| 浅谈飞行器与桥梁的颤振问题 |
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| 引用本文： | 余秋阳, 尹亚鹏. 浅谈飞行器与桥梁的颤振问题. 力学与实践, 2023, 45(4): 721-727. doi: 10.6052/1000-0879-22-663 |
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| 作者姓名： | 余秋阳 尹亚鹏 |
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| 作者单位： | *. 清华大学航天航空学院，北京 100084; †. 中南大学土木工程学院，长沙 410075 |
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| 基金项目： | 中国空气动力研究与发展中心旋翼空气动力学重点实验室研究开放课题(RAL202204-9)资助。 |
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| 摘 要： | 颤振属于气动弹性动不稳定现象，常见于飞行器机翼和尾翼、桥梁等弹性结构，一旦发生，可能会引发结构的毁灭性破坏。本文首先介绍颤振的基本概念和特征，以及工程领域中常用的颤振研究方法，以展弦比为16的NACA0012弹性平直机翼为例介绍颤振速度和颤振频率；然后对结构发生颤振的原因进行讨论，并详细阐述基于流动降阶模型的稳定性分析方法在层流分离颤振诱发机理研究中的应用；最后对防止和规避颤振的控制措施进行介绍。
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| 关 键 词： | 颤振 飞行器 桥梁 |
| 收稿时间： | 2022-11-30 |
| 修稿时间： | 2023-02-15 |
DISCUSSION ON FLUTTER OF AIRCRAFT AND BRIDGE |
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| Yu Qiuyang, Yin Yapeng. Discussion on flutter of aircraft and bridge. Mechanics in Engineering, 2023, 45(4): 721-727. doi: 10.6052/1000-0879-22-663 |
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| Authors: | YU Qiuyang YIN Yapeng |
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| Affiliation: | *. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China; †. School of Civil Engineering, Central South University, Changsha 410075, China |
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| Abstract: | Flutter is a kind of aeroelastic dynamic instability phenomenon, which is common in aircraft wings, tails, bridges and other elastic structures. Once flutter occurs, it will cause destructive damage to the structure. This paper first introduces the basic concepts and characteristics of flutter, as well as the commonly used flutter research methods in the engineering field. Taking the NACA0012 elastic straight wing with aspect ratio of 16 as an example, the flutter velocity and flutter frequency are introduced. Then the causes of structural flutter are discussed, and the application of stability analysis method based on reduced-order model in the mechanism study of laminar separation flutter is described in detail. Finally, the control measures to prevent and avoid flutter are introduced. |
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| Keywords: | flutter aircraft bridge |
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