基于Ls-dyna的船舶与码头碰撞动力特性仿真分析

运用非线性显式有限元的方法,分析船-码头碰撞的全过程,探讨碰撞部位对船舶动力特性的影响规律,揭示船-码头碰撞过程中船体构件的受损情况,预报碰撞力及变性能的时程变化规律。研究表明:船舶与码头发生首碰、尾碰时,船舶主要受力构件、受力特点明显不同,主要受力构件的应力分布特点是分布面积小,维持时间长,应力数值大;次要受力构件的应力分布特点是分布面积大,维持时间较短,应力数值小性。船舶与码头碰撞过程中伴有船舶的凹陷及船体外板的运动,在实际工程中应当给予足够的重视。

Simulation analysis of dynamic characteristics of collision between ship and dock based on LS-DYNA

In this paper, the nonlinear explicit finite element method is adopted to analyze the whole process of ship-todock collision, to explore the impact law of collision position on ship’s dynamic characteristics, to reveal the damage of hull components during ship-to-dock collision, and to predict the time-history variation law of collision force and variable performance. The research show that when the ship and the dock meet at the head and stern of the ship, the main stress components and stress characteristics of the ship are obviously different. And the stress distribution of the main stressed components is characterized by small distribution area, long maintenance time and large stress value, the stress distribution characteristics of secondary stressed members are as follows: large distribution area, short maintenance time, small stress value, depression of ship and movement of hull plate during collision between ship and wharf which enough attention should be paid in practical projects.