Vibration response analysis of a cracked rotating compressor blade during run-up process

Zeng, Jin; Chen, Kangkang; Ma, Hui; Duan, Tiantang; Wen, Bangchun

doi:10.1016/j.ymssp.2018.09.008

Cited by 77 publications

(21 citation statements)

References 65 publications

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“…The FEM in combination of the HBM is usually adopted to solve the steady dynamic responses of rotor systems with cracks [9]. A finite element model is constructed for a cracked rotating compressor blade by Zeng et al [10]. Guo et al [11] carried out experimental studies on the crack detection of a Jeffcott rotor, which proved the effectiveness of the EMD based method.…”

Section: Introductionmentioning

confidence: 99%

Dynamics analysis of a hollow-shaft rotor system with an open crack under model uncertainties

Yang

et al. 2020

Communications in Nonlinear Science and Numerical Simulation

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This paper focuses on the vibration behaviors of a hollow-shaft rotor in presence of an open crack under inherent uncertainties. Non-probabilistic interval variables are used to represent the uncertain parameters, which releases the high demands of probabilistic knowledge in traditional methods. In modeling the shaft, local stiffness matrix of the cracked element is derived by using the neutral axis method. The periodic response of the rotor system is solved by combination of the finite element method (FEM) and the harmonic balance method (HBM). A simple mathematical function, termed as the uncertain response surrogate function (URSF), is constructed to estimate the vibration response in various cases where different parametric uncertainties are taken into consideration. To verify the robustness and accuracy of the URSF, the bounds of estimated response are compared with those obtained from the classical methods. Results show that the surrogate function has good accuracy and robustness, providing an effective method and guidance for diagnosing crack in uncertain context.

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Section: Introductionmentioning

confidence: 99%

Dynamics analysis of a hollow-shaft rotor system with an open crack under model uncertainties

Yang

et al. 2020

Communications in Nonlinear Science and Numerical Simulation

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“…Especially, the effect of blade crack on the vibrations for the whole engine system is pretty weak, so it is difficult to capture the feature information of blade crack directly from the casing vibration responses, which makes it very tough for blade health monitoring. Conventional investigations are mainly focused the nonlinear vibration of single blades [48][49][50] or the free vibration of RSDB system [22,28,34], while only few of them are dedicated to the study on the steady-state coupling vibration analysis for the RSDB system with blade crack [45]. This section is intended for the coupling vibration mechanism analysis of the RSDB system with blade crack through numerical study with the proposed dynamic model.…”

Section: Coupling Vibration Analysismentioning

confidence: 99%

Steady-state coupling vibration analysis of shaft–disk–blade system with blade crack

Yang

Mao

et al. 2021

Nonlinear Dyn

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Rotating shaft-disk-blade (RSDB) system is one of the most important parts of turbomachinery, such as aero-engine, gas turbine and power plant. The coupling vibration of RSDB system with blade crack is vital for the blade health monitoring and crack detection of rotating blade. This study aims at addressing the dynamic modeling and steady-state coupling vibration mechanism of RSDB system with blade crack. First and foremost, on the basis of the stress state at crack section, an improved analytical breathing crack model (modified stress-based breathing crack model, MSBCM) for rotating blade is proposed. The validity of the proposed breathing crack model is verified by comparing the results obtained by MSBCM, finite element contact crack model and conventional analytical crack models. The comparative results suggest that MSBCM is of high fidelity and behaves best among the analytical crack models. Subsequently, a comprehensive dynamic model of the coupling vibration for RSDB system with blade crack is formulated on the basis of continuum

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“…Crack occurs owing to stress concentration, excessive load and fatigue. In general assortment, crack model is divided into two classes: the first is open crack with assumption that crack remains open during vibration and the second is breathing crack that assumes crack in beam opened and closed frequently during vibration [1][2][3][4][5]. If the static deflection due to some loading components on the beam such as dead loads and own weight is larger than the vibration amplitudes, then the crack remains open all the time and the open crack model could be considered.…”

Section: Introductionmentioning

confidence: 99%

Explicit formula to estimate natural frequencies of a double-beam system with crack

Mirzabeigy

Madoliat

Surace

2019

J Braz. Soc. Mech. Sci. Eng.

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In the present study, an analytical formula to estimate natural frequencies of a simply supported double-beam system in the presence of open crack is derived. Euler-Bernoulli hypothesis was applied to beams, and Winkler model was used for inner layer. Material properties and cross section geometry of beams could be arbitrary and different from each other. To obtain natural frequencies, Eigenvalue problem solving finally yields an algebraic equation which must be solved numerically and does not show effects of different damage parameters in the explicit form. In this regard, Rayleigh method was applied to derive explicit formulation for natural frequencies. In the case of crack occurrence, the mode shapes of intact beam were modified by adding cubic polynomial functions to represent crack effect. The unknown coefficients of polynomial functions were calculated by using boundary conditions of the system and compatibility conditions at the crack section. Using the obtained admissible functions and Rayleigh method, an explicit formulation was achieved for natural frequencies. The problem one more time was solved using the differential transform method to approve the accuracy of the analytical formulation for the cracked double-beam system. Comparison of analytical and numerical results indicates good accuracy of derived formulation for natural frequencies of the cracked double-beam system.

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Vibration response analysis of a cracked rotating compressor blade during run-up process

Cited by 77 publications

References 65 publications

Dynamics analysis of a hollow-shaft rotor system with an open crack under model uncertainties

Dynamics analysis of a hollow-shaft rotor system with an open crack under model uncertainties

Steady-state coupling vibration analysis of shaft–disk–blade system with blade crack

Explicit formula to estimate natural frequencies of a double-beam system with crack

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