Flow-induced vibration and instabilities of structures

流动引起的振动和结构的不稳定性

• 批准号: RGPIN-2018-06465
• 负责人: Paidoussis, Michael
• 金额: $ 4.56万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=714258
• 关键词: Flow; induced; vibration; instabilities; structures

SUMMARY The proposed work involves both fundamental and applied research. It is a combination of research on the dynamics of slender structures interacting with axial flow, by integrating therein more realistic and complex aspects of structure and flow, in which nonlinear aspects of the structures as well as fluid nonlinearity and non-proportional damping are considered. The main goal of this research is to develop a study addressing open problems with ground-breaking innovations in experimental. theoretical, and numerical investigations and to tackle the problems of different areas (e.g. aerospace and aeronautics, nuclear engineering, energy systems, and biomechanics) with a common approach. In particular, the aim is to provide new insights on the subject of nonlinear vibrations and flutter analysis of shell-type structures subjected to compressible and incompressible flow. This research will focus on nonlinear vibrations, fluid-structure interaction, dynamic stability, and active vibration control of such systems undergoing large amplitude vibrations, with applications in aerospace and atomic energy industries and biomechanics. This research is related and is of interest to the power generating industry, offshore mechanics, and the aeronautical industry; some components of the research are the subject of longer-term fundamental investigations. In terms of practical applications, this research is related to heat exchangers, aircraft engines and fuselage dynamics, risers in the oil and gas industry, nuclear reactors and steam generators, valves, piping, acoustic streamers and towed underwater vehicles, solution mining and ocean applications, the respiratory and haemodynamic systems, to name but a few. PROGRESS OF RESEARCH In recent years, our team has studied nonlinear vibrations of shell-type structures by means of advanced numerical techniques and analytical tools, as well as laboratory experiments with the most advanced instrumentation, including laser Doppler vibrometers, the LMS modal analysis system, and a large water tunnel. These studies led to the publication of numerous scientific articles, and the findings of these investigations were used in different sectors of industry and by companies such as IREQ, Spar Aerospace/EMS Technologies, CAE Electronics, the NRC aerospace research institute's structures, materials and propulsion group, Bombardier and PWC. These studies produced enhanced mathematical models and numerical simulation packages validated by experimental investigations (carried out in our advanced fluid-structure interactions laboratory) describing the dynamic behaviour of coupled fluid-structure systems. The results of this work have been presented at international conferences and published in international journals.

总结拟议的工作涉及基础研究和应用研究。它是对纤细结构与轴向流相互作用的动力学的研究，通过整合其中的结构和流动的更现实和复杂的方面，其中结构的非线性方面以及流体的非线性和非比例阻尼。 这项研究的主要目的是开发一项研究，该研究解决了实验中开创性创新的开放问题。理论和数值研究，并以一种共同的方法解决不同地区（例如航空航天和航空，核工程，能源系统和生物力学）的问题。特别是，目的是提供有关非线性振动主题的新见解以及对经受可压缩和不可压缩流的壳型结构的扑动分析。这项研究将集中于非线性振动，流体结构相互作用，动态稳定性以及经历大幅度振动的系统的主动振动控制，并在航空航天和原子能产业和生物力学中应用。这项研究与发电行业，海上力学和航空行业有关，并引起人们的关注。研究的某些组成部分是长期基本研究的主题。在实际应用方面，这项研究与热交换器，飞机发动机和机身动态，石油和天然气行业的起诉，核反应堆和蒸汽发生器，阀门，管道，声流，声流和拖曳的水下车辆，解决方案挖掘和海洋应用，呼吸和呼吸道和造型动力学系统，仅举几例。 近年来，研究的进展，我们的团队通过先进的数值技术和分析工具研究了壳型结构的非线性振动，以及具有最先进仪器的实验室实验，包括激光多普勒振动仪，LMS模态分析系统，以及大型水隧道。这些研究导致发表了许多科学文章，这些研究的结果用于行业的不同部门，以及IREQ，SPAR Aerospace/EMS Technologies，CAE Electronics，NRC Aerospace Research Institute的结构，材料和推进小组，Bombardier和PWC等公司。这些研究产生了通过实验研究验证的增强的数学模型和数值模拟包（在我们的高级流体结构相互作用实验室中进行的），描述了耦合流体结构系统的动态行为。这项工作的结果已在国际会议上提出，并在国际期刊上发表。