Numéro : 2164 - Year : 1991
Preliminary results from an expert system for fishing vessel design
Prof. S.M. CAUSAL, DEPARTMENT OF MECHANICAL ENGINEERING,
UNIVERSITY OF BRITISH COLUMBIA, VANCOUVER, BC, CANADA
D. McGREER, DEPARTMENT OF MECHANICAL ENGINEERING, UNIVERSITY OF BRITISH COLUMBIA, VANCOUVER, BC, CANADA
An expert system has been developed to aid naval architects in the design of fishing vessels. The expert system is intended to assist the designer through the design spiral for the vessel. The expert system incorporates knowledge from existing vessels, government regulations and classification rules with convention al design software such as resistance estimation programs and propeller selection programs.
The expert system is based on the UBC Seiner Series. Algorithms have been developed for estimating resistance in light and loaded condition, for stability and for added resistance in waves. The stability of UBC series, based on the IMO statistical criteria. was found to have higher maximum allowable center of gravity than the BSRA Trawler Series.
Preliminary investigations with the expert system have shown that aluminium fishing vessels can have lower construction costs than steel vessels of the same hold capacity. The relative merits of aluminium and steel are found to be a function of length. Small vessels are less costly when constructed of aluminium whereas larger vessels are less expertsive when constructed of steel. The expert system allows the fishing vessel designer to easily evaluate which material is more suitable for each new vessel designed.