The dynamics of a rotor system with a shaft having a slant crack. A qualitative analysis using a simple rotor model.

Ichimonji, Masayuki; Watanabe, Satoshi

doi:10.1299/jsmec1988.31.712

Cited by 18 publications

(21 citation statements)

References 1 publication

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“…[14,15] have found that parametric excitation leads to multi-frequency response even the outer excitation is neglected. In the dynamic analysis of a rotor system considering a slant crack in the shaft [16], the frequency spectrum of the steady state response of the cracked rotor was found to have sub-harmonic frequency components at an interval frequency, matching well with the findings in [17]. Deolasi et.al.…”

Section: Introductionsupporting

confidence: 79%

Spectral properties for the vibrational response of parametrically excited system

Han

Wang

2009

Arch Appl Mech

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The response spectra are helpful to understand the vibrational characteristics of linear system, and further could be used as important indications for the failure diagnosis and state detecting of the system. Due to the parametric excitation, the vibrational spectra of linear periodic system differ distinctly from that of the linear time-invariant system. Thus, utilizing the Sylvester's theorem and Fourier series approximations, commonly used in the matrix decomposition, the spectral components for both the free and forced responses of linear parametrically excited system are obtained theoretically in the first part of the paper. The effects of system stability and damping on the response spectra are discussed in detail. Moreover, the external resonant condition for periodic system is found in the analysis. In the following part of the paper, spectral simulations for a spur gear pair under idle load (modeled as the free response) and fluctuating load (modeled as forced response) are done respectively to validate the theoretical results and illustrate the special frequency distributing features of periodic system intuitively.

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Section: Introductionsupporting

confidence: 79%

Spectral properties for the vibrational response of parametrically excited system

Han

Wang

2009

Arch Appl Mech

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“…Ichimonji and Watanabe [114] investigated a transverse vibration response of the rotor with a slant crack, assuming that the slant crack opens and closes synchronously with torsional excitation frequency. Based on the assumption that the bending stiffness of the shaft changes synchronously with the opening/closing behaviour of the crack caused by the torsional vibration of the shaft, it was shown that the steady-state response of a rotor system with a slant crack on its shaft, induced by imbalance, contains the frequencies represented by Ω m,n ¼mΩ þnΩ tr /2 (m ¼1, 2,…, and n ¼0, 1, 2,…).…”

Section: Additional Excitation Of a Cracked Rotormentioning

confidence: 99%

Non-linearities in the vibrations of elastic structures with a closing crack: A state of the art review

Bovsunovsky

Surace

2015

Mechanical Systems and Signal Processing

154

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“…However, the identification of crack type and the angle between two cracks were not attract enough attention until now. The types of crack on a rotating shaft reported in literatures were usually transverse, slant [4][5] and helicoidal [6]. Occasionally, there are multiple cracks [7][8] exist on a rotating shaft, moreover, various combinations of crack type, position and depth have the identification decidedly more complex.…”

Section: Introductionmentioning

confidence: 99%

Research on Identification of the Crack on Rotor Shaft

Hu¹,

Guo²,

Song³

et al. 2016

Proceedings of the 2016 3rd International Conference on Materials Engineering, Manufacturing Technology and Control

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Abstract:In the present research the crack identification in rotor systems is proposed based on Holospectrum. The purpose of the research is to detect not only the crack location on a rotor shaft, but also the crack type and the angle between two cracks on a rotor shaft. 3D Holospectrum is introduced to detect crack location on the shaft, and the 2D Holospectrum to detect the crack type and angle between two cracks. The proposed technique was validated through numerical simulations on the rotor system with a two cracks.

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The dynamics of a rotor system with a shaft having a slant crack. A qualitative analysis using a simple rotor model.

Cited by 18 publications

References 1 publication

Spectral properties for the vibrational response of parametrically excited system

Spectral properties for the vibrational response of parametrically excited system

Non-linearities in the vibrations of elastic structures with a closing crack: A state of the art review

Research on Identification of the Crack on Rotor Shaft

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