A convenient interactive structural design system (ISSMID), which consists of a structural arrangement module, a scantling module, and an interface module, has been developed for the optimum design of double-hull oil tankers. The structural arrangement module defines the configuration and properties of the longitudinal, transverse, and transverse bulkhead members. The scantling module determines the scantling of the longitudinal, transverse, and transverse bulkhead members to obtain the minimum structural weight and fabrication cost. The interface module generates the data for the structural analysis (ANSYS/NASTRAN) and the CAD system (TRIBON/AUTOKON). This paper describes a new structural cost model developed by considering welding technique, welding poses, and assembly stages to manage the fabrication man-hour and process. Also, a multi-objective function method (random search method) is developed to find the minimum structural weight and fabrication cost. Several optimum structural designs are produced based on the Pareto optimal set obtained by the random search method. The design results are compared with existing ships.

This content is only available via PDF.
You can access this article if you purchase or spend a download.