An Investigation of the Performance of a Pusher-Barge System Considering Advancing Velocity in Regular Waves

Abstract

This study investigates the performance of a pusher-barge system advancing in regular waves. The numerical simulation is carried out through the implementation of an in-house code, "AdFlow" (Advanced Analysis System for Floating Bodies in Waves), for the evaluation of first-order hydrodynamic properties. AdFlow allows the numerical analysis of motion responses by solving the potential flow around multi-bodies using a higher-order boundary element method (HOBEM) and wave Green function in the frequency domain. In this investigation, a pusher tug is arranged and located at the stern notch of a barge in a linear combination, connected with a well-proven coupling system. The study considers a coupling system configuration for the pusher-barge system using a connection pin, which allows the system to work as a single unit. The chosen connection pin system allows an independent pitch motion, while roll and yaw motions remain coupled. This research analyzed the advancing velocity condition for the pusher-barge system by considering three different heading angles in deep water. Moreover, this study evaluates six-degrees-of-freedom motion and calculates loads and moments acting on the connecting pin for different wave periods. Finally, this study compares and discusses response amplitude operators.