【摘要】 频发的船桥碰撞事故对桥墩的防船撞结构设计提出新的要求，常见的防船撞结构均是以结构的塑性变形和破坏来吸收和耗散碰撞能量，而具备能量疏导特性的新型结构可将船舶碰撞产生的应力波沿预设路径疏散，从而在极大程度上削减冲击能量对防船撞结构和被撞桥墩的影响。以柱壳链结构为研究对象，采用有限元分析方法，探究二维模型中柱壳链单胞纵横比对防船撞结构抗冲击特性的影响，并将所得结论应用于三维柱壳链结构设计之中，同时引入相对密度梯度参数。经参数化设计和对比研究发现，正相对密度梯度、胞元纵横比为5/3且按固定间距排布的三维柱壳链结构具有较好的能量疏导性能，可为船桥碰撞领域中具备新型能量疏导性能的防船撞结构设计提供参考。更多还原

【Abstract】 The frequent ship-bridge collision accidents make the new requirements to design the anti-collision structures for the piers. The existing protective structures absorb and dissipate impact energy through large-scale plastic deformation and failure, but the new structure with the characteristics of energy diversion can divert the stress wave generated by the impact along the prearranged path, so greatly reducing impact energy on the protective structure and pier. The cylindrical shell chain(CSC) structure was chosen as the research object. For the 2D CSC structure, the influence of aspect ratio on impact resistance was studied by using the finite element method. The related conclusions were applied to the design of 3D CSC structure, and the relative density gradient was regarded as the parameter. It was found that the 3D CSC structure with positive relative density gradient and aspect ratio of 5/3 reveals extraordinary energy diversion effect. The related conclusions can be used as the references for the design of new types of protective structures that have the effect of energy diversion in the field of ship-bridge collision.更多还原