运河桥梁浮式防船撞设施的模拟计算

Simulation calculation of floating-facility for anti-collision between ship and bridge over canal

为了避免船舶与桥墩的直接碰撞,达到既保护桥墩安全又保护船舶安全的目的,根据苏南运河桥梁防撞设计的特殊要求,利用船和防撞设施碰撞中走锚、浮体移动和锚链拉伸过程来消耗船舶动能的柔性浮式防撞原理,提出了桥墩防船撞设施方案;基于有限元分析软件AN SYS/LS-DYNA,建立了一艘1000 t级货船与防撞设施的碰撞模型,分析了撞击力、能量转换的特点和规律,并与船舶和桥墩直接碰撞的结果作比较,研究了浮式防船撞设施的工作效能。结果表明,浮式防船撞设施能够满足桥墩防撞要求,可为运河桥梁防撞设计提供参考。

To avoid direct collision between the ship and the pier and to ensure the security of both the ship and the pier, a scheme of the anti-collision facility between the ship and the bridge was introduced according to the special requirements of anti-collision design of Sunan Canal bridge based on the theory of depleting kinetic energy of ship during anchors movement, the floating-body mobile and the cables pull extensor process. Also, depending on the finite element analysis software ANSYS/LS-DYNA, a collision model of a class 1000t cargo and the anti-collision facility were set up to analyze the impact force, the characteristics and the law of energy conversion in direct collision between the ship and the anti-collision facility. The result was compared with that of the collision between ship and pier to study the performance of the floating anti-collision facility. The study shows that the anti-collision floating facility meets the anti-collision requirements of the pier, which may provide a reference for anti-collision design of bridges over Jing-Hang Grand canal.