In this
article, a model of a rotor with an asymmetric disk is presented in order to
represent Campbell’s diagrams and instability maps as a function of the
rotations of the support which can significantly change the dynamic behavior of
the rotor. Critical rotating speeds can also lead to unacceptable levels of
vibration. Indeed, the critical speeds are a function of the dynamic rigidity
of the rotating systems and the presence of the gyroscopic forces creates a
dependence between the rotating speed of rotation and the natural frequencies
to such structures (the CAMPBELL diagrams): this implies that the correct
determination of the critical speeds is one of the essential elements when
sizing such dynamic systems.
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