Sea Trials and Model Tests for Validation of Shiphandling Simulation Models

Validation of simulation models for ships should be given high priority as such models are increasingly being used for both engineering studies (documenting manoeuvring characteristics, investigating operational limits in restricted waters, port design an d investigation of accidents) and training purposes (sea time reduction, familiarization, advanced and critical operations). In general, simulation models for ships are more generic than those applied for other transport means such as aircraft, trucks, or cars. Norwegian shipowners invest in high value specialized vessels with efficient control systems. More ship specific simulation models are needed for such vessels to optimize operational procedures and enhance operational performance of navigation off icers. All research partners in the project have developed and are using numerical simulation models to study ship manoeuvring characteristics in open sea and in restricted waters, such as waterways and ports. However validation of these simulation models has, until now, been done in a mostly superficial way. The main research task in this project is to perform benchmark studies comparing model outcomes to results from specific or in-service field tests of selected ships. In previous validation studies su ch as for Esso Osaka and the vessels studied in the SIMMAN 2008 context, IMO's standard manoeuvres have been used for comparison of simulation outcomes and test results. From shipmasters and pilots, as well as scientists, it has been commented that the IM O Standard manoeuvres are not representative for ship operation at low speed and in confined waters. Experienced ship masters from participating shipping companies will take part in project workshops to specify new low speed and shallow water tests that s hould be used in the validation study for low speed shiphandling.