Optimisation of the design of a steel-welded pressure hull structure based on interactive nonlinear collapse strength analyses. (2nd January 2022)

• Record Type: Journal Article
• Authors: Muttaqie, Teguh; Park, Sang Hyun; Cho, Sang-Rai; Sohn, Jung Min
• Is Part Of: Ships and offshore structures. Volume 17:Number 1(2022)
• Page Start: 76
• Page End: 91
• Publication Date: 2022-01-02
• Subjects: Genetic algorithm -- optimal design -- steel-welded pressure hull -- ring-stiffened cylinder -- ultimate strength -- non-linear FEA; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2020.1816770
• Languages: English
• ISSNs: 1744-5302

Abstract

ABSTRACT: In this study, the genetic algorithm (GA) was implemented for the multi-objective optimization of the structural design of a pressure hull. The objective functions sought the maximum ultimate strength of the ring-stiffened cylindrical shell structure with minimum structural weight and maximum volume of the configured structural member. First, the evaluation models of several design variables of submarine structures were studied. Subsequently, a multi-objective GA algorithm was introduced. To improve the quality of the new population, several design constraints are applied. The final candidate structures were recomputed by non-linear finite element analysis (FEA) to observe the failure modes and compared with the initial design model. The results suggest that a lightweight construction would be achieved when a material with higher strength is used, especially for greater design depths