Abstract
This chapter presents a parametric modeling approach to the design of ship hull forms, which allows one to create and vary ship hulls quickly and efficiently. A design-oriented parametric definition language is introduced that features high-level descriptors of hull characteristics well-known in naval architecture. Three prominent levels of topology are introduced—topology of appearance, topology of design, and topology of representation. These levels serve to characterize more clearly the various stages of specification, Definition, and realization typical of today's ship design process, comprising the complete spectrum from the abstract description to the mathematical detail. The new modeling approach is placed at the intermediate level of topology of design that produces a complete mathematical description of the hull via geometric optimization, enabling effective shape variations by keeping selected parameters constant while adjusting others automatically. Form parameters are utilized as the descriptors to express design ideas. All curves and surfaces yield excellent fairness. Examples illustrate parametric shape design and variation. Thus, the parametric modeling approach provides the ideal basis to hydrodynamic optimization and one week ship design.
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