海底沟槽内管道在波流作用下水动力效应的实验研究

Experimental Study of Hydrodynamic Force Effects on Submarine Groove Pipelines Under the Action of Waves and Current

为保证海底管道在位稳定性,常采用海底预开沟将管道置于其中的方法。由于存在海底沟槽,沟槽内管道在波流的水动力作用下受到掩护效应。研究发现:在这种情况下,曳力和惯性力有很大程度的减小(折减27%～60%),升力极值也有减小(折减20%～50%);水动力折减程度还与沟槽深度和边坡构形有关。

This paper illustrates the experimental study of hydrodynamic force effects on submarine groove pipelines. On-bottom stability research of the pipelines in open trench of shelter effects,coefficients CD and CLmax are obviously related to KC number and usually they decrease with the increase of KC number and gradually reach their own steady values. The inertia force coefficient CM varies between 2 - 4.