25 August 2009 Test verification for improved design of rotor blade by ESPI
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Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73753T (2009) https://doi.org/10.1117/12.839268
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China
Abstract
ESPI (Electronic Speckle Pattern Interferometry) technique combined with stroboscopic laser illumination can be used to measure 3D harmonic vibration on any components and structures. It is automatically synchronized with the vibration frequency of the measured component and shows the vibration amplitude at any frequency. If the frequency is one of the resonant frequencies of the component, the vibration amplitude distribution would be a mode shape of the vibrating component. To improve the design of the rotor blade on certain type of aero-engine, ESPI measurement system was applied to measure the vibration modes of a primary blade and a modified blade. As well, the vibration response and the strain distribution of the blades were measured. Compared the test data of the primary and modified blades, the modified design can effectively move the fault modal frequency out of the original resonant region and decrease the modal response and strain distribution. The test results verified that the rotor blade design modification was effective.
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Aiping Huang, Aiping Huang, Jian Peng, Jian Peng, } "Test verification for improved design of rotor blade by ESPI", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73753T (25 August 2009); doi: 10.1117/12.839268; https://doi.org/10.1117/12.839268
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