2023-06-252023-06-25https://tore.tuhh.de/handle/11420/16233To reduce the environmental, economical, and safety consequences of ship collisions, it is compulsory that hull structures of all oil tankers arrange for double sides and bottoms. It is clear that double hulls lead to an increase of crash-worthiness and mitigate the possibility of severe damage in ships body and oil spill. Recently, various studies have been conducted to improve the efficiency of double hulls with adding some granular materials into the space between the two walls. In the current research, the collision of double hull vessels filled with energy absorbing granular materials will be studied on both micro and macro scales. For this purpose, the compaction behavior of granulates will be studied at first using DEM. Then considering a representative volume element (RVE) and homogenization technique, the mechanical properties of the particles will be identified for the continuum model. At the next step, since the granular material must be modeled by different methods in different sub-domains (DEM and FEM), a bridging or coupling must be established in the domains interface using, for example, the Arlequin method. At the end, the collision problem in double hull vessels will be simulated and the effects of influencing parameters can be investigated. Project partners: Prof. M. Dosta (TUHH)