流-固耦合作用下斜坡式防波堤地震动力响应分析  

DYNAMIC SEISMIC RESPONSE OF A RUBBLE-MOUND BREAKWATER WITH FLUID-STRUCTURE INTERACTION

作　　者：杨勋[1,2] 王欢欢[1,2] 余克勤[3] 金先龙[1,2] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]上海交通大学机械与动力工程学院,上海200240 [3]上海核工程研究设计院,上海200233

出　　处：《工程力学》2016年第10期248-256,共9页Engineering Mechanics

基　　金：国家高技术研究发展计划863重大项目(2012AA01A307);国家自然科学基金项目(51475287)

摘　　要：针对地震过程中海水-防波堤-地基的耦合效应,结合某沿海斜坡式防波堤,建立了海水-防波堤-地基系统有限元模型,应用任意拉格朗日欧拉方法以及显式动态有限元方法,对真实地震过程中的防波堤系统动力响应进行了仿真,给出了流-固耦合作用下,不同地震激励的防波堤残余变形以及地震过程中的动水压力时程。研究结果表明:考虑流-固耦合作用对防波堤残余变形响应有较显著影响,且水平向残余变形受影响程度大于竖直向残余变形;地震过程中的动水压力主要受海水主频以及地震激励卓越频率的影响。研究结果可为防波堤设计、安全评价和抗震措施研究提供了理论基础。The purpose of this paper is to understand the dynamic response of rubble-mound breakwater with seawater-breakwater-foundation interaction after a real earthquake shock. This study employs the Arbitrary Lagrangian Eulerian approach and dynamic finite element method, in which the seawater and the foundation of rubble-mound breakwater are considered; then the dynamic response of rubble-mound breakwater during earthquake is simulated. It is found that the seawater-breakwater-foundation interaction does have considerable effect on residual displacements of the rubble-mound breakwater. The difference in horizontal residual displacement due to the effect of seawater-breakwater interaction is greater than that of vertical residual displacement. The vertical component of earthquake has a considerable effect on the hydrodynamic pressure on breakwater face. According to the results presented in this study, it is necessary to consider the effect of interaction for rubble-mound breakwaters seismic safety evaluation. The present research provides some guidance for the seismic design of rubble-mound breakwater.

关 键 词：海岸和近海工程 防波堤 地震响应 流-固耦合 任意拉格朗日欧拉方法 

分 类 号：TU435[建筑科学—岩土工程]