Research Article
Analysis of Acoustic Characteristics of Arbitrary Triangular Prism and Quadrangular Prism Acoustic Cavities
Table 3
The first eight natural frequencies (Hz) of triangular prism acoustic cavities with different shapes.
| Mediums | Shapes | Model sequence | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Air | Isosceles | 192.21 | 235.78 | 340.00 | 356.04 | 390.57 | 413.07 | 413.75 | 462.38 | 192.21a | 235.78 | 340.00 | 356.05 | 390.57 | 413.11 | 413.75 | 462.42 | Equilateral | 226.67 | 226.67 | 340.00 | 392.60 | 408.63 | 408.63 | 453.33 | 453.33 | 226.65a | 226.65 | 339.94 | 392.50 | 408.50 | 408.50 | 453.21 | 453.21 | Right angle | 99.54 | 178.88 | 212.49 | 266.47 | 318.68 | 340.00 | 353.16 | 354.27 | 99.54a | 178.87 | 212.47 | 266.46 | 318.64 | 339.64 | 353.14 | 354.20 | Obtuse angle | 89.70 | 156.70 | 211.57 | 272.20 | 322.27 | 340.00 | 340.99 | 351.63 | 89.70a | 156.71 | 211.70 | 272.70 | 322.17 | 339.52 | 341.94 | 351.01 | Acute angle | 106.15 | 194.28 | 207.14 | 281.53 | 328.05 | 340.00 | 356.19 | 366.87 | 106.15a | 194.28 | 207.13 | 281.51 | 328.01 | 339.94 | 356.11 | 366.82 |
| Water | Isosceles | 836.68 | 1026.32 | 1480.00 | 1549.83 | 1700.13 | 1798.09 | 1801.03 | 2012.71 | 836.64a | 1026.20 | 1479.80 | 1549.60 | 1699.70 | 1797.60 | 1800.50 | 2012.20 | Equilateral | 986.67 | 986.67 | 1480.00 | 1708.96 | 1778.74 | 1778.74 | 1973.34 | 1973.34 | 986.61a | 986.61 | 1479.80 | 1708.50 | 1778.20 | 1778.20 | 1972.80 | 1972.80 | Right angle | 433.30 | 778.64 | 924.94 | 1159.94 | 1387.20 | 1480.00 | 1537.29 | 1542.13 | 433.30a | 778.61 | 924.89 | 1159.90 | 1387.00 | 1479.80 | 1537.20 | 1541.80 | Obtuse angle | 390.47 | 682.10 | 920.94 | 1184.87 | 1402.84 | 1480.00 | 1484.31 | 1530.64 | 390.46a | 682.12 | 921.12 | 1185.50 | 1402.70 | 1479.40 | 1485.30 | 1529.90 | Acute angle | 462.08 | 845.71 | 901.66 | 1225.49 | 1427.98 | 1480.00 | 1550.46 | 1596.96 | 462.08a | 845.67 | 901.61 | 1225.40 | 1427.80 | 1479.80 | 1550.10 | 1596.80 |
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aResults from finite element software ABAQUS.
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