船舶与桥墩防撞系统碰撞的数值仿真分析

Numerical simulations of ship collision with protective devices of bridge pier

船舶与桥墩防撞系统的碰撞是一种复杂的非线性动态响应历程,整个系统的动态变形和应力变化过程主要取决于桥墩防撞系统的特性。探讨了碰撞力学及数值仿真分析的基本原理,并以某跨海大桥为例,借助于非线性有限元软件LS-DYNA,仿真分析了船舶撞击桥墩防撞系统的基本过程,反映了船舶与桥墩防撞系统碰撞时碰撞力、能量转化及防撞系统能量吸收和变形的时间历程,可供同类型桥墩防撞系统设计参考。

It is very complicated to calculate the nonlinear dynamic response history of ship collision with bridge pier protective devices. The dynamic deformation and stress changes of pier protective devices depend on its characteristics. The basic principle of collision mechanics and numerical simulation analysis is discussed in this paper, and taking a bridge across the sea as an example, the whole process of ship collision with protection equipment of bridge pier is simulated and analyzed by employing LS - DYNA nonlinear FEM program. Simultaneously, the time history of the collision force, the exchange of energy, and the energy absorption and deformation of collision protection equipment is presented, and can be used as reference to the design of the similar collision protection equipment.