Abstract Polar ships and offshore platforms frequently experience floating ice impacts or iceberg collisions in Arctic region, which may cause permanent deformations of plates, resulting in negative effects on their work performance. The modeling of ice material is critical and difficult point to study the ice-structure interaction. This paper proposes a new ice material model based on a soil and concrete material model (MAT 78) with some user-defined ice material curves applied, to simulate the ice mechanical behavior in an ice-plate impact scenario. Calibration of the proposed ice material model is performed by comparing the pressure-area relationship recommended by the International Organization for Standardization (ISO) rules. Using this proposed ice model, numerical simulations are conducted to study the dynamic behavior of plates under ice impact by using LS-DYNA finite element program. The related model tests were also performed to verify the accuracy of the results calculated by numerical method. Besides, a series of numerical simulations are conducted to investigate the influences of initial ice impact kinetic energy and ice impact momentum on ice-plate impact. The maximum plastic deformations of plate, energy absorption of plate and energy dissipation of ice damage during the ice impact process are studied in these numerical simulations.

中文翻译：

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基于混凝土本构冰模型的冰冲击下板块数值模拟

摘要 极地船舶和海上平台在北极地区频繁发生浮冰撞击或冰山碰撞，可能导致板块永久变形，对其工作性能产生负面影响。冰物质建模是研究冰-结构相互作用的关键和难点。本文提出了一种基于土壤和混凝土材料模型 (MAT 78) 的新冰材料模型，并应用了一些用户定义的冰材料曲线，以模拟冰板撞击场景中的冰机械行为。通过比较国际标准化组织 (ISO) 规则推荐的压力-面积关系来执行建议的冰材料模型的校准。使用这个提议的冰模型，利用LS-DYNA有限元程序进行数值模拟研究冰冲击下板块的动态行为。还进行了相关模型试验，验证了数值方法计算结果的准确性。此外，通过一系列数值模拟研究了初始冰撞击动能和冰撞击动量对冰板撞击的影响。这些数值模拟研究了冰冲击过程中板的最大塑性变形、板的能量吸收和冰损伤的能量耗散。通过一系列数值模拟研究初始冰撞击动能和冰撞击动量对冰板撞击的影响。这些数值模拟研究了冰冲击过程中板的最大塑性变形、板的能量吸收和冰损伤的能量耗散。通过一系列数值模拟研究初始冰撞击动能和冰撞击动量对冰板撞击的影响。这些数值模拟研究了冰冲击过程中板的最大塑性变形、板的能量吸收和冰损伤的能量耗散。