Review on Dynamic Modeling and Vibration Characteristics of Rotating Cracked Blades

Abstract

As one of the most important parts in the engine, the structure and state of the rotating blade directly affect the normal performance of the aero engine. In order to monitor engine crack failure and ensure flight safety, it is necessary to carry out research on the dynamic modeling of the cracked blade and breathing crack induced vibration mechanisms. This paper summarizes the current research status on the dynamics of cracked blade and the related topics mainly include four aspects: crack propagation path, mechanical model of open and breathing cracks, dynamic modeling methods of cracked blades such as lumped mass model, semi-analytical model and finite element model, and dynamic characteristics of cracked blades. The review will provide valuable references for future studies on dynamics and fault diagnosis of cracked blade in aero engine.