长波和水流作用下浮泥流动机理研究  

Mechanism of fluid mud motion under long-wave and current

作　　者：吴博[1] 刘春嵘[1] 呼和敖德[2] 

机构地区：[1]湖南大学机械与运载工程学院工程力学系,湖南长沙410082 [2]中国科学院力学研究所,北京100190

出　　处：《海洋工程》2012年第4期62-67,共6页The Ocean Engineering

基　　金：连云港30万吨级航道工程徐圩港区航道浮泥研究资助项目;湖南大学"青年教师成长计划"资助项目

摘　　要：基于宾汉模型,并运用量级分析方法建立了长波、水流作用下浮泥运动简化方程。简化后的浮泥运动方程是一个非线性的常微分方程。运用解析与数值混合的方法进行求解,计算量很小。讨论了水流对泥面的剪应力、波幅、波长、浮泥层厚度以及浮泥密度等多组参数对浮泥输运速度的影响。研究表明,存在波浪的情况下,即使水流对泥面的剪应力远小于浮泥屈服应力浮泥也能出现定向的输运。In this paper,Bingham-Plastic model is employed to give the relation between stress and strain,and simplified equations of fluid mud motion under long wave and current are presented by order analysis.The simplified equations are non-linear ordinary differential equations which can be solved by hybrid Numerical-Analytical technique.And the computational coat is very low.The effects of the shear stress acting on the fluid mud bed,wave amplitude,wave-length,the depth of fluid mud layer and bulk density of fluid mud on the fluid mud transportation are discussed.Under the condition of wave and current coexistence,the fluid mud can move toward one direction even if the shear stress acting on the fluid mud bed is smaller than fluid mud yield stress.

关 键 词：浮泥运动 浮泥输运 宾汉模型 波流 

分 类 号：TV142[水利工程—水力学及河流动力学]