Analysis of the influence of water entry velocity on the suction anchor lowering operation in the splash zone

被引：0
|
作者：
Zan Y. [1 ]
Guo R. [1 ]
Han D. [1 ]
Huang F. [2 ]
Luo C. [2 ]
Jia H. [1 ,3 ]
机构：
[1] College of Shipbuilding Engineering, Harbin Engineering University, Harbin
[2] Offshore Oil Engineering Co., Ltd, Tianjin
[3] Harbin Marine Equipment Co., Ltd, Harbin
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2021年 / 42卷 / 08期
关键词：
Coefficient of cable tension; Dynamic effect; Floating dynamic amplification factor; Lifting operation; Lowering velocity; Numerical analysis; Splash zone; Suction anchor;
D O I：
10.11990/jheu.202007122
中图分类号：
学科分类号：
摘要：
The dynamics of suction anchors during the lifting operation over a splash zone are investigated, sling tension and structure motion in an irregular wave are analyzed using the Reynolds-Averaged Navier-Stokes equation, and the volume of fluid method is used to solve the multiphase flow. The accuracy of the numerical model is validated by comparing numerical results to engineering measurements. The dynamic effect, the characteristic tension force, and the motion parameters that change with Froude number and velocity are also investigated. The results show that when the lowering velocity is between 0.1 and 0.7 m/s, the slings do not sag, even when the sling tension and structure motion parameters vary nonlinearly. The average value of longitudinal and lateral translations increases with decreasing velocity, reaching -1.024 m at its maximum. The roll and pitch motions deteriorate, while the yaw motion weakens, but the yaw angle remains greater than 0.25° at the maximum lowering velocity. The horizontal asymmetric motion of the suction anchor should be fully considered in the lowering operation, and it is unreasonable to only simulate its vertical motion. © 2021, Editorial Department of Journal of HEU. All right reserved.
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页码：1102 / 1109
页数：7
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