Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method
Multicrack localization in operating rotor systems is still a challenge today. Focusing on this challenge, a new approach based on proper orthogonal decomposition (POD) is proposed for multicrack localization in rotors. A two-disc rotor-bearing system with breathing cracks is established by the fini...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2016-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2016/2375859 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832545311573147648 |
|---|---|
| author | Zhiwen Lu Dawei Dong Shancheng Cao Huajiang Ouyang Chunrong Hua |
| author_facet | Zhiwen Lu Dawei Dong Shancheng Cao Huajiang Ouyang Chunrong Hua |
| author_sort | Zhiwen Lu |
| collection | DOAJ |
| description | Multicrack localization in operating rotor systems is still a challenge today. Focusing on this challenge, a new approach based on proper orthogonal decomposition (POD) is proposed for multicrack localization in rotors. A two-disc rotor-bearing system with breathing cracks is established by the finite element method and simulated sensors are distributed along the rotor to obtain the steady-state transverse responses required by POD. Based on the discontinuities introduced in the proper orthogonal modes (POMs) at the locations of cracks, the characteristic POM (CPOM), which is sensitive to crack locations and robust to noise, is selected for cracks localization. Instead of using the CPOM directly, due to its difficulty to localize incipient cracks, damage indexes using fractal dimension (FD) and gapped smoothing method (GSM) are adopted, in order to extract the locations more efficiently. The method proposed in this work is validated to be effective for multicrack localization in rotors by numerical experiments on rotors in different crack configuration cases considering the effects of noise. In addition, the feasibility of using fewer sensors is also investigated. |
| format | Article |
| id | doaj-art-796426cc96e248c09bceea8352ac364b |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-796426cc96e248c09bceea8352ac364b2025-02-03T07:26:08ZengWileyShock and Vibration1070-96221875-92032016-01-01201610.1155/2016/23758592375859Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing MethodZhiwen Lu0Dawei Dong1Shancheng Cao2Huajiang Ouyang3Chunrong Hua4School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSchool of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSchool of Engineering, University of Liverpool, Liverpool L69 3GH, UKSchool of Engineering, University of Liverpool, Liverpool L69 3GH, UKSchool of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaMulticrack localization in operating rotor systems is still a challenge today. Focusing on this challenge, a new approach based on proper orthogonal decomposition (POD) is proposed for multicrack localization in rotors. A two-disc rotor-bearing system with breathing cracks is established by the finite element method and simulated sensors are distributed along the rotor to obtain the steady-state transverse responses required by POD. Based on the discontinuities introduced in the proper orthogonal modes (POMs) at the locations of cracks, the characteristic POM (CPOM), which is sensitive to crack locations and robust to noise, is selected for cracks localization. Instead of using the CPOM directly, due to its difficulty to localize incipient cracks, damage indexes using fractal dimension (FD) and gapped smoothing method (GSM) are adopted, in order to extract the locations more efficiently. The method proposed in this work is validated to be effective for multicrack localization in rotors by numerical experiments on rotors in different crack configuration cases considering the effects of noise. In addition, the feasibility of using fewer sensors is also investigated.http://dx.doi.org/10.1155/2016/2375859 |
| spellingShingle | Zhiwen Lu Dawei Dong Shancheng Cao Huajiang Ouyang Chunrong Hua Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method Shock and Vibration |
| title | Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method |
| title_full | Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method |
| title_fullStr | Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method |
| title_full_unstemmed | Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method |
| title_short | Multicrack Localization in Rotors Based on Proper Orthogonal Decomposition Using Fractal Dimension and Gapped Smoothing Method |
| title_sort | multicrack localization in rotors based on proper orthogonal decomposition using fractal dimension and gapped smoothing method |
| url | http://dx.doi.org/10.1155/2016/2375859 |
| work_keys_str_mv | AT zhiwenlu multicracklocalizationinrotorsbasedonproperorthogonaldecompositionusingfractaldimensionandgappedsmoothingmethod AT daweidong multicracklocalizationinrotorsbasedonproperorthogonaldecompositionusingfractaldimensionandgappedsmoothingmethod AT shanchengcao multicracklocalizationinrotorsbasedonproperorthogonaldecompositionusingfractaldimensionandgappedsmoothingmethod AT huajiangouyang multicracklocalizationinrotorsbasedonproperorthogonaldecompositionusingfractaldimensionandgappedsmoothingmethod AT chunronghua multicracklocalizationinrotorsbasedonproperorthogonaldecompositionusingfractaldimensionandgappedsmoothingmethod |