Determining Rotor Blade Multi-Mode Vibration Components
The new algorithm presented in this paper determines the multi-mode blade vibration components when the time of blade arrival is known from an experiment. The validation of the algorithm is presented in a numerical simulation, which assumes the blade vibration parameters. This shows the accuracy of...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
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| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/15/9/4883 |
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| Summary: | The new algorithm presented in this paper determines the multi-mode blade vibration components when the time of blade arrival is known from an experiment. The validation of the algorithm is presented in a numerical simulation, which assumes the blade vibration parameters. This shows the accuracy of the calculated vibration velocity amplitude and phase, as well as the good agreement between the calculated and assumed velocities. The accuracy of the calculations increased with the number of rotations up to N = 50. Therefore, N = 50 was used in further calculations. SO-3 engine 1st-stage compressor rotor blades were analyzed for the nominal 15,000 rpm and the non-nominal 12,130 rpm regimes using the proposed Least Squares algorithm over the tip-timing method/data collection/procedure. The 1st-stage compressor rotor blades of SO-3 engine were analyzed using tip-timing and the Least Squares algorithm for nominal 15,000 rpm and non-nominal 12,130 rpm. Two sensors in the casing and a once-per-revolution sensor below were used. The rotor blade was found to vibrate predominantly with one-mode shapes, but the second mode was also visible |
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| ISSN: | 2076-3417 |