摘要
Ships navigating in ice-covered regions will inevitably collide with ice ridges.Compared to other ice bodies,ice ridges exhibit more complicated mechanical behaviors due to the scale and structure characteristics.In this paper,nonlinear finite element method is used to investigate the interaction between a polar ship and an ice ridge.The ice ridge is modelled as elastic-plastic material based on Drucker-Prager yield function,with the consideration of the influence of cohesion,friction angle and material hardening.The material model is developed in LS-DYNA and solved using semi-implicit mapping algorithm.The stress distribution of ice ridge and ship,and the ice load history are evaluated through the simulation of multiple collisions.In addition,parametric analysis is performed to investigate the influence of ridge thickness and impact velocity on the ice load and energy absorption.
极地船舶在冰区航行时将不可避免地与冰脊发生相互作用。相比于其他类型的冰体,冰脊由于其尺度与结构特点,呈现出更为复杂的力学特性。本文采用非线性有限元方法研究极地船舶与冰脊之间的相互作用。基于弹塑性模型建立冰脊模型,并选取Drucker-Prager屈服准则,同时考虑粘聚力、摩擦角以及硬化的影响。将开发的材料模型嵌入LS-DYNA中,通过半隐式图形返回算法进行求解。通过模拟冰脊与船舶的多次碰撞,评估冰脊和船体的应力分布以及冰载荷的时历变化。此外,通过参数化分析,讨论冰脊厚度和冲击速度对冰载荷和吸能结果的影响。
出处
《船舶力学》
EI
CSCD
北大核心
2024年第12期1908-1924,共17页
Journal of Ship Mechanics
基金
国家自然科学基金资助项目(52192690
52192695)。
