Prophase Study Of The Ship Type Of 300,000t VLCC With Super Shallow Draught

The future market of the 300,000t twin-skeg type VLCC with super breath and shallow draught is prospective. The shipyards of Japan and Korea have monopolized the VLCC industry for a long time for their abundant experience of design and building VLCC. Comparing with them, our shipyards are in the worse place. It is the first try for us to study the 300,000t twin-skeg type VLCC with super breath and shallow draught, which can lead us to hold the design and building technology of the new generation VLCC. Our terminal goal is to be competitive in the VLCC market.Chosen from the title of "the 300,000t twin-skeg type VLCC with super breath and shallow draught ", the subtitle of general arrangement and structural optimization are studied in this paper.The lines design and optimization for the 300,000t twin-skeg type VLCC was proceeded. In order to validate the lines' resistance and performance ability, the resistance test and self-propulsion test was carried out. In the test, the influence on the ship resistance and performance ability of changing the shaft angle of the skeg was discussed.Then, Through stability calculation and analysis for the result, the location of the oil-tight/water-tight transverse bulkheads in the cargo tank area were partly transferred again and again, so that the intact stability and the damaged stability can comply with the latest criterion of "IMO". At the same time, how to decrease the still water bending moment at the ballast condition is another main subject in the paper.At last, the 3-D finite element calculation within the midship area was carried out to analysis the transverse strength of the structural members, and the reference idea of structure optimization and lighting steel weight was submitted.