Stability analysis of an open cracked rotor with the anisotropic rotational damping in rotating operation

Peng, Huichun; He, Qing; Zhai, Pengcheng; Zhen, Yaxin

doi:10.1016/j.apm.2017.01.003

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…To detect the nonlinear responses of the system by the fourth order Runge-Kutta method are employed and by bifurcation diagrams, power spectrums, maximum Lyapunov exponent, phase portraits and Poincaré sections are reflected [18][19][20][21][22].…”

Section: Saeed and Eissamentioning

confidence: 99%

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Stability analysis of a rotor with crack and nonlinear stiffness by perturbation method

Kim,

Ryom

2023

Preprint

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The vibration of the cracked rotor differs greatly from that of the uncracked rotor, resulting in unstable phenomena. The nonlinear stiffness of the support is distinctly appeared in a rotor which operates at the high rotating speed. The equations of motion of the Jeffcott rotor were established to reflect the effect of crack and nonlinear stiffness of the support in a cracked rotor and those first approximate solutions were found by using the perturbation method. The stability evaluation of the first approximation system shows that the greater the crack parameter, the greater the instability and the pitchfork and double bifurcations occur. The occurrence of chaotic vibrations was evaluated with Lyapunov exponent and the existence of the chaotic vibration was analyzed with the fractal dimension in the rotor with the crack and the nonlinear stiffness.

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Section: Saeed and Eissamentioning

confidence: 99%

“…Peng H. C. et al [1] analyzed by perturbation method the stability of rotor with open crack and studied the damping effects with the distinction of stationary damping and the anisotropic rotating damping on the dynamic stability of the rotating rotor with an open crack.…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of a rotor with crack and nonlinear stiffness by perturbation method

Kim,

Ryom

2023

Preprint

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“…The most common methods to detect damage for structure of devices in the operation are dynamic methods using measured vibration data including the frequency measurements, mode shapes analysis, and other analysis of dynamic responses altered by the damage. 3–5 These researches mainly focus on the development of dynamic model to simulate the actual crack of structure or system 6–8 and acquire the modal parameters or vibration signatures with high precision which means the methods of signal processing. 9,10 But the sizes of the damage that can be detected by dynamic methods are relatively large compared with the detection of ultrasonic guided waves.…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack detection under the vibration condition based on ultrasonic guided waves

Zhu

Bao

2019

Structural Health Monitoring

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Ultrasonic guided wave is an encouraging tool in structural health monitoring for civil, mechanical, ship, and aerospace devices. Most of heavy devices required a long-time running during the service, and the structure of these devices is under the vibration condition due to their inherent properties and working condition. This article mainly researches fatigue crack detection in vibration condition caused by operation using ultrasonic guided waves, aiming to study the application of ultrasonic guided waves in the field of structure dynamics. The detection method based on the difference index and the sequence curve of difference index between different states of crack is proposed to detect fatigue crack in vibration condition. The experiments are carried out on the fatigue testing platform and the vibration test-bed to investigate the relationship between opening states of fatigue crack and the difference index value of ultrasonic guided waves. In order to reduce the influence of loads applied by the fatigue testing platform on ultrasonic guided waves propagation, the initial experiment is first carried out to select the range of applied loads which have minimal influence on wave propagation. The results show that loads from 0 to 24 MPa have minimal effect on ultrasonic guided waves, and the difference index values of intact beam and cracked beam are in different orders of magnitude. Therefore, the method based on difference index value and sequence of difference index is credible to detect fatigue crack for structure in vibration condition.

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A Baseline-Free Damage Detection Method for Operation Structure Based on Nonlinear Ultrasonic Guided Waves

Zhu

2020

Advances in Asset Management and Condition Monitoring

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Stability analysis of an open cracked rotor with the anisotropic rotational damping in rotating operation

Cited by 11 publications

References 20 publications

Stability analysis of a rotor with crack and nonlinear stiffness by perturbation method

Stability analysis of a rotor with crack and nonlinear stiffness by perturbation method

Fatigue crack detection under the vibration condition based on ultrasonic guided waves

A Baseline-Free Damage Detection Method for Operation Structure Based on Nonlinear Ultrasonic Guided Waves

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