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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760259
• 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.

拟议的工作涉及基础研究和应用研究。它是对细长结构与轴向流相互作用的动力学研究的结合，通过将结构和流的更现实和复杂的方面整合在一起，其中考虑了结构的非线性方面以及流体非线性和非比例阻尼。 本研究的主要目标是开发一项研究，通过实验中的突破性创新来解决开放性问题。理论和数值研究，并以共同的方法解决不同领域的问题（例如航空航天，核工程，能源系统和生物力学）。特别是，其目的是提供新的见解的可压缩和不可压缩流的壳型结构的非线性振动和颤振分析的主题。本研究将侧重于非线性振动，流体-结构相互作用，动态稳定性，以及此类系统经历大幅振动的主动振动控制，并应用于航空航天和原子能工业以及生物力学。这项研究与发电工业、海洋机械和航空工业有关，并对其感兴趣;研究的某些组成部分是长期基础研究的主题。在实际应用方面，这项研究涉及热交换器，飞机发动机和机身动力学，石油和天然气工业中的制冷剂，核反应堆和蒸汽发生器，阀门，管道，声拖缆和拖曳式水下航行器，溶液采矿和海洋应用，呼吸和血液动力系统，仅举几例。研究进展近年来，我们的团队通过先进的数值技术和分析工具，以及最先进的仪器，包括激光多普勒测振仪，LMS模态分析系统和大型水洞的实验室实验，研究了壳型结构的非线性振动。这些研究导致了许多科学文章的出版，这些调查的结果被用于不同的工业部门和公司，如IREQ，Spar Aerospace/EMS Technologies，CAE Electronics，NRC航空航天研究所的结构，材料和推进小组，庞巴迪和PWC。这些研究产生了增强的数学模型和数值模拟包验证实验研究（在我们先进的流体-结构相互作用实验室进行）描述耦合的流体-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，并发表在国际期刊上。