Study on the penetration process of torpedo anchor into layer soils

Abstract

Wing torpedo anchor is a new type of gravity anchor which is installed by self weight and anchored by gravity and seabed resistance. Based on the T98 torpedo anchor, the penetration process of torpedo anchor in layer soils is numerically simulated, and the change laws of penetration resistance, acceleration, velocity and penetration energy with depth is analyzed. The results showed that the end resistance and the friction resistance broke at the interface of soil layers, and the friction resistance increased with increasing of depth, while the end resistance first increased and then decreased. With the increasing of depth, the acceleration increased and the velocity decreased. In the early stage of penetration, the work is mainly done by the end resistance, whereas the work is mainly done by the side friction resistance in the later stage, suggesting that the side friction resistance consumed more anchor energy than the end resistance.