Finite element analysis of damage characteristics of fishing vessels in collision between merchant and fishing vessels
LI Mengyang，XU Shuo*，DUAN Ruoheng，SHI Xufang
1.Fisheries Engineering Institute，Chinese Academy of Fishery Sciences，Beijing 100141，China；2.College of Shipbuilding Engineering，Harbin Engineering University，Harbin 150001，China
Abstract: In order to investigate the impact of various collision conditions on the damage characteristics of a large merchant vessel colliding with a fishing vessel, referred to as a commercial fishing vessel collision, the collision process was simulated in a typical 42 m fishing boat as an example, and under collision conditions of different collision angles, speeds, and masses, using finite element method and LS-DYNA software, resulting in stress-strain cloud maps and energy curves for the hull damage of the fishing boat. The variation law of damage characteristics of the fishing vessel with collision conditions was obtained through analysis. The results indicated that there was the maximal damage degree in the collided fishing boat at the speed of 8 m/s in the merchant ship and at the collision position in the middle of the cabin, resulting in broken hulls and fractured skeletons under the conditions in present study. The vessel experienced both vertical force and force along the direction of captain at the collision angle of 60°, leading to the largest hull fracture. While a merchant ship weighing 10 000 tons caused the most severe hull damage, when the weight exceeded 10 000 tons and there was a significant tonnage gap between the ship and the fishing boat, increasing mass had little effect on the extent of damage of fishing boat. The findings indicate that finite element simulation methods can be employed to analyze the structural damage of commercial fishing boats during collisions. In commercial fishing vessel collisions, factors such as mass, collision speed, angle, and position of merchant vessels significantly influence the damage degree of fishing vessels, with collision speed, mass, and other factors positively correlating with damage severity.
李梦阳, 徐硕, 段若衡, 史旭芳. 商船和渔船碰撞中渔船损伤特性的有限元分析[J]. 大连海洋大学学报, 2023, 38(6): 1052-4062.
LI Mengyang, XU Shuo, DUAN Ruoheng, SHI Xufang. Finite element analysis of damage characteristics of fishing vessels in collision between merchant and fishing vessels. Journal of Dalian Ocean University, 2023, 38(6): 1052-4062.
2023, Vol. 38 
