A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors

Table 2

Modal frequencies 𝜔_𝑛,𝑙 in rad/s, relevant to the imperfect rotor and evaluated according to 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%	27.0742	27.0746	27.9713	27.9718	28.4237	28.4242	28.6591	28.6596
𝛾=0.1%	27.0738	27.0746	27.9709	27.9718	28.4233	28.4242	28.6587	28.6596
𝛾=0.5%	27.0703	27.0746	27.9671	27.9718	28.4193	28.4242	28.6544	28.6596
𝛾=1%	27.0656	27.0746	27.9619	27.9718	28.4134	28.4242	28.6476	28.6596