22-06-2013, 12:34 PM
INTRODUCTION TO SHIP TECHNOLOGY
SHIP TECHNOLOGY[.ppt (Size: 3.95 MB / Downloads: 54)
Introduction- Evolution of Shipbuilding
In early days to hollow out from the logs and the small boats made from reeds and grasses.
These small boats where the fore runners of ship travel over the oceans before iron could be processed into steel plates and bars.
Timber was the only building material that could be used to build the ship.
Timber was used build ancient vessels that were initially rowed on large rivers and around coastal areas and relied on wind power as propulsion.
When wind power was used and sails were used to run the ship. Then man was able to cross oceans for the first time.
Wooden ships has became a bigger sails and wooden ship became more complex and for the first time sea trade between countries flourished.
When steel was being used in shipbuilding the shipyards had to have skilled workers.
In early days riveting was the only method of connection the plates;
In this method has made shipbuilding a slow and laborious process.
Workers salary was low so ship building became very labour intensive.
Thousands of people will work in one shipyard to construct a vessel which takes a longer period of times to complete the ship.
ADVANTAGE OF USING WELDING METHOD IN SHIP BUILDING.
The use of welding method lead to a new methods of ship construction.
Shipyard has the ability and benefit of building sections of the ship in various locations around the yard and finally bringing them together to form a ship.
Welding method will give the strength of the ship as welding is as strong as the steel plate itself.
The welded ship is stronger and more economical to build.
Build Plan
Within the shipbuilding strategy, the structural engineering and production planning departments decide on the method of construction, commonly known as the Build Plan.
The build plan is a planning document of cost effective manufacture and assembly. It defines the order in which components, sub-assemblies, assemblies, units and modules move into production of components for the whole ship.
Work is subdivided into logical order. i.e. products to be manufactured, progressing from components to sub-assemblies, assemblies, units and modules.
Hull fit-out (piping, engine, electrical)
The hull is fitted out with items, which include
engine room components,
piping,
electrical work
and accommodation.
Units of machinery, pipe work and other outfit systems such as electrical and accommodation, which are required for a specific zone, can be planned and built up into modules and installed into a block fabrication.
Superstructure blocks are fabricated separately and pre-outfitted with accommodation before erection as a complete unit.
Piping systems, ventilation, electrical, engine and machinery units are fitted into the erected hull as independent items.