Relevant bibliographies by topics / MULTI CRACKED ROTOR

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'MULTI CRACKED ROTOR'

Author: Grafiati
Published: 11 September 2023
Last updated: 31 July 2025

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Journal articles on the topic "MULTI CRACKED ROTOR"

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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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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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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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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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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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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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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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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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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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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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Dissertations / Theses on the topic "MULTI CRACKED ROTOR"

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JAIN, ANUJ KUMAR. "DYNAMIC ANALYSIS OF MULTI CRACKED ROTOR THROUGH EXTENDED LAGRANGIAN MECHANICS." Thesis, 2018. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16490.

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The initiation of fatigue cracks or other defects in structures or machines or their elements cause a reduction in stiffness and also change the dynamic characteristics of the machine. Dynamic analysis of cracked rotor is an emerging area of research due to its practical importance and several issues are associated with this analysis due to its complexity and increasing demand of reliable crack detection techniques. It has been found in archival literature that various crack detection methodologies have been used to analyze the dynamic behaviour of a cracked rotor. The vibration pr
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S, Bala Murugan. "Finite element analysis of multi-disk rotor-bearing system with transverse crack." Thesis, 2015. http://ethesis.nitrkl.ac.in/6647/1/THESIS-_BALA_MURUGAN_S_ROLL_NO._612ME310.pdf.

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The vibration analysis of rotating systems is pronounced as a key function in all the fields of engineering. The behavior of the rotor systems are mainly resulting from the excitations from its rotating elements. There are several numerical methods present to analyze the rotor-bearing systems. Finite element method is a key tool for dynamic analysis of rotor bearing system. The current study describes a multi disk, variable cross section rotor-bearing system with transverse crack on xisymmetric elements supported on bearings in a fixed frame. The shaft in the rotor-bearing system is assumed t
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Book chapters on the topic "MULTI CRACKED ROTOR"

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Singh, S. K., R. Tiwari, and S. Talukdar. "A Multi-Crack Identification Algorithm Based on Forced Vibrations from a Shaft System." In IUTAM Symposium on Emerging Trends in Rotor Dynamics. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0020-8_42.

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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." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.2463.

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Zhao, Daiyao, Jingnan Han, Xianggang Liu, Zhouchang Zuo, and Kexun Zheng. "Exploration of the Application of Fine Reconstruction of Unmanned Aerial Vehicles in Landslide Disaster Investigation and Management." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_40.

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AbstractThe mountainous terrain in the southwest region is characterized by significant topographic relief and abundant rainfall. When constructing new energy infrastructure such as booster stations in mountainous areas, it is extremely easy to induce landslide instability due to the excavation of mountain slopes. This article takes the Wangmo landslide in the southwestern region of Guizhou Province as the research object, uses multi-rotor drones as platforms, and utilizes techniques such as ground-based photogrammetry and close-range photogrammetry to detect and obtain relevant parameters suc
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Conference papers on the topic "MULTI CRACKED ROTOR"

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Inoue, Tsuyoshi, Toshihiro Yamamichi, Masato Kato, and Yukio Ishida. "Vibration Analysis and Detection of Rotor Crack in a Multi-Disk Rotor System by Periodic Excitation Using AMB." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34639.

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Operating of rotating machinery with a rotor crack is a risk condition, since the rotor crack grows gradually and may fail causing a catastrophic accident. Therefore, it is very important to detect the occurrence of a crack on rotating machinery in early stages. The authors have used the simple two-degree-of-freedom cracked rotor model, and investigated the usage of periodic excitation for the detection of the rotor crack. This paper constructs a finite element rotor model with breathing crack element, and performs the numerical investigation. The dynamic responses of a cracked rotor system un
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Han, Bing, Peigang Yan, Zhansheng Liu, and Peng He. "Interference of Unbalance on the Dynamic Characteristics of Cracked Rotor: An Experimental Research." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-100836.

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Abstract When the rotor of an aeroengine or gas turbine contains cracks, it produces abnormal vibrations. The abnormal vibration behavior of the cracked rotor can be used as the basis for crack fault diagnosis. However, in practice, the rotor itself cannot achieve absolute dynamic balance. Also, the operating environment in which the rotor is placed may contain unbalanced excitation. During the rotation of the cracked rotor, the existence of unbalance interferes with these abnormal vibration characteristics. Therefore, studying this process is of great significance for solving the issue of rot
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Maleki, Yavar Keshtkar, Mir Saeed Safizadeh, Mehrdad Nouri Khajavi, Gholamhasan Payganeh, and Safura Shuruni. "Over hang slant cracked rotor vibration signal processing based on discrete wavelet transform." In 2016 13th International Multi-Conference on Systems, Signals & Devices (SSD). IEEE, 2016. http://dx.doi.org/10.1109/ssd.2016.7473655.

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Adewusi, S. A., and B. O. Al-Bedoor. "Detection of Propagating Cracks in Rotors Using Neural Networks." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1518.

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This paper presents the application of neural networks for rotor cracks detection. The basic working principles of neural networks are presented. Experimental vibration signals of rotors with and without a propagating crack were used to train the Multi-layer Feed-forward Neural Networks using back-propagation algorithm. The trained neural networks were tested with other set of vibration data. A simple two-layer feed-forward neural network with two neurons in the input layer and one neuron in the output layer trained with the signals of a cracked rotor and a normal rotor without a crack was fou
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Han, Qinkai, and Fulei Chu. "Unbalanced Response of Cracked Rotor-Bearing System Under Time-Dependent Base Movements." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62637.

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Unbalanced response of cracked rotor-bearing system under time-dependent base movements is studied in this paper. Three base angular motions, including the rolling, pitching and yawing motions, are assumed to be sinusoidal perturbations superimposed upon constant terms. Both the open and breathing transverse cracks are considered in the analysis. The finite element model is established for the base excited rotor-bearing system with open or breathing cracks. Considering the time-varying base movements and transverse cracks, the second order differential equations of the system will not only hav
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Chandrasekaran, Shravankumar, and Rajiv Tiwari. "Model-Based Crack Identification Using Full-Spectrum." In ASME 2013 Gas Turbine India Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gtindia2013-3756.

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This paper illustrates the application of full-spectrum technique for model-based identification of the crack and unbalance multi-fault parameters in cracked rotor systems. The rotor model chosen is a Laval rotor with disc unbalance and transverse surface crack. The crack force model is a switching crack, which has harmonic components exciting the rotor both in the same and reverse directions of the rotor spin. Development of identification algorithm uses linearized equations of motion in frequency domain. Full-spectrum obtains the complex Fourier coefficients of the force as well as the respo
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Jing, Jian Ping, and Guang Meng. "A New Method for Multi-Fault Diagnosis of Rotor System." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84178.

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A Blind Source Separation (BSS) based new method for multi-fault diagnosis of rotors is presented. The statistic variable based decorrelation approach is employed to analyze the signals of the rotors with crack and rub-impact, crack and oil-whirl multi-faults, the typical features of the frequency spectrum of each fault of the rotor are separated out. The separated results show that (1) the BSS technique is helpful to the multi-fault diagnosis of a rotor system. (2) Due to the signals in the same direction at different locations of a rotor is correlative in some extent, if the observed points
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DENG, WEIKUN, KHANH T. P. NGUYEN, CHRISTIAN GOGU, JEROME MORIO, and KAMAL MEDJAHER. "A FEW-SHOT LEARNING FRAMEWORK FOR ROTOR UNBALANCE AND SHAFT CRACK FAULT DIAGNOSTIC BASED ON PHYSICS-INFORMED NEURAL NETWORK." In Structural Health Monitoring 2023. Destech Publications, Inc., 2023. http://dx.doi.org/10.12783/shm2023/36985.

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This study aims to detect and localize rotor unbalance and shaft crack damage in a few-shot data scenario. It proposes a reinforcement learning-based approach with physics preferences (called RLP2). RLP2 is used to guide the physics consistency in the rotor finite element mimetic neural network (RFEMNN). The RFEMNN is first trained in an unsupervised manner using mixed simulation and experimental datasets in the task of reconstructing rotor’s vibration signals. Then, the RFEMNN is fine-tuned in the RLP2 framework using a physics preference reward as policy loss to ensure similarity between hid
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Vashisht, Rajiv Kumar. "Model Based Determination of Size and Location of a Crack in a Rotor System Using Wavelet Transformation and Pattern Search Optimization." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97072.

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Abstract Real rotor with multiple disks, ball bearings and flexible bearing supports has been considered in the present work. Reduced order model required for simulations of the dynamic system is developed using multi-objective genetic algorithms by matching its dynamic response with full order Finite Element Method based model. This enables us the possibility of including ball bearing dynamics as well as experimental data in model updating. In a rotating machinery, multiple types of faults can be expected during its service life, such as transverse breathing crack, looseness of bearing suppor
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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)." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-59295.

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