دورية أكاديمية
An improved analytical dynamic model for rotating blade crack: With application to crack detection indicator analysis
| العنوان: | An improved analytical dynamic model for rotating blade crack: With application to crack detection indicator analysis |
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| المؤلفون: | Laihao Yang, Meng Ma, Shuming Wu, Xuefeng Chen, Ruqiang Yan, Zhu Mao |
| المصدر: | Journal of Low Frequency Noise, Vibration and Active Control, Vol 40 (2021) |
| بيانات النشر: | SAGE Publishing, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Acoustics. Sound |
| مصطلحات موضوعية: | Control engineering systems. Automatic machinery (General), TJ212-225, Acoustics. Sound, QC221-246 |
| الوصف: | Rotating blade is one of the most important components for turbomachinery. Blade crack is one of the most common and dangerous failure modes for rotating blade. Therefore, the fault mechanism and feature extraction of blade crack are vital for the safety assurance of turbomachinery. This study is aimed at the nonlinear dynamic model of rotating blade with transverse crack and the prior feature extraction of blade crack faults based on the vibration responses. First and foremost, a high-fidelity breathing crack model (HFBCM) for rotating blade is proposed on the basis of criterion for stress states at crack section. Since HFBCM is physically deduced from the perspective of energy dissipation and the coupling between centrifugal stress and bending stress is considered, the physical interpretability and the accuracy of the crack model are enhanced comparing with conventional models. The validity of the proposed HFBCM is verified through the comparison study among HFBCM, conventional crack models, and finite element-based contact crack model (FECCM). It is suggested that HFBCM behaves best among the analytical models and matches well with FECCM. With the proposed HFBCM, the nonlinear vibration responses are investigated, and four types of blade crack detection indicators for rotating blade and their quantification method are presented. The numerical study manifests that all these indicators can well characterize the occurrence and severity of crack faults for rotating blade. It is indicated that these indicators can serve as the crack-monitoring indexes. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1461-3484 2048-4046 14613484 |
| Relation: | https://doaj.org/toc/1461-3484; https://doaj.org/toc/2048-4046 |
| DOI: | 10.1177/14613484211012602 |
| URL الوصول: | https://doaj.org/article/922eb3bf119949549a7a2fdf8310f94e |
| رقم الأكسشن: | edsdoj.922eb3bf119949549a7a2fdf8310f94e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 14613484 20484046 |
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| DOI: | 10.1177/14613484211012602 |