| Autor: |
Wayne C. Haase, Michael J. Drumm |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Proceedings, IEEE Aerospace Conference. |
| DOI: |
10.1109/aero.2002.1036151 |
| Popis: |
The purpose of this effort was to develop a system to detect, discriminate and track fatigue cracks in rotating disks. Aimed primarily at jet engines in flight applications, the system also has value for detecting cracks in a spin pit during low cycle fatigue testing, and for monitoring the health of steam turbines and land-based gas turbine engines for maintenance purposes. The results of this effort produced: a physics-based model that describes the change in the center of mass of a rotating disk using damping ratio, initial unbalance and crack size as parameters; the development of a data acquisition and analysis system that can detect and discriminate a crack using a single cycle of data; and initial validation of the model through testing in a spin pit. The development of the physics-based model also pointed to the most likely regimes for crack detection; identified specific powers of /spl omega/ to search for in specific regimes; dictated a particular type of data acquisition for crack discrimination; and demonstrated a need for a higher signal-to-noise ratio in the measurement of the basic vibration signal. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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