Free Vibration and Damping of Rotating Composite Shaft with a Constrained Layer Damping

Table 2

Comparison of natural frequencies (Hz) for composite thin-walled tube.

(degree)	1st	2nd	1st, EMBT [5]	2nd, EMBT [5]	1st, LBT [5]	2nd, LBT [5]
0	426.81	1224.92	426.92	1225	426.92	1224.9
15	429.84	1404.43	429.95	1404.5	429.95	1404.5
30	324.99	1203.21	325.11	1203.3	325.12	1203.3
45	216.52	832.52	216.62	832.61	216.62	832.61
60	164.95	638.56	165.17	638.65	165.18	638.66
75	145.69	558.88	145.79	558.95	145.8	558.95
90	139.94	526.95	140.13	527.04	140.13	527.04