Vibration Behavior of Misaligned Rotor with the Asymmetric Shaft Using Theory of Timoshenko Beam

In the present study, an accurate model is used for analyzing asymmetric shaft with misalignment and under unbalance forces in rotating coordinates verified by developing experimental test.The rotor modeled Timoshenko beam theory coupled to a motor.The differential equations of motion are discretized Rayleigh-Ritz method derived from Hamilton's principle. Thereafter, According results, frequency range detected which,resonance instability will occur. The dynamic behavior investigated near boundary region. Various parameters, including unbalanced induced forces, dimensions cross-section taken into account.Finally,vibration responses system their Fast Fourier Transform (FFT) presented graphically determine frequencies harmonic responses. It concluded that asymmetry fault severely affect response rotor.Moreover, accuracy results increased applying theory.By test connected electric motor fault, verifying this has been done.The obviously obtained unstable operating area as acquired motion.