This paper presents a detailed embedding of the misalignment effect into a dynamic simulation model. The mass, stiffness and damping matrices are firstly extracted using a finite element model. The equations of motions of the model with torque and residual unbalance excitations are formulated and solved using Ode45 variable step solver in a Simulink environment. Bearing forces are calculated and fed into the system. The displacements at the motor and rotor sides of the coupling are used along with interpolated stiffness values to calculate the misalignment forces, which are then fed to the system as excitation forces. In this model, the stiffness of the coupling is interpolated as a function of the shaft rotational speed and the level of misalignment. The vibration response is determined for a three -jaw love joy coupling at different levels of misalignment. The effects of the level of misalignment are discussed. Results from simulated data are compared to those measured. This approach provides a full interaction between the different components in the systems as opposed to the approach of steady state response extraction using frequency response functions.
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