Flow-Induced Vibrations of Tube Bundles

柔性结构在受到高速流动时发生振动。在一定条件下，会产生过大的振动，并可能导致结构破坏。拟议的研究考察了由液体、气体或蒸汽流动引起的电力或化工厂热交换器管的振动。目的是了解这种现象的潜在物理原理，并开发可靠的模型，以帮助设计和评估这些结构。该项目侧重于改善热交换器性能和可靠性的应用。这些装置是电力（核能和化石燃料）和化学处理厂的重要组成部分。在核电站这些装置中，大量的能量以高压和热能的形式传输。如果这些能量的一小部分通过振动转化为机械能，这些管的完整性就会受到损害。提出的研究将有助于促进我们对导致管束结构完整性妥协的条件的理解。本研究的结果将有助于制定设计新一代设备的设计指南和规范，以及在役老化设备的分析规范。

Flexible structures vibrate when subjected to high velocity flows. Under certain conditions, excessive vibrations are produced, and structural failure may take place. The proposed research examines the vibrations of power or chemical plant heat exchanger tubes caused by liquid, gas or steam flows. The objective is to understand the underlying physics of this phenomenon and to develop reliable models that can aid in the design and the assessment of these structures. This project focuses on applications which include improving performance and reliability of heat exchangers. These devices are essential components of power (nuclear and fossil) and chemical process plants. In the case of nuclear power plants these devices, large amount of energy is transported in the form of high pressure and heat energy. If a fraction of this energy is transformed into mechanical energy through vibrations the integrity of these tube can be compromised. The proposed research will help in advancing our understanding of the conditions which lead to the compromise of the structural integrity of tube bundles. The findings of this research will aid in the development of design guidelines and codes to design new generation equipment and in the analysis codes for the in-service aging equipment.