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| Thermal-vibration Characteristics of Complex Combustor Structure |
| Received:July 15, 2015 Revised:December 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2015.06.022 |
| KeyWord:combustor thermal environment vibration characteristics |
| Author | Institution |
| SHAO Kang |
State Key Laboratory for Strength and Vibration of Mechanical Structures，Xi′an Jiaotong University，Xi′an ，China |
| ZHANG Jing-jing |
State Key Laboratory for Strength and Vibration of Mechanical Structures，Xi′an Jiaotong University，Xi′an ，China |
| DONG Long-lei |
State Key Laboratory for Strength and Vibration of Mechanical Structures，Xi′an Jiaotong University，Xi′an ，China |
| YAN Gui-rong |
State Key Laboratory for Strength and Vibration of Mechanical Structures，Xi′an Jiaotong University，Xi′an ，China |
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| Abstract: |
| Objective To improve the safety and stability of the complex aircraft structure in the process of service. Methods Taking the engine combustor of complex aircraft as example, the changing patterns of dynamic parameters along with temperature under different working conditions were investigated numerically and experimentally. Results The results indicated that the modal frequency decreased and the mode damping first raised then fell and finally raised again with the increase of temperature, and heating had no influence on the mode shape of the structure. Conclusion For a free-free configuration combustor, the main cause of decrease in the modal frequency was the change of elastic modulus and the influence of thermal stress and geometric nonlinearity could be ignored in hot environment. Moreover, by conducting the thermal modal test on a free-free configuration combustor, the correctness of the numerical simulation method was verified. |
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