Research Article
Vibration and Instability of Rotating Composite Thin-Walled Shafts with Internal Damping
Table 2
Modal frequencies of cantilever composite box beam:
.
| Mode | Natural frequency (Hz) | Present |
Reference [18] | | | |
| First flapping | 3.12 | 3.13 | 3.13 | 3.1 | Second flapping | ā | 19.02 | 19.02 | 19.8 | First sweeping | 10.80 | 10.81 | 10.81 | 11.0 | Second sweeping | ā | 68.38 | 68.38 | 65.6 | First torsional | 37.83 | 37.84 | 37.84 | 37.7 | Second torsional | 112.91 | 113.01 | 113.01 | 113.3 |
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