This paper presents an example of dynamic simulation of complex system with rotating shafts, rigid rotors, and flexible bearings. Rigid rotor with 6 degrees of freedom and the static and dynamic imbalance was considered. The rigid rotor was closed in a single Simulink block that is connected to the blocks modeling rotating shafts. The output of the rotor block represents the actual rotor configuration in the space. The input signal consists of a resultant forces coming from the neighboring flexible shafts, and other forces such as mass forces and damping forces. In this article is also shown the concept of the Simulink block library for modeling and simulation of dynamic phenomena in systems of any configuration. The main part of the library is rigid rotor. Other components are: block modeling the bearing with stiffness, damping and mass, linear elastic-damping element, rigid beam finite element, massless linear-elastic beam element with internal damping, block modeling clutch. The assumption is that library is modular and expandable.
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