基于SPH-FEM方法的舷侧与冰山碰撞结构响应

Structural Response of Shipboard Iceberg Collision Based on SPH-FEM Method

传统的有限元数值仿真对于研究高速碰撞大变形等问题具有一定的局限性,建立一套基于光滑粒子流体动力学(SPH)的水介质中小型冰山与船舶舷侧碰撞数值模拟方法,验证SPH模拟冰材料与船-水-冰耦合的合理性,对不同舷侧部位与不同冰山碰撞工况进行数值模拟,分析碰撞形状、面积和速度等对舷侧结构的应力、应变、结构损伤等的影响规律。研究表明,提出的冰山与舷侧碰撞数值模拟方法具有较高的计算精度,对冰山-船舶碰撞的研究具有重要的参考价值。

The traditional finite element numerical simulation has certain limitations for studying the problems of high-speed collision and large deformation. A set of numerical simulation method of small and medium-sized icebergs in water medium and ship side collision based on smoothed particle hydrodynamics(SPH) method is established, which verifies the rationality of SPH method to simulate the coupling between ice material and ship water ice, and numerically simulates the collision conditions of different side parts and different icebergs. The effects of collision shape, area and velocity on the stress, strain and structural damage of the side structure are analyzed. The research shows that the numerical simulation method of icebergs and shipboard collision has high calculation accuracy, and has important reference value for the study of icebergs-ship collision.