A stability optimization model for shaft rotor-bearing systems

Abstract

The paper presents the modelling of unbalance in a shaft rotor-bearing system using energy methods and finite element analysis strategies. The modelling process brought about the review of three types of unbalance in the shaft rotor-bearing system. They include mass unbalances in the rotor disk, and misalignment in the flexible coupling, which includes parallel and angular misalignment. Each component in the unbalanced system was defined and modelled using energy methods. The forcing function causing unbalance introduced through the flexible coupling was also defined and modelled. Each component and the forcing function were integrated into the global shaft rotor-bearing unbalance system model. The output model was solved using numerical simulation analysis in Matlab. The result yielded a stability optimization model for managing balance in shaft rotor-bearing systems.

Keywords:

• machine stability
• rotor unbalance
• shaft misalignment
• parallel misalignment
• angular misalignment

ORCiD

Chiemela Onunka http://orcid.org/0000-0002-5707-9368