Validation of Resistance Predictions Using Total Ship Drag (TSD)

Abstract : A robust computational tool has been under development at the Naval Surface Warfare Center, Carderock Division (NSWCCD) over the past several years to rapidly predict the resistance of ships, including high-speed ships and unconventional hull forms. The total ship drag (TSD) program utilizes slender ship theory to predict the wave-making resistance, the ITTC friction line to estimate frictional resistance, and adds several other components based on empirical data. The different components of resistance respond to changes in the hull form, which can be defined quickly using unstructured triangular elements. Some validation efforts have been carried out in the past. This report provides some further documentation of resistance validation of the TSD predictions compared with model test data for both monohulls and multi-hulls. In addition, for specific cases the TSD predictions are compared with other computational prediction methods. The TSD program also includes the ability to predict hull wave profiles and elevations of the wavefield caused by the wave-making of the ship. Some qualitative observations will also be provided here regarding these capabilities. The current version of the code has been updated for inclusion in the CREATE-Ships Integrated Hydrodynamic Design Environment (IHDE) which is currently under development.