Ship Design Lecture Notes TANIMLAR Doç.Dr. Ercan KÖSE www.ercankose.0catch.com BASIC DEFINITONS AND SHIP GEOMETRY Figure illustrates the main parts of a typical ship. Hull: The structural body of a ship including shell plating, framing, decks and bulkheads.
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Doç.Dr. Ercan KÖSE www.ercankose.0catch.com
The weight of water that would displaced by the volume of the hull measured on the outer surface of the shell plating below the waterline. Displacement tonnage of a vessel can be obtained directly from Archimedes’ principle by multiplying its underwater volume by the density of water.
The lightweight tonnage of a ship is the sum of all fixed weights, i.e. hull, machinery, outfit and permanent equipment.
The difference between the displacement and the lightweight is the deadweight tonnage which is the sum of the weight of cargo, fuel, lubricating oil, fresh water, stores, passengers and baggage, crew and their effects.
Tank ships are described in terms of oil carrying capacity. Barrel (bbl)
is the standard liquid cargo unit of measurement and one barrel
consists of 42 gallons (5.515 cubic feet, 0.156 cubic meter). One ton of
fuel oil is equivalent to 6.63 barrels.
Dry bulk cargo ships may also be described in terms of Cubic Bales or
Cubic Grain. Cubic Bales is the space available for cargo measured in
cubic feet within a ship cargo hold to the inside of the cargo battens,
on the frames and to the underside of the deck beams.
Grain cubic isthe maximum space available for the cargo within a
ship's hold in cubic meter, incorporating all volume inside the shell
plating of the hull and to the underside of the upper deck plating. Grain
Cubic occupies a larger cargo volume than the ship's Bale Cubic rating.
Cargo ships are generally one of the following types:
A general cargo ship is a ship with open cargo holds loaded vertically through hatches in the upper deck. The holds may be divided by intermediate decks called tween decks.
An extension of the container ship concept is the barge-carrying ship. In this concept, the container is itself a floating vessel, usually about 60 feet long by about 30 feet wide, which is loaded aboard the ship in one of two ways: either it is lifted over the stern by a high-capacity shipboard gantry crane, or the ship is partially submerged so that the barges can be floated aboard via a gate in the stern.
Aboard Ship. It is a specialized container ship carrying very large floating containers, or "lighters." The ship carries its own massive crane, which loads and discharges the containers over the stern.
Passenger ships are vessels that carry passengers either on an overnight cruise or day only cruise.
Many universities, oil companies, water resource boards and governments own and operate research ships. Small research ship may provide platforms for any type of oceanographic endeavor and the large research ships
Fast Ship Pentamaran container ship
Surface-Piercing (Left) & Fully-Submerged (Right) Foil Configurations