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| Vibro-acoustic numerical analysis of thermally stressed aircraft structure |
| Received:August 20, 2010 Revised:February 16, 2011 |
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| DOI：10.7511/jslx20121018 |
| KeyWord:thermal environment vibro-acoustic coupling pre-stressed mode analysis frequency response analysis |
| Author | Institution |
| 耿谦 |
西安交通大学 航天航空学院 强度与振动教育部重点实验室, 西安 |
| 李跃明 |
西安交通大学 航天航空学院 强度与振动教育部重点实验室, 西安 |
| 杨雄伟 |
西安交通大学 航天航空学院 强度与振动教育部重点实验室, 西安 |
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| Abstract: |
| When flying at high speed,material properties,stress state and structure configuration of the aircraft will be changed under high temperature environment caused by serious aerodynamic heating.In this condition,the performance of aircraft during working period may be quite different from design performance.This paper presents a numerical research on the vibro-acoustic response of aircraft under thermal environment.The influence of thermal stress on dynamic characteristics is studied.The finite element equations which consider stress-stiffness effects are formed for vibro-acoustic dynamic analysis.Numerical results show that thermal stress has greater effect on higher order modes and influences the response peak. |