Development of a hull form definition tool with a related knowledge-based advisory system |
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Authors: | Glenn D Aguilar Hiroyuki Yamamoto Takeo Koyama |
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Institution: | (1) Research into Artifacts, Center for Engineering, University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153 Tokyo, Japan;(2) Department of Naval Architecture and Ocean Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113 Tokyo, Japan |
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Abstract: | The development of a parametric hull form design system utilizing combined knowledge-based and objectoriented methodologies,
approaches, and techniques is the major purpose of this research. One objective was the development of a powerful, intuitive,
and parameter-based hull definition system with a related hull definition advisory system that would provide useful and necessary
advice to the user. Object and knowledge modeling activities were conducted during the analysis and design stage to facilitate
the implementation of a hull design program and advisory system. The hull design system includes the generation of a geometric
model from a process of aggregating simple user-selected shapes representing different boundaries. Design involves the capability
to vary simple parameters such as entrance angles, length-breadth ratios, and radii to define local and general surface geometries.
Hydrostatic calculations are included for analysis; results are referred to an advisory system for evaluation and the determination
of the acceptability of parameters and analysis results. The advisory system includes a knowledge bases consisting of hull
form databases, results of the statistical analysis of data, design parameter constraints, and expert knowledge acquired from
designers, reference materials, and technical reports. Use of the design tool with the advisory system results in the rapid
generation of hull forms and associated design evaluations. Flexibility in decision making results from the separation of
the design system from the advisory system. The independence of the two systems allows for a wide range of user experience
with experts using the design tool with minimal reference to the advisory system. On the other hand, the expertise and knowledge
stored in the advisory system is fully available to inexperienced designers and users. |
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Keywords: | hull form design knowledge-based system knowledge modeling |
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