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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。
Based on the theory of turbulent flow and two-phase flow, the mechanism and process of offshore platform pile scouring are numerically studied. The distribution of flow field around the pile foundation is analyzed. The pressure and velocity distribution of the cylindrical spoiler are discussed in detail. The variation of sediment with time on the sea floor around the pile foundation is analyzed. Finally, the depth of scouring pit . The results show that the process of scouring around pile foundation begins on both sides of the cylinder, the upstream is first punched, and finally the downstream is gradually washed away.