Research Article
Study on Acoustic Characteristics of a Flexible Plate Strongly Coupled with Rectangular Cavity
Table 3
Natural frequencies under different boundary conditions.
| Boundary conditions | Results | Mode number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| SSSS | Present method | 33.547 | 46.578 | 78.571 | 84.764 | 125.033 | 137.231 | 160.992 | 172.268 | FEM | 33.509 | 46.513 | 78.413 | 84.577 | 124.670 | 136.810 | 160.420 | 171.570 |
| SSSC | Present method | 40.389 | 48.410 | 85.340 | 96.514 | 127.324 | 150.292 | 168.131 | 191.673 | FEM | 40.309 | 48.330 | 85.109 | 96.178 | 126.930 | 149.650 | 167.440 | 190.370 |
| SSCC | Present method | 48.625 | 50.755 | 93.262 | 108.600 | 130.969 | 164.836 | 175.427 | 213.522 | FEM | 48.480 | 50.651 | 92.932 | 108.070 | 130.500 | 163.880 | 174.590 | 211.580 |
| SCCC | Present method | 51.439 | 62.058 | 104.229 | 111.989 | 150.289 | 175.091 | 194.538 | 217.899 | FEM | 51.270 | 61.869 | 103.770 | 111.400 | 149.510 | 173.960 | 193.280 | 215.930 |
| CCCC | Present method | 55.198 | 75.789 | 115.662 | 117.261 | 172.088 | 187.087 | 210.256 | 228.636 | FEM | 54.993 | 75.459 | 115.010 | 116.620 | 170.820 | 185.720 | 208.430 | 226.560 |
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