Research on the optimal spacing resistance reduction technology for ship formation

Abstract

In nature, there are often numerous phenomena of collective movement, such as geese flying and fish swimming. To explore the advantages of swarm motion, this paper examines swarm motion from the perspective of energy consumption. Focusing initially on the common scenario of ducklings swimming with their mother, two ellipsoids with similar geometry were introduced to simulate the swimming motion and analyze movement resistance. The results show that within a certain distance range, the resistance of the ellipsoid in the rear is significantly reduced compared with the resistance of a single ellipsoid. The resistance reduction effect is related to the spacing of the two ellipsoids, and there is an optimal spacing for resistance reduction at different moving speeds. Subsequently, resistance calculations and energy-saving analyses were conducted for four Unmanned Surface Vessel formations, revealing that formation navigation had a significant energy-saving effect. Additionally, this paper includes an experimental study of a ship formation model, and the calculation results are compared with the experimental results, verifying the reliability of the swarm motion resistance calculation method. Finally, a formula for optimal spacing in ship formations to reduce resistance is proposed, providing a convenient and feasible energy-saving reference for actual ship formation navigation.

Keywords

• Wave interference
• Energy consumption
• Ship formation
• Model test
• Resistance reduction technology