The Local Transformation of the Catamaran―stern Hull.docVIP

The Local Transformation of the Catamaran―stern Hull 　　【Abstract】Lines plan of a ship related to resistance，structural strength，and economic benefit，is a complicated system engineering.Especially for the catamaran-stern hull，the designers have to modify the lines plan of the ship，in order to combine the catamaran-stern with the main ship hull.This paper use trigonometric function method to achieve the local transformation of catamaran-stern hull；on the other hand，making it programmed can effectively shorten the cycle of shipbuilding. 　　【Key words】Local transformation；Catamaran-stern hull；Trigonometric function 　　0 Introduction 　　In ship design，lines have a relation with the float state of structure， rapidity and stability of the ship，Seakeeping、maneuverability、load capacity and internal layout.Ship design is a complex process，each part is the system of independent design，and has a close relationship between each other，the overall design work is done by a variety of professional cooperation coordination，so in the design process will inevitably conflict； And sometimes in order to improve the performance of the vessel，such as raising the output，increase the structural strength and so on，these need to ship design personnel on the basis of the existing ship lines type line of partial adjustments，in order to meet the requirements of design and use.[1] 　　In this paper，the trigonometric function is used to realize the ship lines of partial transformation.Through this thesis，we can achieve partial transformation of the ship any direction，and keep the length and breadth of the ship principal dimensions remains the same. 　　This method is essentially a kind of transformation of the mother ship.In the transformation of the mother ship，often as a result of the need of design，to change the ship type line of a certain position，but still want to keep the ship modalities lines fairing，if there is no appropriate method， need to make a lot of changes to your lines.By means of