Research Article
Free Vibration Analysis of Rotating Pretwisted Functionally Graded Sandwich Blades
Table 8
Nondimensional frequency parameters for the first six modes of the FG sandwich blade with varying aspect ratio (
, , , and
).
| Mode | 1.00 | 1.25 | 1.50 | 1.75 | 2.00 | 2.25 | 2.50 | 3.00 | 4.00 | 5.00 |
| 1st | 4.4970 | 4.5187 | 4.4946 | 4.4879 | 4.4857 | 4.4847 | 4.4762 | 4.4743 | 4.4643 | 4.4475 | 2nd | 18.7284 | 20.8402 | 22.6114 | 24.2429 | 25.4037 | 25.4146 | 25.4190 | 25.4167 | 25.4069 | 25.3682 | 3rd | 25.0639 | 25.2854 | 25.3453 | 25.3845 | 25.9349 | 27.5549 | 29.2911 | 33.0633 | 40.4134 | 48.5665 | 4th | 35.6083 | 49.9937 | 61.8109 | 68.2541 | 70.4597 | 71.6661 | 72.3847 | 73.0937 | 73.8139 | 73.9446 | 5th | 45.7901 | 53.9883 | 63.0533 | 69.0347 | 75.8721 | 82.0019 | 87.1364 | 89.2792 | 91.5483 | 93.0731 | 6th | 58.3492 | 65.8222 | 76.2076 | 82.7443 | 84.4782 | 85.9505 | 88.1750 | 99.5237 | 123.1095 | 147.6281 |
|
|