海洋平台桩基冲刷的数值研究  

Numerical study on scour around pile foundation of offshore platform

作　　者：郭春海[1] 杨旸[1] 陈希良[1] 张文武[1] 

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《水动力学研究与进展（A辑）》2015年第1期33-39,共7页Chinese Journal of Hydrodynamics

摘　　要：该文基于湍流与两相流理论,数值研究了海洋平台桩基冲刷的机理及其过程。分析了桩基周围的流场分布,重点讨论了圆柱扰流的压力及速度分布,并对桩基周围海床面上的泥沙随冲刷时间的变化进行分析,最后对冲刷坑的深度进行研究。研究结果表明:桩基周围的冲刷过程开始于圆柱两侧,上游先被冲断,最后下游逐渐被冲刷。The scour mechanism and scour process around the pile foundation of offshore platform are numerically studied,based on the turbulent flow theory and two phase flow theory. The distribution of flow field around the pile foundation is simulated, the pressure and velocity distribution of the disturbed flow around cylindrical obstacle are analyzed emphatically. The scour process of sediment around the pile foundation on the surface of seabed is performed with time, and the depth variation of scour pit was analyzed. The results show that the scour process around the pile foundation begins from the two sides of cylinder.The upstream is swept away first, and then the downstream is gradually eroded.

关 键 词：数值模拟 冲刷深度 两相流 流场 

分 类 号：O357.1[理学—流体力学]