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| Random Vibration Fatigue of Thin-walled Test Piece at High Temperature |
| Received:June 30, 2019 Revised:July 12, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.08.006 |
| KeyWord:random vibration fatigue life rain-flow counting method |
| Author | Institution |
| WANG Jian |
Department of Aircraft Maintenance Engineering, Chengdu Aeronautic Polytechnic, Chengdu , China |
| SHA Yun-dong |
Liaoning Key Laboratory of Advanced Test Technology for Aeronautical Propulsion System, Shenyang Aerospace University, Shenyang , China |
| DU Ying-jie |
Department of Aircraft Maintenance Engineering, Chengdu Aeronautic Polytechnic, Chengdu , China |
| HU Yi-fei |
Liaoning Key Laboratory of Advanced Test Technology for Aeronautical Propulsion System, Shenyang Aerospace University, Shenyang , China |
| ZHANG Wei-rui |
Department of Aircraft Maintenance Engineering, Chengdu Aeronautic Polytechnic, Chengdu , China |
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| Abstract: |
| Objective To study the random vibration fatigue problem of thin-walled test piece in high temperature environment. Methods The current research status of random vibration fatigue at home and abroad was reviewed, and an effective research plan was developed. First, the dynamic response of the thin-walled test piece was calculated and analyzed by the finite element method. The fatigue life of the thin-walled test piece was estimated based on the improved rain-flow cycle counting method. Then, a random vibration fatigue test of thin-walled test piece at high temperature was conducted to obtain the dynamic response and fatigue life in the dangerous locations. Results In the high temperature and strong vibration environment, the dangerous position of the test piece mainly occurred at the boundary of fixed support or shape change. The peak of dynamic response at the fundamental frequency was the main influencing factor of the structural fatigue life. What’s more, the fatigue life of the test piece was the reduced like a parabolic line with the increase of temperature and vibration amplitude. Conclusion Through comparison of simulation and experiment, the validity and reliability of the simulation method for random vibration fatigue of thin-walled test piece in high temperature environment are verified. |
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