水锤诱发弱约束管道流固耦合振动频谱分析

本文在充分利用现有ＭＯＣ法优点的基础上，提出一种与其十分相似的频谱分析法。该方法能解析分析水锤诱发作用下输流管道流固耦合振动的频谱特性，并能直接考虑色散和能量耗散对系统运动的影响。使用该方法能在任意激源和各种边界条件下得到管道频谱和色散曲线。文中以英国丹迪大学流体力学实验室的标准试验装置为例，说明了该方法的应用。

FREQUENCY SPECTRUM ANALYSIS OF LIQUID-FILLED PIPES UNDER WATERHAMMER-INDUCED FSI

An analytical method that is analogous to the method of characteristics (MOC) is suggested to study frequency spectrum characteristics with dispersive wave effect and dissipation energy of liquid-filled pipes. Various mechanisms of flow-stricture interaction (FSI) are taken into account in this method. This paper highlights analogies between analyses in the time and frequency domains. Analgytical solutions can be directly found in consideration of dispersive and dissipative sources by using the method suggested herein. A working example is outlined to illustrate its applications and electiveness.