NDLI: Developing a Generalized Harmonic Balance Method for Accurate Identification of Crack Depth in a Continuous Shaft-Disc System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Khorrami, Hamid Sedaghati, Ramin Rakheja, Subhash
Copyright Year	2015
Abstract	In this work, the effect of a crack on the vibrational properties of a shaft-disc system has been studied applying a generalized harmonic balance method. In the reviewed literature, the reported methods to find the unbalance response of a continuous shaft-disc system provide only the first harmonic component of the response; whereas, the presented method gives the super-harmonic components as well. The shaft-disk system consists of a flexible shaft with a single rigid disc mounted on rigid short bearing supports. The shaft contains a transverse breathing crack (fatigue crack). The main concept for crack detection in vibration-based methods is basically the investigation of crack-induced changes in the selected vibrational properties. Shaft critical speeds and harmonic and super-harmonic components of the unbalance lateral response have been used as typical vibrational properties for crack detection in a rotating shaft system. A generalized harmonic balance method has been developed to efficiently investigate changes in vibrational properties due to the effect of crack properties, depth and location. The results of the developed analytical model have been compared with those obtained from the finite element model and close agreement has been observed.
Sponsorship	Aerospace Division
File Format	PDF
ISBN	9780791857304
DOI	10.1115/SMASIS2015-8954
Volume Number	Volume 2: Integrated System Design and Implementation; Structural Health Monitoring; Bioinspired Smart Materials and Systems; Energy Harvesting
Conference Proceedings	ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
Language	English
Publisher Date	2015-09-21
Publisher Place	Colorado Springs, Colorado, USA
Access Restriction	Subscribed
Subject Keyword	Finite element model Vibration Bearings Disks Crack detection Fracture (materials) Fatigue cracks
Content Type	Text
Resource Type	Article

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