桥梁防船撞钢套箱的碰撞力快速估算

研究船舶与单墩桥梁防撞钢套箱艏尖舱的碰撞过程,探讨碰撞力快速估算及防撞装置模块化设计的可行性。首先采用非线性有限元方法模拟1 000吨级三峡标准散货船与钢套箱式桥梁防船撞装置的碰撞过程,分析了防撞钢套箱艏尖舱在不同的斜边角和船舶碰撞速度下的能量吸收特性以及传递至桥墩的碰撞力特性,得到的结果可为防撞钢套箱外形的选择提供参考。对所选择的防撞钢套箱形式,采用Boltzmann函数拟合了撞击船速与桥梁所受横桥向及顺桥向碰撞力之间的关系,该拟合公式可以用于此类防撞钢套箱方案设计阶段的撞击力快速估算。

Rapid assessment of collision force between ship and steel box of bridge protection

The aim of this paper is to investigate the design method of protection device for single bridge pier in order to against 1 000 DWT ship collision. The nonlinear FE analysis is used to simulate the collision procedure between the Yangtze River standard bulk carriers and the steel box of bridge protection. The influences of slope angle of the protection device bow on the absorption characteristics and the collision force are investigated. The results of analysis could be as reference for designing steel box of bridge protection against ships collision. The Boltzmann equation is adopted to fit the relationship between velocities of the striking ship and collision forces of bridge pier, which could be used for rapid assessment of collision forces in the primary design for this kind of protection device.