32 | 715.11a | 890.57 | 1207.70 | 1479.80 | 1483.70 | 1634.20 | 1643.30 | 1726.80 |
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aResults from finite element software ABAQUS.
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