Dynamic Behaviour and Crack Detection of a Multi Cracked Rotating Shaft using Adaptive Neuro-Fuzzy-Inference System: Vibration Analysis of Multi Cracked Rotating Shaft

1. Introduction

All metal members that are subjected to vibration and cyclic stresses in more or less localized areas, cracks may occur. Since cracks cannot be easily seen with the naked eyes, the non-destructive testing methods like ultrasonic testing, X-ray, etc. can be used to detect them. However, these methods are costly and time-consuming for complex or large structures. For this reason, the vibration-based structural health monitoring methods, especially those based on the change of modal parameters (frequencies, shape and damping), have been explored for detecting cracks. These vibration-based techniques have been applied to a variety of engineering structures, such as beams, trusses, rotors, etc.