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3 Polish Maritime Research

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Model tests of fast units on the open waters of Jeziorak Lake

Brzoska E., Grygorowicz M., Krężelewski M., Rogalski A.

Polish Maritime Research

2007

S 2

3--7

Paper presents model tests of fast units carried out in the years 1956-2000 in the Experimental Centre of the Gdansk University of Technology Shipbuilding Institute on Jeziorak Lake. The experimental tests included single- and twin-hull hydrofoils, amphibian hovercraft, side-wall hovercraft and also speedboats and SWATH type catamarans. The aim of those tests was to acquire data for developing the design and safety criteria as well as computer programs for predicting the hydrodynamic properties of fast units. The gathered experimental material was used in the theoretical studies, publications and conference papers.

The predictions of resistance and propulsion for 4 types of ships

Brzoska E., Grygorowicz M., Rogalski A., Stasiak J., Szantyr J.

Polish Maritime Research

2004

S 1

34-38

In this paper the predictions of resistance and propulsion for 4 types of ships: container carrier, oil product tanker, ro-ro vessel and river-sea vessel included in the EUREKA "Baltecologicalship" project E!2772 are presented. All the above ships were designed by the SINUS Enterprise Ltd. The scope of the research covers: experimental measurement of ship resistance in calm water, determination of resistance increment in irregular waves and computational powering prediction for POD propulsors. The experiments were conducted in the Laboratory of the Department of Underwater Technology, Hydromechanics and Design of Ships, Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology.

Investigations of transverse stability of semi-displacement ships

Brzoska E., Grygorowicz M., Rogalski A.

Polish Maritime Research

2002

Vol. 9, nr 4

3-7

In this paper results of experimental model investigations of transverse stability of semi-displacement ships are presented, aimed at determination of influence of their speed and hull form parameters on transverse stability. On the basis of these results algorithms were elaborated which take onto account righting arm changes in function of ship speed, heel angle and geometrical hull parameters. The algorithms can be used for assessment of transverse stability of ships of the kind.