波浪作用下沉入式大圆筒结构与海床土耦合系统的动力分析  

Dynamic Finite Element Analysis on the Coupling System of Deeply Embedded Large Cylindrical Structure and Seabed Soil under Waves

作　　者：王世水[1] 唐云[1] 刘海笑[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《港工技术》2004年第3期10-12,共3页Port Engineering Technology

基　　金：国家自然科学基金资助项目 ( 5 990 90 0 5 )

摘　　要：基于大型通用有限元软件 MSC.Marc,通过二次开发成功地将土动力学中的等效线性模型和等效线性化算法引入其中 ,并对所建立的结构 -波浪 -海床耦合系统的有限元模型进行了动力计算 ,且对耦合系统中的接触面效应进行了考察。结果表明 ,等效线性模型与线弹性模型相比 ,能较好地反映土体的非线性变形特性 ,接触面的存在会增大耦合系统中结构的位移 ,且土体变形越大 ,接触面效应越明显。In this paper, the equivalent linear model and equivalent linear arithmetic in soil dynamics are introduced into the large and generally used FEM software-MSC.Marc for the first time by second development, and a model of structure-wave-seabed coupling system is analyzed by using this model and arithmetic. On the other hand, the effects of interface on the coupling system are investigated. The present results demonstrate that the equivalent linear model is better than the linear elastic model in reflecting the property of no-linear distortion of soils, and interface can increase displacement of structure, especially when soils distort obviously.

关 键 词：接触面 沉入式大圆筒 土动力学 动力分析 土体 下沉 波浪作用 等效线性模型 线弹性 耦合系统 

分 类 号：U656[交通运输工程—港口、海岸及近海工程] TU435[交通运输工程—船舶与海洋工程]