SERVICE PERFORMANCE AND SEAKEEPING TRIALS ON A LARGE CONTAINERSHIP

The first large containership to be built for the Compagnie Maritime Belge was the DART EUROPE having a capacity of 1550 units of 25 ft and a service speed of 21 knots. In 1968, at the design stage, it was decided to study the eventual performance of this ship and its behaviour in waves. As this study was to be completed by a sea-model basin correlation, both in smooth water and in waves, it developed into a Belgian--Dutch co-operative venture, the Netherlands Ship Research Centre T.N.O. sponsoring the model tests to be carried out in the Netherlands Ship Model Basin at Wageningen, the Centre Belge de Recherches Navales being responsible for the sea trials. The ship was completed in 1970 and was instrumented: (1) for weather: a shipborne wave recorder and anemometer--windvane; (2) for propulsion: a torsionmeter and a Pitot log; and (3) for motions and stresses: gyro units for pitch and roll, accelerometers for vertical and lateral acceleration, strain gauges along the deck for stresses. As a complete set of data was collected on this ship during the full winter season 1970-71 on fourteen North-Atlantic crossings, in the light (26 ft) as well as in the full-loaded (30 ft) condition, it was possible with the available instrumentation, to carry out a straight forward analysis of the effect of weather on speed, power and ship motions. Wave stresses and impact phenomena have been analyzed and an attempt made to predict the highest load in an extreme sea state. Great attention was paid during this first year's service of the ship to the increase of resistance due to hull roughness. A special run, with and against current, carried out after nine months' service established the power-speed relation of the fouled ship. Due to the unusually large freeboard of this ship, accentuated by the three layers of containers on deck, wind tunnel tests undoubtedly would be useful, and, as for other ships investigated by Ceberena, these tests were carried out by the von Karman Institute for Fluid Dynamics (Rhode-St-Genese.).

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  • Corporate Authors:

    Royal Institution of Naval Architects

    10 Upper Belgrave Street
    ,   USA 
  • Authors:
    • Aertssen, G
    • van Sluys, M F
  • Publication Date: 1972

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Filing Info

  • Accession Number: 00057113
  • Record Type: Publication
  • Source Agency: Netherlands Ship Model Basin
  • Files: TRIS
  • Created Date: Jul 31 1974 12:00AM