Research Article
Periodic Responses of a Rotating Hub-Beam System with a Tip Mass under Gravity Loads by the Incremental Harmonic Balance Method
Figure 4
Variations of first four dimensionless natural frequencies as functions of rotating angular velocity and hub radius ratio for tip mass : (a) first natural frequency ; (b) second natural frequency ; (c) third natural frequency ; and (d) fourth natural frequency .
(a) |
(b) |
(c) |
(d) |