LARGE INPLANE MOTION OF A ROTOR

The vibrations of the in-plane rotor system with nonlinear elastic and geometric properties are considered in this paper. The vibrations of the rotor are described as the system of ten partial differential equa tions and ten boundary conditions. Approximate Galerkin procedure is u sed to obtain the second order nonlinear differential equation. The re sponse frequencies of the system are discussed. It is shown that they are functions of angular velocity of the rotor and nonlinear propertie s of the system.