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Dr. Dirk Jürgens

(Thursday, September 23, 10:00 - 10:30 p.m.)

Enhanced Dynamic Positioning Capability (DP) in Combination with Innovative Roll Stabilization

The requirements for the DP capability of vessels have increased significantly in recent years. In the offshore wind sector, service engineers have to be transferred to wind turbines on a daily basis to carry out maintenance work. They are not experienced seafarers and therefore the demand for a comfortable ship even in rough seas has increased significantly.
In joint R&D activities of the University of Rostock, SVA Potsdam, TU Hamburg, and Voith, an improved DP technology has been developed that includes both accurate vessel position holding and roll reduction. Particular emphasis was placed on ensuring that the control algorithms, thruster allocation, and hydrodynamics of the vessel and propeller were designed to minimize energy consumption. Comparative tests were also performed where the goal was to achieve maximum accuracy of the required ship position.
With the developed calculation method it is possible to equip ships with different types of propellers (Voith Schneider Propeller, Azimuth Thruster, conventional Propeller + Rudder) and study their influence. The adjustment speed of thrust on the accuracy of the DP process is studied in detail. The result is important for the choice of the propulsion system and the operational capability of the ship.
In the presentation, the calculation method/results and model test results will be presented, as well as full-scale experience.

About

Dirk Jürgens studied Naval Architecture at the University of Rostock from 1983 till 1988. From 1988 till 1993, he worked as a research assistant at the University of Rostock and the University of Hamburg. In 1994 he finished his Ph.D. thesis about the hydrodynamic of Voith Schneider Propellers.
From 1993 till 1999 he worked at the Ship Yard Blohm & Voss in Hamburg as the manager of an R&D group for the development of propulsion and maneuvering devices.
Since 1999 Dirk Jürgens is the Head of Research and Development of Voith Turbo Marine.