A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors

Table 3

Relative error between frequency shifts relevant to the imperfect rotor, evaluated according to the HOM model and the EB model. The imperfection is introduced by increasing the mass of the fourth blade of the perfect rotor described in Section 4.1 by 𝛾=0.05%, 0.1%, 0.5%, and 1%, with respect to its nominal value. Modal frequencies relevant to modal numbers 𝑛=2⋅⋅⋅5 and 𝑙=1.

	𝑛=2	𝑛=3	𝑛=4	𝑛=5
𝛾=0.05%	0.0114	0.0281	0.0513	0.0824
𝛾=0.1%	0.0116	0.0283	0.0519	0.0834
𝛾=0.5%	0.0125	0.0299	0.0556	0.0906
𝛾=1%	0.0103	0.0261	0.0500	0.0828