项目名称: 波浪水流联合作用下粉土海床液化和泥沙运动耦合动力过程
项目编号: No.51479182
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 其他
项目作者: 董平
作者单位: 中国海洋大学
项目金额: 84万元
中文摘要: 本项目针对近海工程设施稳定的设计要求,以认识浪流作用下粉土海床液化机理和伴随的泥沙运动为目标,通过物理模型试验、理论分析和数值模型相结合的方法,研究波流联合作用下粉土海床的液化过程及其与近底泥沙运动的耦合关系,并在此基础上建立一个泥沙动力分析方法和传统土力学方法相结合的多相流模型。着重克服常用的弹性土体液化分析方法的局限性,为精细描述水土边界的复杂物理过程开辟一个新的有效途径。此外,在理论分析和试验验证的基础上,通过系统地数值计算,生成一套便于工程应用的粉土海床液化分析图表,从而保证本项目的研究成果既有较高的理论水平又有明显的工程实际应用价值。
中文关键词: 粉土;液化;波流联合;物理模型;数值模型
英文摘要: The proposed research aims at understanding the dynamic processes involved in the liquefaction and transport of silty sediments under the combined action of waves and currents and building advanced engineering tools for designing coastal structures on liquefiable seabed. Using the combined experimental, theoretical and numerical approach, the research will investigate the coupling relationship between liquefaction and near-bed sediment movement and develop a two-phase flow modelling framework that combines the sediment dynamics and conventional soil mechanics methods. Through systematic parametric analysis and verification against the measurements the developed model will be used to generate design tables/charts that may be directly applied to engineering design so as to ensure the quality as well as the practical value of the research.
英文关键词: Silty;Liquefaction;Combined wave current;Phisical model;Numerical model