船桥碰撞撞击力的有限元数值模拟与分析

Finite element numerical simulation and analysis of impact force of ship-bridge collision

文章基于整船整桥有限元模型,分析了万吨级船舶在不同船体吨位、撞击角度和撞击速度时的船桥碰撞过程,得到不同碰撞情况下的撞击力时程曲线,详细讨论了计算结果,并与国内外规范计算值进行分析比较。结果表明:撞击力与船舶吨位的平方根近似成线性关系,与撞击速度近似成线性关系;随着撞击角度增大,撞击力减小,撞击时长增加。对于万吨级船舶与桥碰撞问题,建议采用AASHTO规范或欧洲规范-远洋计算撞击力。

Based on the finite element model of whole ship-bridge,the process of ship(over 10 000 DWT)-bridge collision under different tonnage of ship,impact angle and velocity is analyzed.Collision impact force curves with time are presented.The computational results are discussed and compared with the results of codes and standards at home and abroad.The results show that there is an approximately linear relationship between the impact force and the impact velocity,so is between the impact force and the square root of the tonnage of the ship.With the increase of impact angle,the impact force decreases and the time of the impact increases.For ships over 10 000 DWT with bridge collision,the AASHTO code or the European ocean code is recommended to calculate the impact force of ship-bridge collision.