Research Article
Vibration Analysis of Thin Plate Structures Subjected to a Moving Force Using Frequency-Domain Spectral Element Method
Table 2
Comparison of the natural frequencies (Hz) of the three-span plate with S-S-S-S supports (Example 4) obtained by the FEM [
38], ANSYS [
39], and SEM.
| Mode number | FEM (nE, nD) | ANSYS (nE, nn) | SEM (nE, nD) | nE = 40 × 10, nD = 1265 | nE = 120 × 30, nD = 11005 | nE = 480 × 120, nD = 173635 | nE = 400 × 100, nn = 40501 | nE = 3 × 1, nD = 1584 |
| 1 | 1.268 | 1.267 | 1.267 | 1.267 | 1.267 | 2 | 3.013 | 3.008 | 3.007 | 3.007 | 3.007 | 3 | 3.019 | 3.018 | 3.018 | 3.018 | 3.018 | 4 | 3.471 | 3.465 | 3.465 | 3.465 | 3.465 | 5 | 4.595 | 4.594 | 4.594 | 4.594 | 4.594 | 6 | 4.814 | 4.813 | 4.813 | 4.813 | 4.813 | 7 | 5.026 | 5.017 | 5.016 | 5.016 | 5.016 | 8 | 7.347 | 7.345 | 7.345 | 7.345 | 7.345 | 9 | 9.388 | 9.362 | 9.359 | 9.359 | 9.359 | 10 | 9.433 | 9.481 | 9.487 | 9.487 | 9.487 |
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Note. nE = total number of finite elements, nD = total number of DOFs, and nn = total number of nodes.
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