Flow-induced vibrations and instabilities of structures

流动引起的振动和结构的不稳定性

基本信息

批准号：
4366-2013
负责人：
Paidoussis, Michael
金额：
$ 5.46万
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：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638656
关键词：
Flow induced vibrations instabilities structures

项目摘要

The long-term objectives of this research on flow-induced vibrations/instabilities of cylindrical structures with internal and/or external axial flow are: (i) to gain full physical understanding of the dynamical behaviour and (ii) to generate appropriate predictive theoretical models and validate them experimentally. The short-term objectives are as follows [with applications in brackets]. 1. The dynamics of cantilevered pipes and cylindrical shells discharging or aspirating fluid at their free end, with variable density and flow velocity along their length, and simultaneously subjected to confined axial flow on their exterior, via linear and nonlinear analytical/CFD models and experiments [ocean mining, LNG production, hydrocarbon storage, methane hydrate exploitation]. 2. The exploration of novel flow-path strategies to exploit the dependence of flow-induced excitation and damping on flow velocity and flow direction, either to delay/prevent flutter [applications in §1 above] or to produce near-zero damping [low-damping MEMS/nano devices].3. The use of geometric/material periodic idscontinuities and functionally graded materials to produce passive and active pipe segments, for insertion in pipelines in order to disrupt wave propagation and diminish sound transmission [filtering noise in hydraulic systems].4. The nonlinear dynamics of transversally confined cylindrical struts in axial flow and of towed cylinders, via analytical/CFD modelling and experiments [heat exchangers, nuclear reactors, offshore oil/gas exploration and production].All of this work is potentially immediately useful to the Canadian oil-and-gas, aeronautical and power- generation industries and for training HQP in these fields.

这项研究对具有内部和/或外部轴向流的圆柱结构的振动/不稳定性的研究的长期目标是：（i）为动态行为提供充分的物理理解，以及（ii）以生成适当的预测理论模型并实验验证它们。短期目标如下[括号中的应用]。 1。悬臂管道和圆柱形壳排放或有抱负的动态。几何/材料的使用周期性IDSCONTINUS和功能分级的材料可产生被动和活跃的管段，以插入管道中，以破坏波浪传播并减少声音传输[透明系统中的过滤噪声] .4。通过分析/CFD建模和实验[热交换器，核反应堆，近海油/天然气勘探和生产]，这项工作可能立即对加拿大的油气，航空和电力工业训练，这些工作可能立即有用。