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| Test Technologies for High Temperature Vibration Characteristics and Turbine Blade |
| Received:June 25, 2018 Revised:September 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.09.012 |
| KeyWord:turbine blade thermal vibration test modal analysis finite element |
| Author | Institution |
| GAO Xiang |
AVIC Aircraft Strength Research Institute, Xi'an , China |
| YAN Qun |
AVIC Aircraft Strength Research Institute, Xi'an , China |
| HANG Chao |
AVIC Aircraft Strength Research Institute, Xi'an , China |
| YOU Yu |
AVIC Aircraft Strength Research Institute, Xi'an , China |
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| Abstract: |
| Objective To acquire characteristics of mode of turbine blade at actual operating temperature and explore technologies for high temperature modal test. Methods A blade thermal vibration characteristics test was carried on by combining virtual experiment with physical experiment. The temperature field distribution of the turbine blade were got through virtual thermal test based on ABAQUS based finite element analysis. The nature vibration characteristics of the turbine blade with temperature field distribution were calculated by tenon contacting conditions according to actual clamping state. The blade thermal vibration experiment system was established by combining electromagnetic vibration table with radiant heating system. Meanwhile, the blade was impacted and excited by a high frequency electromagnetic vibration generator system. Then the blade vibration parameter characteristics were obtained through testing the speed distribution of blade with a laser vibration sensor. Results After comparison of two test results, there were some difference between the analysis results and the test results, which were within the allowable range. Conclusion The test methods could provide scientific basis for test of blade vibration characteristics and was of great effective guidance for study on blade fatigue. |
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