PSI - Issue 39

Nabam Teyi et al. / Procedia Structural Integrity 39 (2022) 333–346 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Al- Shudeifat, 2019

In the future, researchers may look at the backward whirl phenomenon in both undamaged and broken rotor systems. Crack diagnostics methods may be wrong if they are hampered by uncertainty, which can lead to resonance changes. It is possible that a second, more focused study be conducted to find a solution. The method can only be used on cracked rotors, hence the presence of cracks must first be verified using a fracture detection method before the suggested crack localization method be used. More measurement points are needed for better crack localization accuracy, hence sophisticated testing techniques like distributed optical fibre sensing technologies may be used.

Fu et al., 2020

Zhiwen Lu et al., 2020

Liu and Jiang, 2020

The analysis may be extended to circumferential crack cases.

Ranjan et al., 2021

In addition to residual unbalances, the system may identify other multi-harmonic errors such misalignments. AMB can identify different flaws by varying the magnetic stimulation force.

AL-Shudeifat and Alhammadi, 2021

The procedure may be explored for non Jeffcott rotor systems.

6. Conclusion A thorough examination of the crack detection, identification, localization, assessment, and prediction modelling methodologies, experiments, and analysis methods developed over the last decade has been attempted. For readability and to keep the reader’s attention, the review is organised chronologically. The long-term study, which runs from 2010 to 2021, is divided into four three-year segments. According to the study, crack analysis is a dynamic and ever changing field. Many tools, including EMD, WPT, FD, KICA, PSD, GMA, MRA, MAL, SDE, WT, and others, have been used for modelling and analysis. Each year, the work of a select few authors is constantly improved by the addition of new techniques. Over the last decade, apart from several forward modelling and inverse techniques, new algorithms such as the Multicrack Detection and Localization Algorithm (MCDLA), the Multiple Harmonic Influence Coefficient Method (MHICM), and the Uncertain Response Surrogate Function (URSF) have been developed. Traditional FE modelling is still one of the most commonly used modelling approaches for numerical analysis and experiment validation, though ANN is the preferred method for data training. The Jeffcot/de Laval rotor is still a favourite among rotor experts. This review article is written in the hope of providing a concise guide to help researchers just starting out in the field of crack analysis pick the right research objectives, as each table in the document allows for possible work extension. Acknowledgements The authors like to express their gratitude to their affiliated institute for providing the essential assistance in gaining access to journal articles for this review. Declaration of interests The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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