Numerical investigations of hydrodynamic performance of dynamically installed anchors subjected to current considering anchor geometric effects

Zhang，Biao1,2; Fu，Yong1,2

2023-10-01

10.1016/j.oceaneng.2023.115303

Ocean Engineering   Impact Factor & Quartile

0029-8018

1873-5258

Dynamically installed anchor is an innovative and cost-effective technology in marine foundation engineering. However, most of the existing researches on the hydrodynamic characteristics of dynamically installed anchors are limited to their free-fall installation performance in water without considering the action of marine environmental loads such as current. Therefore, this study aims to investigate the hydrodynamic performance of dynamically installed anchors subjected to current in a systematical manner. A complete three-dimensional CFD model is firstly established using “dynamic model analysis” method. Then, the effects of anchor geometric characteristics on the installation efficiency (i.e., penetration velocity and drag coefficient) and installation positioning accuracy (i.e., lateral velocity and displacement, and inclination angle) of the anchors subjected to current are systematically studied using the established CFD model. The influences of current velocity, current direction and geometric characteristics including anchor shaft geometry and anchor fin geometry on the hydrodynamic characteristics of anchor are discussed. Based on the obtained findings, some practical design recommendations are given, and a simple semi-empirical method for estimating the falling velocity and inclination angle of dynamically installed anchor subjected to current considering anchor geometric effects is finally proposed, which may benefit the engineering design of dynamically installed anchors.

Anchor geometry CFD analysis Current Dynamically installed anchor Hydrodynamic behavior “Dynamic model analysis”

SCI

English

First ; Corresponding

National Natural Science Foundation of China[52001157];

Engineering ; Oceanography

Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography

WOS:001042848100001

PERGAMON-ELSEVIER SCIENCE LTD

ENGINEERING

2-s2.0-85164661124

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,511458,China

Zhang，Biao,Fu，Yong. Numerical investigations of hydrodynamic performance of dynamically installed anchors subjected to current considering anchor geometric effects[J]. Ocean Engineering,2023,285.

Zhang，Biao,&Fu，Yong.(2023).Numerical investigations of hydrodynamic performance of dynamically installed anchors subjected to current considering anchor geometric effects.Ocean Engineering,285.

Zhang，Biao,et al."Numerical investigations of hydrodynamic performance of dynamically installed anchors subjected to current considering anchor geometric effects".Ocean Engineering 285(2023).