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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=691152
• 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.**

摘要拟议的工作涉及基础研究和应用研究。它结合了细长结构与轴向流相互作用的动力学研究，通过整合结构和流动的更现实和更复杂的方面，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。 这项研究的主要目标是开展一项研究，通过突破性的实验创新来解决开放问题。理论和数值研究，并以通用方法解决不同领域（例如航空航天、核工程、能源系统和生物力学）的问题。特别是，其目的是为可压缩和不可压缩流动的壳型结构的非线性振动和颤振分析提供新的见解。该研究将重点关注此类经历大幅振动的系统的非线性振动、流固耦合、动态稳定性和主动振动控制，并在航空航天、原子能工业和生物力学中得到应用。这项研究与发电行业、海上机械和航空工业相关，并且引起人们的兴趣；该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立管、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、呼吸和血液动力学系统等等。 ***研究进展 近年来，我们的团队利用先进的数值技术和分析工具，以及使用最先进仪器（包括激光多普勒测振仪、LMS模态分析系统和大型水洞）进行的实验室实验，研究了壳型结构的非线性振动。这些研究导致发表了大量科学文章，这些调查结果被不同的工业部门和公司使用，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、庞巴迪和普华永道。这些研究产生了增强的数学模型和数值模拟包，并通过实验研究（在我们先进的流固耦合实验室进行）验证，描述了耦合流固系统的动态行为。这项工作的成果已在国际会议上发表并在国际期刊上发表。**