Book ChapterDOI
Dynamics of Cracked Shafts
Andrew D. Dimarogonas,Stefanos A. Paipetis,Thomas G. Chondros +2 more
- pp 145-161
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TLDR
In this paper, the problem of cracked rotor dynamics is discussed and an analytical formulation for crack local flexibility in relation to crack depth yields a supervisory instrument which can give an early crack warning.Abstract:
The problem of cracked rotor dynamics is discussed in Chap. 6. Analytical formulation for crack local flexibility in relation to crack depth yields a supervisory instrument which can give an early crack warning. Fracture mechanics methods provide stress intensity factors for the investigation of rotor’s dynamic performance for varying crack depth. Open cracks lead to linear systems, while closing cracks lead to non-linear ones. Analytical solutions are obtained, which can be used to monitor crack propagation or to identify cracks in service.read more
Citations
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Journal ArticleDOI
Nonlinear dynamics of a rotating shaft with a breathing crack
TL;DR: In this article, the effects of a breathing crack on the vibratory characteristics of a rotating shaft are investigated and a new, simple and robust model composed of two rigid bars connected with a nonlinear flexural spring is proposed.
Journal ArticleDOI
Free vibration study of v-shape and rectangular shape double-sided cracks in a cantilever beam
V. Khalkar,S. Ramachandran +1 more
TL;DR: In this paper, a mathematical model was developed by W. M. Ostachowicz and M. Krawczuk for the cantilever beam which has two open double-sided v-shape cracks.
Journal ArticleDOI
Dynamic analysis on rotor-bearing system with coupling faults of crack and rub-impact
TL;DR: In this paper, an improved switching crack model is presented to analyze the dynamic characteristics of a rotor bearing system with imbalance, rub-impact, and transverse crack, and various nonlinear dynamic phenomena are analyzed using numerical method.
Failure analysis of a generator rotor with a deep crack detected during operation : fractographic and fracture mechanics approach
TL;DR: In this paper, the authors report the results of an activity of failure analysis performed on a 370 MVA generator rotor that was scrapped after about 133000 operating hours and about 400 start-ups, when the on line monitoring system revealed a progressive increase in vibrations amplitude, due to the presence of a deep crack.
Dissertation
Vibration- and Impedance-based Structural Health Monitoring Applications and Thermal Effects
TL;DR: In this article, the effects of temperature on structural health monitoring (SHM) algorithms have been investigated and the results show that temperature changes can cause many SHM algorithms to indicate damage when no damage exists.
References
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Book
The stress analysis of cracks handbook
TL;DR: The Stress Analysis of Cracks Handbook as mentioned in this paper provides a comprehensive, easy-to-access collection of elastic stress solutions for crack configurations, along with other relevant information, such as displacements, crack opening areas, basic stress functions source references, accuracy of solutions, and more.
Journal ArticleDOI
Vibration of cracked structures: A state of the art review
TL;DR: In this paper, a crack in a structural member introduces a local flexibility that affects its vibration response, and the crack will open and close in time depending on the rotation and vibration amplitude.
Journal ArticleDOI
A continuous cracked beam vibration theory
TL;DR: In this paper, a continuous cracked beam vibration theory is developed for the lateral vibration of cracked Euler-Bernoulli beams with single-edge or double-edge open cracks.
Journal ArticleDOI
On the Dynamics of Cracked Rotors: A Literature Survey
TL;DR: In this paper, a review of the field of the dynamics of cracked rotors is presented, including the modeling of the cracked part of the structure and finding different detection procedures to diagnose fracture damage.
Journal ArticleDOI
Coupled longitudinal and bending vibrations of a rotating shaft with an open crack
TL;DR: In this article, the coupling of longitudinal and bending vibrations of a rotating shaft, due to an open transverse surface crack, is investigated and the effects of unbalance and gravity are examined.