Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements
Non-contact measurement of gas turbine rotor blade vibration is a non-trivial task, with no method available which achieves this aim without some significant draw-backs. This paper presents a truly non-contact method to estimate rotor blade natural frequencies from casing vibration measurements at a...
| Main Authors: | , |
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| Format: | Journal Article |
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Academic Press
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/49668 |
| _version_ | 1848758289683185664 |
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| author | Forbes, Gareth Randall, R. |
| author_facet | Forbes, Gareth Randall, R. |
| author_sort | Forbes, Gareth |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Non-contact measurement of gas turbine rotor blade vibration is a non-trivial task, with no method available which achieves this aim without some significant draw-backs. This paper presents a truly non-contact method to estimate rotor blade natural frequencies from casing vibration measurements at a single engine operating speed. An analytical model is derived to simulate the internal casing pressure in a turbine engine including the effects of blade vibration on this pressure signal. It is shown that the internal pressure inside a turbine contains measureable information about the rotor blade natural frequencies and in-turn the casing vibration response also contains this information. The results presented herein show the residual, pressure and casing vibration, spectrum can be used to determine the rotor blade natural frequencies with validation provided for the analytical model by experimental measurements on a simplified test rig. A simulated blade fault in one of the rotor blades is introduced with successful estimation of the simulated faulty blade natural frequency. |
| first_indexed | 2025-11-14T09:41:38Z |
| format | Journal Article |
| id | curtin-20.500.11937-49668 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:41:38Z |
| publishDate | 2013 |
| publisher | Academic Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-496682019-02-19T05:35:18Z Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements Forbes, Gareth Randall, R. Blade vibration condition monitoring gas turbine casing vibration blade natural frequency Non-contact measurement of gas turbine rotor blade vibration is a non-trivial task, with no method available which achieves this aim without some significant draw-backs. This paper presents a truly non-contact method to estimate rotor blade natural frequencies from casing vibration measurements at a single engine operating speed. An analytical model is derived to simulate the internal casing pressure in a turbine engine including the effects of blade vibration on this pressure signal. It is shown that the internal pressure inside a turbine contains measureable information about the rotor blade natural frequencies and in-turn the casing vibration response also contains this information. The results presented herein show the residual, pressure and casing vibration, spectrum can be used to determine the rotor blade natural frequencies with validation provided for the analytical model by experimental measurements on a simplified test rig. A simulated blade fault in one of the rotor blades is introduced with successful estimation of the simulated faulty blade natural frequency. 2013 Journal Article http://hdl.handle.net/20.500.11937/49668 10.1016/j.ymssp.2012.11.006 Academic Press fulltext |
| spellingShingle | Blade vibration condition monitoring gas turbine casing vibration blade natural frequency Forbes, Gareth Randall, R. Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements |
| title | Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements |
| title_full | Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements |
| title_fullStr | Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements |
| title_full_unstemmed | Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements |
| title_short | Estimation of Turbine Blade Natural Frequencies from Casing Pressure and Vibration Measurements |
| title_sort | estimation of turbine blade natural frequencies from casing pressure and vibration measurements |
| topic | Blade vibration condition monitoring gas turbine casing vibration blade natural frequency |
| url | http://hdl.handle.net/20.500.11937/49668 |