Research Article
Study on Acoustic Characteristics of a Flexible Plate Strongly Coupled with Rectangular Cavity
Table 2
The first eight natural frequencies of the strongly coupled plate-cavity system.
| | | Mode number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| | | 33.564 | 46.523 | 78.589 | 112.209 | 163.658 | 171.812 | 207.975 | 269.727 | | 33.548 | 46.580 | 78.575 | 85.232 | 125.997 | 137.665 | 162.189 | 175.863 | | 33.547 | 46.579 | 78.572 | 84.802 | 125.100 | 137.282 | 161.111 | 172.606 | | 33.547 | 46.579 | 78.572 | 84.797 | 125.090 | 137.275 | 161.095 | 172.552 | | 33.547 | 46.579 | 78.572 | 84.797 | 125.090 | 137.275 | 161.094 | 172.552 |
| | | 33.564 | 46.622 | 78.587 | 112.179 | 163.590 | 171.759 | 207.902 | 269.588 | | 33.548 | 46.580 | 78.574 | 85.211 | 125.963 | 137.635 | 162.141 | 175.742 | | 33.547 | 46.578 | 78.571 | 84.764 | 125.033 | 137.231 | 160.992 | 172.268 | | 33.547 | 46.578 | 78.571 | 84.757 | 125.020 | 137.220 | 160.965 | 172.175 | | 33.547 | 46.578 | 78.571 | 84.757 | 125.019 | 137.220 | 160.965 | 172.174 |
| | | 33.564 | 46.622 | 78.587 | 112.176 | 163.582 | 171.754 | 207.894 | 269.571 | | 33.547 | 46.580 | 78.573 | 85.211 | 125.962 | 137.634 | 162.140 | 175.741 | | 33.547 | 46.578 | 78.571 | 84.764 | 125.032 | 137.229 | 160.991 | 172.265 | | 33.547 | 46.578 | 78.571 | 84.757 | 125.018 | 137.218 | 160.962 | 172.167 | | 33.547 | 46.578 | 78.570 | 84.757 | 125.018 | 137.218 | 160.962 | 172.166 |
| FEM | 33.509 | 46.513 | 78.413 | 84.577 | 124.670 | 136.810 | 160.420 | 171.570 |
| Ref [21] | 33.574 | 46.596 | 78.608 | 84.102 | 124.680 | 137.112 | 161.082 | 172.334 |
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