Selasa, 30 April 2013

and more awesome assignment


I was given an assignment from my teacher name Sir Rahat Aziz on 20 april 2013. The title of the assigment is Transverse bending. 

Transverse bending


The transverse structure of a ship is subject to three different types of loading:
·        Forces due to weights of the ship structure, machinery, fuel, water and cargo.
·        Water pressure plus forces due to wind and waves plus machinery motion.
·        Forces created by longitudinal bending.

The deck must be designed to support the weight of accomodation, winches and cargo. While exposed decks may have to withstand a tremendous weight of water shipped in heavy weter. The deck plating is connected to beams which transmit the load to longitudinal girders and to the side frame.
In machinery spaceother factors must be taken into account. Forces of pulsating nature are transmitted through the structuredue to the general out balance forces of machinery parts. The machinery seats must be extremely well supported to prevent movement of the machinery.
A considerable force is exerted on the bottom and side shell by the water surrounding the ship. The double bottom floors and sides frames are designed to withstand these forces, while the shell plating must be thick enough to prevent bucking between the floor and frames. Since water pressure increased with the depth of immersion, the bottom shell must be thicker than the side shell.
When the ship passes through waves, these forces of pulsating nature and may vary considerably in high waves, while in bad weather conditions the shell plating above the waterline will receive severe hammering

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