Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact
Cracks are common failures of aeroengine rotated blades. Online monitoring of rotated blades through their vibration to identify cracks early in various working conditions is significant for operational safety. Breathing crack is a practical form of early cracks and results in nonlinear vibration re...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/8729620 |
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| _version_ | 1832545760950878208 |
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| author | Faming Yang Yongmin Yang Haifeng Hu Fengjiao Guan Guoji Shen Suiyu Chen Zifang Bian |
| author_facet | Faming Yang Yongmin Yang Haifeng Hu Fengjiao Guan Guoji Shen Suiyu Chen Zifang Bian |
| author_sort | Faming Yang |
| collection | DOAJ |
| description | Cracks are common failures of aeroengine rotated blades. Online monitoring of rotated blades through their vibration to identify cracks early in various working conditions is significant for operational safety. Breathing crack is a practical form of early cracks and results in nonlinear vibration response. Tenon connection and shroud contact are common structures in aeroengine rotated blades, which can also lead blades to vibrate nonlinearly and seriously interfere online identification of early cracks. Thus, it is important to extract vibration features due to breathing crack considering these two structures. Firstly, a blade with tenon and shroud is simplified and a lumped parameter model of the bladed disk is built. Then, dry friction and coupling force on a blade are analyzed and dynamics equations of the lumped parameter model are established. Next, the stiffness of the blade trunk with a breathing crack is analyzed. Finally, the vibration response of blade trunks with the occurrence of breathing crack is analyzed in time and frequency domains by numerical simulation. Effective features due to breathing crack for online identification are extracted. 2x components of spectrums can be the criterion to judge whether breathing crack occurs. Besides, by comparing the changes in vibration amplitudes with 1x component peaks of spectrums, the cracked blade trunk can be distinguished. These findings can provide important theoretical guidance for online identification of early cracks in aeroengine rotated blades. |
| format | Article |
| id | doaj-art-113a64bbaddb494eb4e48fde310cb49c |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-113a64bbaddb494eb4e48fde310cb49c2025-02-03T07:24:48ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/87296208729620Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud ContactFaming Yang0Yongmin Yang1Haifeng Hu2Fengjiao Guan3Guoji Shen4Suiyu Chen5Zifang Bian6Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaScience and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaScience and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaScience and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaScience and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaScience and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaScience and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410072, ChinaCracks are common failures of aeroengine rotated blades. Online monitoring of rotated blades through their vibration to identify cracks early in various working conditions is significant for operational safety. Breathing crack is a practical form of early cracks and results in nonlinear vibration response. Tenon connection and shroud contact are common structures in aeroengine rotated blades, which can also lead blades to vibrate nonlinearly and seriously interfere online identification of early cracks. Thus, it is important to extract vibration features due to breathing crack considering these two structures. Firstly, a blade with tenon and shroud is simplified and a lumped parameter model of the bladed disk is built. Then, dry friction and coupling force on a blade are analyzed and dynamics equations of the lumped parameter model are established. Next, the stiffness of the blade trunk with a breathing crack is analyzed. Finally, the vibration response of blade trunks with the occurrence of breathing crack is analyzed in time and frequency domains by numerical simulation. Effective features due to breathing crack for online identification are extracted. 2x components of spectrums can be the criterion to judge whether breathing crack occurs. Besides, by comparing the changes in vibration amplitudes with 1x component peaks of spectrums, the cracked blade trunk can be distinguished. These findings can provide important theoretical guidance for online identification of early cracks in aeroengine rotated blades.http://dx.doi.org/10.1155/2019/8729620 |
| spellingShingle | Faming Yang Yongmin Yang Haifeng Hu Fengjiao Guan Guoji Shen Suiyu Chen Zifang Bian Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact Shock and Vibration |
| title | Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact |
| title_full | Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact |
| title_fullStr | Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact |
| title_full_unstemmed | Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact |
| title_short | Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact |
| title_sort | extraction of features due to breathing crack from vibration response of rotated blades considering tenon connection and shroud contact |
| url | http://dx.doi.org/10.1155/2019/8729620 |
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