RISK FORECAST SYSTEM FOR MOORED SHIPS

Liliana Pinheiro,Maria Teresa Reis,Joao Santos,Carlos Guedes Soares,Conceicao Fortes

doi:10.9753/icce.v36v.management.37

Abstract

Port terminals downtimes lead to large economic losses and largely affect the port's overall competitiveness. In the majority of cases, port activities such as ships' approach maneuvers and loading/unloading operations, are conditioned or suspended, based solely on weather or wave forecasts. These forecasts do not always result in effective hazardous conditions for the ships. Additionally, moored ships often experience problems of excessive movements and mooring forces in apparent good weather conditions. If, instead, one could forecast the ships' movements and mooring forces, risk assessment would be much more accurate. This would allow selecting an appropriate reinforced mooring arrangement and thus minimizing effective terminal downtime. In this paper, the development of a risk forecast system for moored ships, that takes into account all of the moored ship's system, is detailed and an illustration on how it applies to real ports is presented.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/ugDN9Tqno3E

Highlights

The development of a risk forecast system for moored ships, that takes into account all of the moored ship’s system, is detailed and an illustration on how it applies to real ports is presented
Port operations – Wave effects in terms of excessive vertical movements of a maneuvering ship that enters or leaves a harbor basin or in terms of forces on mooring lines and fenders as well as of motions of a ship moored at a quay, are determined using numerical package MOORNAV (Santos, 1994), which includes: WAMIT hydrodynamic panel method numerical model (Korsemeyer et al 1988) for the assembly of hydrodynamic response from the radiation and diffraction problems and BAS (Mynett et al 1985) time domain solver of moored ship motion equations taking into account external forces such as incident sea waves, wind, currents and mooring system elements; III
Risk assessment - Comparison of the relevant variables computed values with pre-set maximum values and probability assessment of exceedance of those values results in a risk level assessment; IV

Summary

Introduction

The development of a risk forecast system for moored ships, that takes into account all of the moored ship’s system, is detailed and an illustration on how it applies to real ports is presented. The system was first developed to the Praia da Vitória Port (Pinheiro et al 2018), followed by the ports of S.

Results

Conclusion