UNCERTAINTY ANALYSIS FOR PMM TESTS ON DDG51 FRIGATE MODEL

The present report is edited in the framework of the ITTC Maneuverability Committee activities in order to: 1. assess the experimental uncertainties related to the INSEAN Planar Motion Mechanism (PMM); 2. compare the INSEAN data with the IIHR and Force Technology towing tanks; 3. validate the CFD codes. The scope of the work it is to develop a procedure for the uncertainty assessment to be used for the analysis of global forces acting on ship model during a PMM test. In this report the uncertainties on the traditional maneuvering coefficients are not considered but only the uncertainties on the hydrodynamic forces are examined. Tests are carried out with a 5.71 m between Lpp DDG51 frigate (INSEAN model C. 2340) that is a standard dimension for the INSEAN Large Amplitude PMM. The uncertainty analysis carried out in the present work is directly related to the scheme of the INSEAN PMM and some analytic development can be slightly different for different equipment.