Negative potential energy content analysis in cracked rotors whirl response

Abstract Appearance of transverse cracks in rotor systems mainly affects their stiffness content. The stability such at steady-state running is usually analyzed by using the Floquet’s theory. Accordingly, instability zones rotational speeds are dominated negative content whirl response vicinity critical speeds. Consequently, an effective measure introduced here to analyze effect crack and unbalance force vector orientation on intensity potential response. expression obtained from direct integration equations motion considered cracked system. proposed applied for transient operations Jeffcott model with open breathing models. numerical experimental responses found be critically depending propagation level orientation. Therefore, this can as a detection tool that either exhibit recurrent passage through or running.