19 - Combination of vibration analysis Acoustic Emission measurements to better characterize damage and mechanical behavior of aerospace high speed gear box
Designed to break the paradigm for efficiency, the new generation of engines promises double-digit reductions in fuel burn, as well as an unparalleled single-leap improvement in emissions and lower noise to fulfil societal environmental objectives for a more sustainable future. The end-use consumer...
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| Published in | Journal of acoustic emission Vol. 35; p. S1 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Acoustic Emission Group
01.01.2018
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| Subjects | |
| Online Access | Get full text |
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| Summary: | Designed to break the paradigm for efficiency, the new generation of engines promises double-digit reductions in fuel burn, as well as an unparalleled single-leap improvement in emissions and lower noise to fulfil societal environmental objectives for a more sustainable future. The end-use consumer and environmental policy requirements for aircrafts of the next generation translate into components with higher temperature and speed. Furthermore, new instrumentation techniques are needed to closely monitor rolling contact during testing of the next generation of aero engine bearing to check its behavior under the new application condition. Vibration analysis for condition assessment and fault diagnostics is widely used nevertheless interpretation and correlation of collected data is often cumbersome. That is why combination of both techniques giving different types information in two different frequency band can help to understand the behavior of new gear box. This study proposes a correlation between low and high frequency signals with different strategy of signal acquisition and processing. Real time transient analysis with feature extraction can be done in parallel with streaming acquisition. Then pattern recognition of individual AE signal is possible and can be correlated with more traditional analysis based on "multiple chocks" vibration analysis. Continuous monitoring of an aging gear box is giving genuine information on no stationary regime and also time of stabilization. Long term experiments are conducted on damaged and defect free gear boxes at several rotating speed and loading level. Keywords: Rolling contact monitoring, vibration monitoring, EHL conditions |
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| ISSN: | 0730-0050 |