The Research On Production Organization Based On Virtual Flow Line In Ship Curved Segments

In shipbuilding, the manufacture of sub-blocks takes more than one third time of thetotal ship construction process. It is very important to shipbuilding efficiency. According tothe principles of the ship sub-division, hull divides into flat and curved segments. Becauseof the large number and similar, advanced shipyards often produce the flat segments in theway of flow line. And because of the small number and the differences, the curved segmentsare hard to use flow line production, In most of the domestic shipyards, curved segments areproduced on stationary steady in the way of a non-flowing line. The production efficiency islow. So, it has important significance studies the problem of production organization ofcurved segments.One shipbuilding company in Nantong as the object of study, this paper analyzes thesituation of curved segments: Work teams are divided by single type of work；Work teamsare dispatched by team leader’s experience; the movable equipments are confusion, someimportant equipments as crane are used confusion, when several curved segments need touse them, it is hard. This paper establishes a production organization accord to thecharacteristics of curved segments: this paper builds a virtual flow line with the principle ofvirtual flow line and shipbuilding group technology, and briefly comments on five keyissues to carry out the virtual flow line, such as the formation of operating work teams,production time, the assignment of work teams, the resolution method when equipments orresources conflict and the layout of curved segments. This paper sets up a multi-functionalmachine hybrid flow-shop scheduling problem model (MFMHFSP) and a more efficientscheduling algorithm-hybrid particle swarm optimization (HPSO) is proposed to solve theproblem.The virtual flow line production organization has same important significance for largeand heavy products, such as planes and bridge.