Abstract A finite element collision system model was established by using ANSYS/LS-DYNA for a new type of bridge anticollision device with stiffeners made of steel–polyurethane sandwich plates. The model is composed of the anticollision box, the bridge pier, and the ship. In this paper, a numerical dynamic calculation method was used to calculate the impact force of the box and the pier column, the collision depth of the ship, and the energy absorbed by various parts of the system in the most unfavorable frontal collision condition. Then, the influence of the different types and numbers of stiffening ribs on the anticollision performance of the system was analyzed, so as to properly arrange the stiffeners inside the box. The result shows that this kind of anticollision box can effectively protect the pier. When a frontal collision occurs, it can absorb >70% of the impact energy, while the pier only bears

中文翻译：

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钢-聚氨酯夹层板防撞箱碰撞性能分析

摘要 利用ANSYS/LS-DYNA建立了钢-聚氨酯夹芯板加劲肋的新型桥梁防撞装置有限元碰撞系统模型。模型由防撞箱、桥墩、船舶组成。本文采用数值动力学计算方法计算箱体与墩柱的冲击力、船舶碰撞深度以及系统各部分在最不利正面碰撞条件下吸收的能量。然后，分析了不同类型和数量的加强筋对系统防撞性能的影响，以便在箱体内合理布置加强筋。结果表明，这种防撞箱可以有效地保护码头。当发生正面碰撞时，