【摘要】 针对船舶撞击桥梁的安全问题,提出一种钢-聚氨酯-钢夹层板制作的新型曲面环形浮式桥墩防撞套箱.采用显式动力瞬态非线性有限元软件ANSYS/LS-DYNA建立了船舶撞击桥墩的仿真模型,通过撞击过程中船舶撞击力和速度的变化,分析了船舶、防撞套箱、橡胶护舷、桥墩之间的能量转换以及防撞套箱撞击部位的受力和变形.研究表明:当防撞套箱受最不利撞击时,夹层板曲面环形桥墩防撞套箱能吸收70%的船舶撞击能量,且具有节省箱内加劲板及支架、构造简单、质量轻等特点.本文提出的桥墩防撞套箱具有良好的抗冲击性能和弹塑性能,为工程应用提供了理论依据.更多还原

【Abstract】 To improve the crashworthiness of bridge piers,a new type of annular anti-collision box with curvedshaped made by steel-polyurethane-steel sandwich plate was proposed.Using the ANSYS/LS-DYNA software with explicit dynamic transient nonlinear,the simulation model of ship collision with pier was established.This paper analyzes the energy conversion between the ship,the anti-collision box,the rubber fender and the pier with the changes of the impact force and the speed of the ship in impact process.It also analyzed the stress and deformation of impact parts of anti-collision box.The results show that the bridge pier’s annular anti-collision box with curved-shaped made by the sandwich plate can absorb 70%of the ship impact energy when the anti-collision box is unfavorably impacted,and that the anti-collision box has a saving stiffening plates and brackets,simple structure,and light weight.The study not only shows that the anti-collision box can fully play the impact property and excellent elastoplastic property of the sandwich plate itself,but also provides a theoretical basis for its engineering application.更多还原