Generation of production material information for a building block and simulation of block erection for process planning and scheduling in shipbuilding

Abstract

At the initial process planning and scheduling stage of a ship, the generation task of the production material information of a building block and the simulation task of the block erection have been manually performed using 2D drawings, etc. To make these tasks automatic, an accurate generation method for the production material information and a convenient simulation method for block erection using a 3D CAD model are developed in this study. For this, a 3D CAD model for a whole hull structure is generated first, and the block division method for dividing the 3D CAD model into a number of building blocks is then developed using the relationship between the hull structural parts. A generation method for the production material information for calculating the weight, etc., of a building block is developed. A simulation method for block erection is also developed using the composition and erection sequence information of erection blocks. Finally, to evaluate the developed methods, these methods are applied to corresponding processes of a deadweight 300 000-ton very large crude oil carrier. As a result, it is shown that the production material information can be accurately generated and the block erection can be conveniently simulated at the initial design stage.