What are the main features of the system equation of motion?

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Rotor-bearing system having discrete discs and bearings and shaft with distributed mass and elasticity is considered in the present study. Dynamic modeling of the rotor-bearing system using finite elements developed by Nelson and McVaugh19 and the extended model by Ozguven and Ozkan20 have been used in the current work. Internal damping is neglected here. The rotor shaft is discretized into finite beam elements as shown in Figure 1. The beam element has two nodes and four degrees of freedom at each node represented by q1 – q8 for bending mode.  Two translational degrees of freedom are represented by  q1, q2, q5, and q6, and two...
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