Dynamic ship response integration for numerical prediction of squat in highly restricted waterways

In this paper we are interested in numerical modeling of 'dynamic' phenomenon of squat by finite elements analysis. It proposes a set of modular numerical tools; therefore, interchangeable. This model enables the study of the interaction between a two-dimensional potential flow in highly restricted waterways on irregular shaped bottom with stationary free surface in taking into account the dynamic response of a ship. The proposed model has been used to validate a stability model based on the extension of the one-dimensional theory of Schijf to the dynamic effects by pointing out stable and unstable squat positions for a ship. It is also shown that for two cases of depth change in shallow water ('step'), unstable position may be reached. Copyright (C) 2009 John Wiley & Sons, Ltd.