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建立了船舶与海洋平台碰撞系统的运动方程式,利用塑性节点法结合大位移理论处理碰撞过程中结构的大变形、塑性以及应变硬化等问题,并考虑了圆管局部凹陷特性、橡胶护舷、水动力、构件屈曲等因素对碰撞过程的影响.文中采用Wilsonθ法结合修正的牛顿-拉夫逊迭代对碰撞结构系统的非线性动力响应进行了数值模拟,并给出了一个典型的供应船与平台碰撞的动塑性分析算例.
The equations of motion of the collision system between the ship and the offshore platform are established. The large deformation, plasticity and strain hardening of the structure during the collision are dealt with by using the plastic nodal method and the theory of large displacement. Considering the characteristics of the local depression of the pipe, the rubber fender, Power, component buckling and other factors on the collision process. In this paper, the non-linear dynamic response of the collision system is numerically simulated by the Wilsonθ method combined with the modified Newton-Raphson iteration. A typical example of the plastic-plastic analysis of the collision between the supply vessel and the platform is given.