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.

气动弹性是工程学中的一个多学科领域，研究空气动力、惯性和弹力之间的相互作用。气动弹性现象是飞机结构不稳定问题的潜在根源。这些现象最重要的方面是机翼的发散振动，称为扑动。最近的研究表明，现代飞机上存在相当多的潜在非线性行为源，非线性可以显着影响飞机结构的气动弹性特性。该研究计划的主要目标是寻求持续的支持，以开展飞机结构颤振的分析和预防研究，并在瑞尔森大学新成立的航空航天工程系成立气动弹性研究小组。这将确保大学对研究生进行培训，以满足对气动弹性专业知识的需求。在过去的几年中，申请人一直在考虑非线性的情况下研究飞机机翼的气动弹性行为。还研究了防止此类系统气动弹性不稳定性的方法。在本研究提案中，这些调查将得到加强和完成。在申请人的 NSERC 资助的过去几年中，还探索了使用非线性信号分析方法来识别气动弹性不稳定性。该方法取得了非常令人鼓舞的结果，并将在本研究提案中进一步改进。