Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition
The crack-induced changes in the vertical transient response of a rotating shaft–disc system, Jeffcott rotor, are investigated for transverse crack detection. The crack is considered as a breathing crack. A novel breathing function is proposed, in which the partially open–closed crack breathing beha...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
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| Series: | Vibration |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2571-631X/5/3/23 |
| _version_ | 1827655937726349312 |
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| author | Hamid Khorrami Ramin Sedaghati Subhash Rakheja |
| author_facet | Hamid Khorrami Ramin Sedaghati Subhash Rakheja |
| author_sort | Hamid Khorrami |
| collection | DOAJ |
| description | The crack-induced changes in the vertical transient response of a rotating shaft–disc system, Jeffcott rotor, are investigated for transverse crack detection. The crack is considered as a breathing crack. A novel breathing function is proposed, in which the partially open–closed crack breathing behavior is interpolated between the fully open and closed crack behaviors. The breathing crack excites superharmonic response components of the transient as well as the subharmonic components. A Hilbert–Huang transform based on an improved empirical mode decomposition algorithm is subsequently formulated to evaluate the time–frequency representation of the vertical transient response of the rotor to detect the crack. The results show that the proposed breathing function can effectively reduce the computational effort without sacrificing the accuracy of the crack breathing behavior in the presence of small cracks. It is shown that time–frequency representations based on an improved empirical mode decomposition algorithm can lead to the detection of smaller cracks compared with those based on the empirical mode decomposition algorithm. |
| first_indexed | 2024-03-09T22:15:35Z |
| format | Article |
| id | doaj.art-af8925a6c8d9462daf5b91630d8c5629 |
| institution | Directory Open Access Journal |
| issn | 2571-631X |
| language | English |
| last_indexed | 2024-03-09T22:15:35Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Vibration |
| spelling | doaj.art-af8925a6c8d9462daf5b91630d8c56292023-11-23T19:24:38ZengMDPI AGVibration2571-631X2022-07-015340842810.3390/vibration5030023Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode DecompositionHamid Khorrami0Ramin Sedaghati1Subhash Rakheja2Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montréal, QC H3G 1M8, CanadaDepartment of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montréal, QC H3G 1M8, CanadaDepartment of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montréal, QC H3G 1M8, CanadaThe crack-induced changes in the vertical transient response of a rotating shaft–disc system, Jeffcott rotor, are investigated for transverse crack detection. The crack is considered as a breathing crack. A novel breathing function is proposed, in which the partially open–closed crack breathing behavior is interpolated between the fully open and closed crack behaviors. The breathing crack excites superharmonic response components of the transient as well as the subharmonic components. A Hilbert–Huang transform based on an improved empirical mode decomposition algorithm is subsequently formulated to evaluate the time–frequency representation of the vertical transient response of the rotor to detect the crack. The results show that the proposed breathing function can effectively reduce the computational effort without sacrificing the accuracy of the crack breathing behavior in the presence of small cracks. It is shown that time–frequency representations based on an improved empirical mode decomposition algorithm can lead to the detection of smaller cracks compared with those based on the empirical mode decomposition algorithm.https://www.mdpi.com/2571-631X/5/3/23transient responseJeffcott rotorbreathing crackempirical mode decomposition |
| spellingShingle | Hamid Khorrami Ramin Sedaghati Subhash Rakheja Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition Vibration transient response Jeffcott rotor breathing crack empirical mode decomposition |
| title | Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition |
| title_full | Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition |
| title_fullStr | Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition |
| title_full_unstemmed | Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition |
| title_short | Vertical Transient Response Analysis of a Cracked Jeffcott Rotor Based on Improved Empirical Mode Decomposition |
| title_sort | vertical transient response analysis of a cracked jeffcott rotor based on improved empirical mode decomposition |
| topic | transient response Jeffcott rotor breathing crack empirical mode decomposition |
| url | https://www.mdpi.com/2571-631X/5/3/23 |
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