Development of numerical methods to determine the roll damping of modern ship hulls: subproject MAT-ROLL

The aim of the research project is to develop mathematical methods to determine the roll damping at an early design stage

By means of modern numerical methods based on the solution of the Reynolds-averaged Navier-Stokes equations, hydrodynamic data bases of modern ship hulls are being developed, in which the damping coefficients are collected in relation to the dimensions of the ship and to the roll parameters.

The results of these numerical calculations are being validated by relevant model tests. In the framework of this validation, the scale effects on the rolling motion are investigated as well.

On the basis of the hydrodynamic data bases, initially a mathematical model is developed in which the relevance of the individual influencing factors on the roll damping is taken into account, and the coupling of these.

Based on this model, the results will initially be compared with those gained from the regression models according to Ikeda and subsequently be subjected to a further regression analysis. From these investigations new, modified regression models are to be developed which, in the focus of modern ship hulls and large roll amplitudes, serve as a future tool to assess efficient roll damping during the design of a ship.

The projekt is sponsored by the Federal Ministry for Economic Affairs and Energy.