联体式渡槽流固耦合动力特性分析

基于势流体假设建立渡槽——水流固耦合二维联体式渡槽模型，分别计算比较刚性地基约束情况和考虑桩土作用的弹性地基约束情况的渡槽结构在不同水深工况下的计算结果，分析了联体式渡槽的动力特性以及土一桩结构相互作用对上部结构动力特性的影响。计算结果表明：槽内水体使结构自振频率降低，并且随着水深的加大频率降低越多；考虑桩一土相互作用使渡槽结构变柔，自振周期变长，因此在渡槽的静动力计算分析中有必要考虑桩土作用。

Dynamic Characteristic Analysis for Combined Aqueduct with Fluid-solid Coupling

Based on the potential fluid assumption to build two-dimensional combined aqueduct model with fluid-solid coupling,the results of rigid foundation model and elastic foundation model are calculated and compared so as to analysis the dynamic characteristics of combined aqueduct and the effect on the upper structure when considering the pile-soil interaction.The results show that the coupling reaction between the aqueduct and water would reduce the free vibration frequency of the structure,and the reducing value would raised with water depth increasing;In the static and dynamic analysis of aqueduct,the pile-soil interaction should be considered because it could make the structure become soft and the natural period become prolonged.