Advance development in engineering and technology has been massively triggered by establishment of the free market memorandum between countries across the globe. Explicitly, this agreement affects ship and offshore industries, where stakeholder and investor demand a wide range of accidental damage assessment. Achievement of this objective is highly influenced by sustainable research on maritime accidents. Ship grounding is categorized in impact phenomena, and record has evidenced grounding as the most risky accident. Since it is capable to evoke massive losses, estimation of structural performance and limit under grounding is required. This work aims to evaluate crashworthiness of a thin-walled tanker structures in encountering ship grounding. A series of benchmark simulations based on pioneer experimental test is re-performed as calibration of numerical configuration for grounding analysis. Several scenarios are designed in this stage by varying mesh sizes on the idealized test geometry. Preparation for the grounding analysis is presented in the next stage. Considering its characteristic as impact load, powered-hard scenario is taken into account as the worst possible damage on the structures. It is assumed that grounding happens suddenly when the tanker is in a voyage and interacts with a hard object. A medium-carbon steel is embedded with the Det Norske Veritas - Germanischer Lloyd (DNVGL) fracture criterion. In this study, an oceanic obstruction is defined as seabed reef geometry with the properties are adopted based on data of ocean crustal seismology. Varieties of location, angle and elevation are applied to accidental grounding scenarios. The assessment of structural crashworthiness brings an insight into the effect sensitivity of the parameters on the double bottom behavior. Brief recommendation for grounding simulation is provided in final conclusion to give adequate references in applying numerical input and configuration, especially using the finite element (FE) method.
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机译：全球各国之间建立自由市场备忘录，极大地触发了工程技术的先进发展。明确地，该协议影响到船舶和海上工业，利益相关者和投资者要求进行广泛的意外损害评估。对海洋事故的可持续研究在很大程度上影响了这一目标的实现。船舶着陆是根据撞击现象进行分类的，记录表明，着陆是最危险的事故。由于它能够引起巨大的损失，因此需要估算结构性能和接地极限。这项工作旨在评估薄壁油轮结构在遇到船舶着陆时的耐撞性。重新执行了一系列基于先驱实验测试的基准模拟，作为对接地分析数值配置的校准。在此阶段，通过改变理想测试几何图形上的网格大小来设计几种方案。下一步将介绍接地分析的准备工作。考虑到其作为冲击载荷的特性，考虑到动力困难的情况，认为这是对结构的最严重损坏。假定当油轮在航行中并与坚硬的物体相互作用时，接地会突然发生。中碳钢嵌入了Det Norske Veritas-Germanischer Lloyd（DNVGL）断裂准则。在这项研究中，将海洋障碍物定义为海底礁的几何形状，并根据海洋地壳地震学数据采用了这些属性。各种位置，角度和高程都适用于意外接地情况。对结构耐撞性的评估带来了对参数对双底行为的影响敏感性的了解。最终结论中对接地仿真提供了简短的建议，以便为应用数字输入和配置（尤其是使用有限元（FE）方法）提供足够的参考。
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