16th International Symposium on Boat & Ship Archaeology

76 16 th International Symposium on Boat & Ship Archaeology Smiljko Rudan 1 , Šimun Sviličić 1 , Albert Zamarin 2 , Davor Bolf 2 & Irena Radić Rossi 3 1 University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia 2 University of Rijeka, Faculty of Engineering, Rijeka, Croatia 3 University of Zadar, Department of Archaeology, Zadar, Croatia Numerical modelling of flooding of an ancient ship Ancient ships were capable of long-distance sailing while withstanding storms and heavy seas. At the same time, they were built of wood, therefore did not have a large structural safety margin in the case of collision or grounding. Wood behaves as a linear elastic material which suddenly ruptures. Due to that fact, even if these ships were not particularly large and were not sailing fast, so their kinetic energy was limited, they were indeed sensitive to structural damage which might lead to flooding. Flooding is the process of filling the ship’s internal space with fluid through openings in bulkheads, decks, and other elements of the ship’s structure. If flooding is excessive, it certainly leads to the sinking of the vessel. The paper examines the topology of an ancient ship in an attempt to sim- ulate the flooding process for several damage scenarios. A fluid-structure inter- action analysis model is generated, modelling the ship as a rigid body floating freely in a fluid domain. Damage is modelled by removing supposedly damaged finite elements. The sequence and timing of flooding is observed. The scope of the paper is to compare the effect of different damage scenarios on the flooding sequence up to the loss of ship stability. The analysis estimates the time available to the crew in the case of flooding for each scenario. The research is carried out in the framework of the NEREAS Project (IP 2020-02-3420).

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