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Journal articles on the topic 'MULTI CRACKED ROTOR'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Parhi, Dayal R., and Adik R. Yadao. "Analysis of dynamic behavior of multi-cracked cantilever rotor in viscous medium." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 230, no. 4 (2016): 416–25. http://dx.doi.org/10.1177/1464419315618033.

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The present investigation is an attempt to evaluate the dynamic behaviours of multi-cracked cantilever rotor shaft with an additional mass attached at the tip of the shaft, which is partially submerged in the viscous fluid. In this work, theoretical expressions are developed to find the fundamental natural frequency and amplitude of the multi-cracked rotor shaft with attached mass, using influence coefficient method. Navier–Stoke’s equations are used for the analysis of external fluid forces acting on the rotor. Viscosities of the fluid and relative crack locations are taken as main variable p

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2

Zheng, Zhaoli, Yonghui Xie, Di Zhang, and Fahui Zhu. "Numerical investigation on the nonlinear dynamics of a breathing cracked rotor supported by flexible bearings." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 19-20 (2019): 6815–26. http://dx.doi.org/10.1177/0954406219866473.

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The steady-state response and breathing mechanism of a cracked rotor supported by flexible bearings are investigated in this paper. The generalized and efficient method proposed in this paper can be used to study the dynamics of complicated cracked structures without much modification. First, a three-dimensional finite element model of the cracked rotor-bearing system is established in the rotating frame and a general contact model for modeling the breathing crack is proposed. A component mode synthesis is used to form a reduced-order model. Then, a procedure combining multi-harmonic balance m

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3

Yu, Tao, Ying Yang, Qing Kai Han, Hong Liang Yao, and Bang Chun Wen. "ANN-Based Crack Identification in Rotor System with Multi-Crack in Shaft." Key Engineering Materials 353-358 (September 2007): 2463–66. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2463.

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Rotating machinery, such as steam turbo, compressor, and aeroengine etc., are widely used in many industrial fields. Among the important rotor faults, the fatigue crack fault, which can lead to catastrophic failure and cause injuries and severe damage to machinery if undetected in its early stages, is most difficult to detect efficiently with traditional methods. In the paper, based on the truth of the change of the mode shapes of the cracked structure, a new method by combining accurate finite element model of rotor with multi-crack in shaft and artificial neural network (ANN) is proposed to

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4

Banaszek, Slawomir. "Dynamics of Large Power Rotating Machine with Cracked Shaft." Key Engineering Materials 293-294 (September 2005): 337–46. http://dx.doi.org/10.4028/www.scientific.net/kem.293-294.337.

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The paper presents the course and results of crack propagation simulation research. The object taken into account is a large power turbo-set rotor. The computer code system NLDW is presented. It uses a non-linear model of journal bearings, and well known crack model. Crack depth is marked by a crack coefficient. It is shown the crack generates a coupled forms of lateral, axial and torsional vibrations in multi-support rotor. Their intensity depends on the axial and circumferential crack location on the shaft. The attempt at pointing a proper diagnostic indicator for crack detection in large ro

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5

Dau, Anh Tuan, Ionel Nistor, and Adinel Gavrus. "Numerical Analysis Concerning the Harmfulness of Crack Turbine Rotors Using a Multi-Scale Approach Based on a Dynamic Finite Element Method." Applied Mechanics and Materials 656 (October 2014): 315–24. http://dx.doi.org/10.4028/www.scientific.net/amm.656.315.

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This work is placed in the context of the simulation of the behavior and the harmfulness of cracked rotors by Electricité de France (EDF) in order to evaluate its impact on the industrial system. Several numerical tools have been developed by the Research and Development Division of EDF and a feasibility study was conducted to prove its capacities to simulate the behavior of a rotor subject to a crack. Since the industrial context request fast response to such situation, the numerical simulation must be performed as quickly as possible. For this reason a multi-scale 1D-3D modeling has been pr

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6

Li, Xue Jun, K. Wang, Ling Li Jiang, and T. Zhang. "Rotor Crack Detection Based on Multi-Vibration Signal Fusion Collected from the Basement of Machinery Using SVM and Statistical Characteristics Methodology." Applied Mechanics and Materials 34-35 (October 2010): 1000–1004. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1000.

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As the poor generability of special sensor support frame and the inconvenience of signal acquisition in the process of common fault diagnosis for cracked rotor, a new fault diagnosis method is presented in this paper. this method takes the basement of rotor test rig as the monitoring objects and makes feature fusion for time-domain statistics of multiple sensors using SVM (support vector machine). The result of experiment showed that the method using the multi-sensor signal fusion technology collected from the basement of machinery has the advantages of better diagnostic precision for rotor cr

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7

Kulesza, Zbigniew. "Harmonic Balance Analysis for the Rigid Finite Element Model of the Rotating Cracked Shaft." Solid State Phenomena 199 (March 2013): 99–104. http://dx.doi.org/10.4028/www.scientific.net/ssp.199.99.

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The paper presents a multi-dimensional harmonic balance analysis utilized to study the vibration responses of the cracked rotor subject to gravity, unbalance and an additional lateral harmonic force generated by an active magnetic bearing. The nonlinear terms resulting from the shaft crack are included via an alternating frequency/time domain (AFT) method. The example addressed in this paper is a simple rotor modeled by using the rigid finite element (RFE) approach. Combination frequencies are recognized as evident symptoms of the shaft crack.

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8

Jadhav, P. V., R. A. Barawade, S. V. Patil, Y. B. Mohite, and V. R. Patil. "An Experimental and Numerical Investigation on Static Vibration Response of Multi-Cracked Rotor Shaft." IOP Conference Series: Materials Science and Engineering 377 (June 2018): 012041. http://dx.doi.org/10.1088/1757-899x/377/1/012041.

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9

El-Mongy, Heba H., and Younes K. Younes. "Vibration analysis of a multi-fault transient rotor passing through sub-critical resonances." Journal of Vibration and Control 24, no. 14 (2017): 2986–3009. http://dx.doi.org/10.1177/1077546317697828.

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Various faults may simultaneously occur in a rotor dynamic system. It is crucial to detect and monitor these faults to ensure the safe operation of machinery. Usually, vibration response is utilized for fault diagnosis; however, the identification process becomes more challenging when multiple faults exhibit similar symptoms in the vibration response. In this paper, the vibrational transient response of a cracked rotor is analyzed in the presence of unbalance and coupling misalignment. The study focuses on investigating the possibility, advantages and limitations of using the sub-critical star

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10

Xiong, Libo, Chunrong Hua, Funing Yang, Dawei Dong, and Huajiang Ouyang. "Dynamic Characteristics Analysis of a Coupled Multi-crack Rotor System." Journal of Physics: Conference Series 2184, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1742-6596/2184/1/012040.

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Abstract This paper establishes a coupled model for multi-crack rotor using Timoshenko beam element with six degrees of freedom, and derives the stiffness matrix in the equations of motion accounting for the coupling between multiple cracks (the interaction between cracks). Then the effects of crack orientation angles (the relative angle between cracks, γ) on dynamic characteristics of the coupled multi- crack rotor near 1/3 and 1/2 subcritical speeds are analysed. The coupling between cracks induces more complex nonlinear dynamic characteristics such as large magnitudes of the super-harmonic

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11

Yu, Guo-Fei, Yi-Jui Chiu, Chia-Hao Yang, Jing Sheng, and Xiao-Yun Li. "Exploration of coupled-vibration phenomena in multi-disk rotor with blades with multi-cracks." Advances in Mechanical Engineering 11, no. 4 (2019): 168781401983739. http://dx.doi.org/10.1177/1687814019837398.

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12

Liu, Yuan Feng, and Mei Zhao. "Detection of Rotor Cracks Based on Multi-Scale Singular Spectrum Analysis." Key Engineering Materials 245-246 (July 2003): 273–78. http://dx.doi.org/10.4028/www.scientific.net/kem.245-246.273.

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13

Zhao. "IDENTIFICATION OF MULTI-CRACKS IN THE GATE ROTOR SHAFT BASED ON THE WAVELET FINITE ELEMENT METHOD." American Journal of Engineering and Applied Sciences 6, no. 3 (2013): 309–19. http://dx.doi.org/10.3844/ajeassp.2013.309.319.

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14

Zhang, Hongyuan, Shuo Li, and Hongyun Sun. "Study on the Vibration Characteristics of the Helical Gear-Rotor-Bearing Coupling System of a Wind Turbine with Composite Faults." Mathematics 12, no. 9 (2024): 1410. http://dx.doi.org/10.3390/math12091410.

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As the core component of the wind turbine generation gearbox, the gear-rotor-bearing transmission system typically operates in harsh environments, inevitably leading to the occurrence of composite faults in the system, which exacerbates system vibration. Therefore, it is necessary to study the vibration characteristics of wind turbine helical gear-rotor-bearing transmission systems with composite faults. This paper uses an improved energy method to calculate the theoretical time-varying mesh stiffness of a helical gear with a root crack failure. On the premise of considering the time-varying m

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15

Vashisht, Rajiv Kumar, and Qingjin Peng. "Simultaneous Fault Detection and Multivariable Adaptive Hybrid Control for Unbalanced Vibrations of Cracked Flexible Rotor Systems." Journal of Dynamic Systems, Measurement, and Control 142, no. 12 (2020). http://dx.doi.org/10.1115/1.4047818.

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Abstract For the reduction of unbalanced vibrations in a multi-input and multi-output flexible rotor system with electromagnetic actuators (EAs), conventional adaptive feedforward controllers (AFFCs) are very sensitive for changes in rotor spin frequencies. Although frequency updating is used in these controllers, a small variation in the rotor spin frequency can completely reduce their effectiveness. An adaptive notch filter is used in this research for the frequency estimation. By using this external frequency estimation, the performance of the conventional AFFCs can be enhanced. During chan

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16

Nima, Rezazadeh, and Fallahy Shila. "Crack classification in rotor-bearing system by means of wavelet transform and deep learning methods: an experimental investigation." December 11, 2020. https://doi.org/10.21595/jmeacs.2020.21799.

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Parallel with significant growth in industry, especially mysteries related to energy engineering, condition monitoring of rotating systems have been experiencing a noticeable increase. One of the prevalent faults in these systems is fatigue crack, so finding reliable procedures in identification of cracks in rotating shafts has become a pressing problem among engineers during recent decades. While a vast majority of cracked rotors can operate for a specific period of time, to prevent catastrophic failures, crack detection and measuring its characteristics (i.e. size and its location) seem to b

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17

Pan, Chuang, Yuande Dai, and Yaocheng Li. "Simulation study of crack parameters’ effects on the vibration characteristics of a bladed disk system." Journal of Vibroengineering, August 1, 2023. http://dx.doi.org/10.21595/jve.2023.23337.

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As a key component of the turbo machine rotor in harsh operating conditions, high cycle fatigue failure and even cracks are common in bladed disks. In this paper, modal analysis was carried out for a single cracked bladed disk system, the effects of crack depth, crack height and rotating speed on its vibration characteristics were studied by the method of both numerical simulation and orthogonal test, and the effects of crack distribution on the vibration characteristics of multi-crack bladed disk systems were also studied. Finally, some conclusions have been drawn, they provide a fundamental

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18

Ranjan, Gyan, Rajiv Tiwari, and H. B. Nemade. "Fault identification in cracked rotor-AMB system using magnetic excitations based on multi harmonic influence coefficient method." Inverse Problems in Science and Engineering, July 17, 2021, 1–31. http://dx.doi.org/10.1080/17415977.2021.1952409.

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19

Hua, Chunrong, Libo Xiong, Lumei Lv, Dawei Dong, and Huajiang Ouyang. "Multi-fault classification of rotor systems based on phase feature of axis trajectory in noisy environments." Structural Health Monitoring, June 16, 2023. http://dx.doi.org/10.1177/14759217231178652.

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As it is difficult to distinguish multiple rotor faults with similar dynamic phenomena in noisy environments, a multi-fault classification method is proposed by combining the extracted trajectory phase feature, a parameter-optimized variational mode decomposition (VMD) method and a light gradient boosting machine (LightGBM) model. The trajectory phase feature is extracted from an axis trajectory by fusing the frequency, amplitude, and phase information related to rotor motion and can comprehensively describe the dynamic characteristics induced by different rotor faults. First, the vibration di

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20

Zhao, NA. "IDENTIFICATION OF MULTI-CRACKS IN THE GATE ROTOR SHAFT BASED ON THE WAVELET FINITE ELEMENT METHOD." December 31, 2013. https://doi.org/10.3844/ajeassp.2013.309.319.

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21

Zhu, Chenyang, Long Ma, Yuguo Zhou, Zhongming Dong, Hong Cao, and Deguang Liu. "Abnormal detection method of hydro-turbine generator based on vision transformer." Intelligent Decision Technologies, July 11, 2025. https://doi.org/10.1177/18724981251356644.

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At present, the stator and rotor components of hydro-turbine generators operate under complex electromagnetic and mechanical stress environments for extended periods, making them prone to micro-cracks, insulation aging, local overheating, or structural wear. Traditional detection methods are not accurate enough in identifying such minor faults. To improve the accuracy and stability of anomaly detection, this paper proposed a stator and rotor surface anomaly recognition method based on Vision Transformer (ViT), which used its self-attention (SA) mechanism to extract long-distance dependencies i

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22

Gajjar, Mrugesh, Christian Amann, and Kai Kadau. "High-Performance Computing Probabilistic Fracture Mechanics Implementation for Gas Turbine Rotor Disks On Distributed Architectures Including Graphics Processing Units (GPUS)." Journal of Engineering for Gas Turbines and Power, August 10, 2021. http://dx.doi.org/10.1115/1.4052078.

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Abstract We present an efficient Monte Carlo (MC) based probabilistic fracture mechanics simulation implementation on heterogeneous high-performance (HPC) architectures including CPUs and GPUs for large heavy-duty gas turbine rotor components for the energy sector. A reliable probabilistic risk quantification requires simulating millions to billions of MC samples. We apply a modified Runge-Kutta algorithm to solve numerically the fatigue crack growth for this large number of cracks for varying initial crack sizes, locations, material and service conditions. This compute intensive simulation wa

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