Characteristics of Slamming Pressure and Force for Trimaran Hull

In this paper, the characteristics of the impact pressure and force of a trimaran section was studied by Computational Fluid Dynamics (CFD). The time domain features of the slamming pressure or force showed a strong correlation with the penetration depth regardless of the specific ways of water entry. The effects of velocity and acceleration on the impact pressure and force were analyzed. It was found that the initial impact of the main hull and the wet-deck slamming were predominantly affected by the entry velocities, whilst the acceleration had almost no effect for initial impact. The impact velocity presented a quadratic relation with slamming pressure/forces, and the relation between acceleration and wet-deck slamming pressure/force was linear. These were consistent with the patterns implied by analytical models such as the Wagner or MLM (Modified Logvinovich model) theories.

Automated summary

This paper studied the characteristics of impact pressure and force of a trimaran section through Computational Fluid Dynamics (CFD). It was found that the time domain features of slamming pressure or force were strongly correlated with penetration depth, regardless of water entry methods. The effects of velocity and acceleration on impact pressure and force were analyzed, showing that initial impact was mainly affected by entry velocities, while acceleration had little effect.