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A new shaft element model with 10 degrees of freedom for coupled torsional-flexural vibration of rotor systems is developed. The model is based on an extended Hamilton's principle and includes the effects of translational and rotational inertia, gyroscopic moments, bending, shear and torsional deformations, internal viscous and hysteretic damping, and mass eccentricity. The practical efficiency...
A new approach is developed for calculating the dynamic response of multi-spool rotor systems with several intershaft bearings using the combined methodologies of the finite element method (FEM), transfer matrices (TM) and impedance methods. The approach makes use of FEM to model shaft elements and then transforms the system properties to transfer matrix mode. The intershaft bearings are treated...