To improve DIPRO

DIPRO is a software tool used to predict the loads from passing ships on bank protections etc. DIPRO is based on analytical formulas, derived from systematic measurements and theoretical analysis of water motion around a ship. The influence of eccentric navigation of a ship needs improvement in DIPRO.

FINEL is used to model the ship induced water movement for eccentric ships. The results of FINEL are used to check and improve the results of DIPRO. First the results of FINEL are validated with measurements of the passing of the Grande America in the Noordzeekanaal. The colour plot shows the primary wave of a passing ship. The comparison with measurements shows good agreements, both for the depression of the water level as for the return currents. After the validation several scenario runs are executed with FINEL in order to improve the results of DIPRO.

The reason to use FINEL in stead of measurements to improve DIPRO is that with FINED the effect of eccentricity can be isolated from other effects always present in measurements. Also it is easier to execute several scenario runs with a computer model for different ship sizes, velocities and eccentricity, than to execute several different measurements.