A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors

Table 4

Relative error between frequency shifts relevant to the imperfect rotor, evaluated according to the HOM model and the L-HOM 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%	0.0032	0.0054	0.0087	0.0125
𝛾=0.1%	0.0064	0.0108	0.0173	0.0250
𝛾=0.5%	0.0319	0.0539	0.0860	0.1233
𝛾=1%	0.0665	0.1122	0.1777	0.2507