自浮式钢箱-软体多级耗能防船撞装置撞击试验研究

During a ship collision event, both the ship and the bridge would be damaged. In this paper, a kind of multistage energy dissipation and collision protection device that consists of the floating steel box and soft object is proposed, which is installed on the lower pylon column and is able to alleviate the collision damage. To verify the effectiveness of the device, three models of 1:10 scale, including the model of the novel-type ship collision protection device, model of collision-protection steel box and model of an unprotected rigid wall, are prepared by referencing the actual engineering cases. Combined with numerical simulation, the three models are analyzed and compared from aspects of failure mode, dynamic time history response and energy dissipation condition during a collision event. The findings of the study show that compared with the other two models, the novel-type collision protection device model provides more effective protection to the ship bow due to the resilience of the soft object and leads to 31.88% reduction of the peak values of ship collision forces, indicating that the multistage energy dissipation and collision protection device that consists of the floating steel box and soft object has better energy dissipation capacity, which can effectively relieve the damage of ship, pier and collision protection facilities during the collision process.