Flow-induced vibration and instabilities of structures

建议的工作包括基础研究和应用研究。它是对细长结构与轴流相互作用的动力学研究的结合，将结构和流动的更现实和复杂的方面结合起来，考虑了结构的非线性以及流体非线性和非比例阻尼。本研究的主要目标是发展一项研究，以突破性的实验创新来解决开放性问题。理论，数值研究和解决不同领域的问题（如航空航天，核工程，能源系统和生物力学）用一个共同的方法。特别是，目的是提供新的见解的非线性振动和颤振分析的主题，壳型结构受到可压缩和不可压缩流动。本研究将集中在此类系统的非线性振动、流固耦合、动态稳定性和振动主动控制等方面，在航空航天、原子能工业和生物力学等领域有广泛的应用。本研究与发电工业、海上机械和航空工业相关，并具有重要意义；这项研究的一些组成部分是长期基础研究的主题。在实际应用方面，本研究涉及热交换器、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、声学拖缆和拖曳式水下航行器、溶液开采和海洋应用、呼吸和血液动力学系统等。***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，以及最先进的仪器设备，包括激光多普勒测振仪、LMS模态分析系统和大型水洞进行了室内实验，研究了壳型结构的非线性振动。这些研究导致了大量科学论文的发表，这些调查的结果被IREQ、Spar航空航天/EMS技术、CAE电子、NRC航空航天研究所的结构、材料和推进小组、庞巴迪和普华永道等公司用于不同的工业部门。这些研究产生了增强的数学模型和数值模拟包，通过实验调查（在我们先进的流固相互作用实验室进行）验证，描述了耦合流固系统的动态行为。这项工作的结果已经在国际会议上发表，并在国际期刊上发表

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.**