海底管线冲刷悬空是诱发管道涡激振动破坏的一个主要原因。为更好地对管线冲刷悬空情况进行评估,本文应用水动力-泥沙冲刷耦合模型,对往复潮流作用淤泥质海床海底管线局部冲刷过程进行了模拟研究,模型采用标准k-ε紊流方程对N-S方程进行封闭,控制方程采用有限差分法进行离散,模拟结果表明,双向潮流作用下,管道局部冲刷轮廓基本呈现对称状态,其最大冲刷深度位置因水流流速的转向而有所摆动,往复流引起的冲刷深度较恒定流情况减小约20%左右。 Submarine pipeline scouring is a major cause of vortex induced vibration vandalism. In order to better evaluate the situation of pipeline scouring and vacating, this paper uses the coupled model of hydrodynamic-sediment flushing to simulate the local scour process of the seabed pipeline with reciprocating tidal current. The standard k-ε turbulence equation The governing equations are discretized by the finite difference method. The simulation results show that under the action of bidirectional tidal current, the local scouring profile of the pipeline shows a symmetrical state basically. The position of the maximum scour depth swings due to the turning of the water flow velocity. The reciprocating flow The scouring depth is about 20% lower than the constant flow.