船舶碰撞动力学过程的数值仿真研究

摘要

The methodology of numerical simulations,which is essential tosimulate structural damage of colliding ships,is discussed.A typical collision simulation was carried out using MSC/DYTRAN,and the characteristics of collision force,energy absorption and damage deformation were investigated.In collision simulation,ship structures around strike position were modeled as deformable using Lagrangian finite element meshes.The rest structures of ships were treated as rigid,water around struck ships was modeled using Eulerian finite volume meshes.Water effect on striking ships was taken into account by adding suitable virtual mass to the mass of striking ships.%在分析显式非线性有限元基本理论和关键技术的基础上，探讨了船舶动力学过程的数值仿真方法，并对碰撞过程中船体的力学性能进行了分析，获得并讨论了碰撞力、能量吸收和损伤变形的时序结果，所得结论具有一般性。碰撞仿真分析中，被撞船的舷侧受撞区域和撞击船的首部区域作为可变形结构处理，而其余区域则视为刚体。被撞船周围的水划分成Euler有限体积网格，船体结构则划分成Lagrange有限元网格，并采用耦合技术将它们联系在一起。撞击船周围的水的影响采用附连水质量进行处理。