A new modelling arrangement for testing of Catenary Anchoring Leg Mooring (CALM) system behaviour in waves

Abstract

Model tests of the Catenary Anchoring Leg Mooring (CALM) systems are often carried out in elongated tanks which makes it necessary to significantly distort catenary of the anchoring chains, and causes a complication when checking test results by numerical models, or alternatively - to reduce the model scale which leads to increasing scale effects. In the paper a new model testing arragement is presented where all chains are placed in planes parallel to the tank axis which makes numerical calculations easier and modelling the system in a greater scale possible.