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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