Nonlinear analysis and prevention of wings flutter

机翼扑振的非线性分析与防治

• 批准号: 227749-2006
• 负责人: Alighanbari, Hekmat
• 金额: $ 1.24万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=361217
• 关键词: Nonlinear; analysis; prevention; wings; flutter

Aeroelasticity is a multi-disciplinary field in engineering that studies the interaction among aerodynamic, inertia and elastic forces. Aeroelastic phenomena are a potential source of instability problem for aircraft structures. The most important aspect of these phenomena is divergent oscillation of wings known as flutter. Recent investigations have shown that there are a considerable number of potential sources of nonlinear behaviour on modern aircraft, and nonlinearities can significantly influence the aeroelastic characteristics of aircraft structure. The main objective of this research proposal is to seek continued support to carry on research in analysis and prevention of flutter in aircraft structures, and to initiate an aeroelasticity research group in the new Department of Aerospace Engineering at Ryerson University. This will ensure university training of graduate students to meet the demand for expertise in aeroelasticity. During the past several years, the applicant has been studying aeroelastic behaviour of aircraft wings taking into account nonlinearties. Methods of preventing aeroelastic instabilities for such systems have also been investigated. In this research proposal, these investigations will be enhanced and completed. The use of nonlinear signal analysis methods to identify aeroelastic instabilities has also been explored in the past few years of the applicant's NSERC grant. This method gave very encouraging results, and it will be further improved in this research proposal.

航空弹性是工程学中的一个多学科领域，研究了空气动力学，惯性和弹性力之间的相互作用。航空弹性现象是飞机结构的潜在不稳定性问题的根源。这些现象的最重要方面是翅膀的振荡，称为颤动。最近的调查表明，现代飞机上有大量非线性行为的潜在来源，非线性可以显着影响飞机结构的航空弹性特征。这项研究建议的主要目的是寻求持续支持，以进行飞机结构的分析和预防扑动的研究，并在瑞尔森大学新航空航天工程系中启动一个航空弹性研究小组。这将确保对研究生的大学培训，以满足对航空弹性专业知识的需求。在过去的几年中，申请人一直在研究飞机翅膀的航空弹性行为，并考虑到非行为。还研究了预防此类系统的航空弹性不稳定性的方法。在这项研究建议中，这些调查将得到增强和完成。在申请人的NSERC赠款的过去几年中，还探索了非线性信号分析方法识别航空弹性不稳定性的方法。这种方法给出了非常令人鼓舞的结果，这项研究建议将进一步改善。