Research Article
Determination of the Fundamental Frequency of Perforated Rectangular Plates: Concentrated Negative Mass Approach for the Perforation
Table 1
Specimen parameters.
| Specimen no. | (mm) | (mm) | (mm) | (mm) | (/) |
| 1 | 138 | 216 | 2 | 5 | 1518.154 | 2 | 138 | 216 | 2 | 10 | 379.5384 | 3 | 138 | 216 | 2 | 15 | 168.6837 | 4 | 138 | 216 | 2 | 25 | 60.72615 | 5 | 138 | 216 | 2 | 30 | 42.17094 | 6 | 276 | 432 | 2 | 10 | 1518.154 | 7 | 276 | 432 | 2 | 20 | 379.5384 | 8 | 276 | 432 | 2 | 25 | 242.9046 | 9 | 276 | 432 | 2 | 50 | 60.72615 | 10 | 276 | 432 | 2 | 65 | 35.93263 |
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