Abstract The light-weight gravity installed plate anchor (L-GIPLA) is a plate-shaped anchor for securing offshore floating structures, which is dynamically installed with the aid of a booster. Therefore, it is necessary to investigate the hydrodynamic characteristics of the hybrid anchor (L-GIPLA + booster) during free fall in water. Model tests are conducted in the present study to investigate the drag coefficient and directional stability of the L-GIPLA and the corresponding hybrid anchor. On the basis of model testing results, the geometry of the L-GIPLA is optimised with tapered fluke with round-grinded edge and folding shank. It is verified by model tests that the modified anchor with folding shank is favourable for improving the directional stability and reducing the drag coefficient for the hybrid anchor. In order to mitigate the effect of the mooring line on the directional stability of the hybrid anchor, an arched fin or fan-shaped plate is set at the rear of the hybrid anchor in the direction opposite the shank to balance the drag force on the mooring line.

中文翻译：

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一种折柄重力安装锚及其在水中的水动力特性：物理建模

摘要 轻型重力安装板锚（L-GIPLA）是一种用于固定海上浮式结构的板状锚，借助助推器进行动态安装。因此，有必要研究混合锚（L-GIPLA+助推器）在水中自由落体时的水动力特性。本研究进行了模型试验，以研究 L-GIPLA 和相应混合锚的阻力系数和方向稳定性。在模型测试结果的基础上，L-GIPLA 的几何形状通过带有圆磨边和折叠刀柄的锥形尾刀进行了优化。通过模型试验验证，折叠柄改进型锚杆有利于提高混合锚杆的方向稳定性和降低阻力系数。