船舶搁浅于刚性斜坡数值仿真的模型化技术

显式非线性有限元分析已逐渐成为研究船舶搁浅问题的重要方法，但其模型化技术是实现数值仿真的关键。本文将搁浅船处理为可变形结构，用弹塑性材料模拟并进行整船建模，斜坡处理为刚体，用刚性材料模拟，船舶与斜坡之间定义为主从接触，船艏定义为自接触。通过仿真计算，获得并讨论了搁浅过程中的船体运动情况、搁浅接触力曲线、能量转化及船舶损伤变形情况。算例表明本文的模型化技术可以用于船舶搁浅的仿真计算。

Modeling Technique of Ship Grounding with Rigid Slope

The explicit nonlinear finite element analysis has gradually become an important method in dealing with the ship grounding problem, in which the modeling technique is the key to the numerical simulation. The grounding ship is treated as a deformable structure and the whole ship is modeled by using the elastoplastic material. The slope is treated as a rigid body and modeled by using the rigid material. A master-slave contact is defined between the ship and the slope. A selbcontact is defined in the bow. A number of numerical results are obtained through the simulation. The results include the movement of ship, the time history curves of the grounding force, the time history curves of energy transition and the deformation of the ship. The example shows that the modeling technique can be used in the simulation of ship grounding.