多孔介质海床对波浪传播影响理论分析  

Dynamic analysis for effects of porous seabed on wave propagation

作　　者：王忠涛[1,2] 栾茂田[1,2] 郑东生[3] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学土木水利学院岩土工程研究所,辽宁大连116024 [3]邓迪大学土木工程学院

出　　处：《大连理工大学学报》2009年第6期891-896,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金青年基金资助项目(50909014);国家自然科学基金资助项目(重点项目50639010);南京水利水电科学研究院开放流动基金资助项目(Yk90507);大连理工大学青年教师培养基金资助项目(2006)

摘　　要：假定海床为刚性、不透水边界的传统波浪理论难以模拟多孔介质海床对波浪传播的消能影响.基于完全动力响应模式,建立了能够考虑波浪-海床相互作用的波散方程,通过变动海床厚度、海洋土渗透系数和饱和度及波浪角频率,采用复波数解析方法,围绕量纲一参量波长比和能量衰减因子进行数值计算和参量分析,结果表明波浪在传播过程中会受到海床不同程度的消能作用,表现为波幅衰减及对应的波长变化.Conventional ocean wave theories are based on an assumption of a rigid impermeable seabed, which are difficult to simulate the effects of porous seabed on wave propagation. The major intention is to establish modified wave dispersion equation which can consider the interaction of wave and seabed on the basis of dynamic analysis by employing the complex wave number. Analytical solutions of two non-dimensional parameters of wave length ratio and energy factor are given for comparative studies in different situations of seabed thickness, soil permeability, degree of saturation and wave circle frequency. The results show that wave profile will be attenuated and wave length will be changed subjected to the effects of porous seabed.

关 键 词：波散方程 海床 相互作用 动力分析 

分 类 号：TU432[建筑科学—岩土工程]