排架式渡槽流 固耦合动力特性分析

本文分析了排架式渡槽横向流 固耦合动力特性，计算结果表明：排架式渡槽流 固耦合系统的模态可分为两类：一类为“流体振荡模态”，以流体的晃动为主，反映了流体固有晃动模态在耦合系统中的影响；另一类为“结构振荡模态”，以结构的振动为主，反映了结构固有振动模态在耦合系统中的影响。提出了两种特征值问题的计算方法，将其应用于实例计算，讨论了两种方法的优缺点。

Dynamic characteristics of fluid-structure interaction system for bent-type aqueduct

The fluid-structure interaction of the bent-type aqueducts is analyzed. The result shows that the modes of fluid-structure coupling system can be divided into two kinds. The first kind is defined as fluid-oscillation mode, in which the coupling system oscillates prominently in the fiuid-slosh form. The second kind is defined as structure-oscillation mode, in which the coupling system oscillates in the structure vibration form. These two modes of oscillation reflect the influences of natural slosh mode of fluid and natural mode of structure on the system respectively. Two computation methods for eigenvalue problem of the system are proposed. Examples for demonstration are given.