Numerical Design Optimization of Mooring Dolphin of Steel Pile Type

J. Ocean Eng. Technol. 1999;13(3):3-11.

Lee, Na-Ry;Ryu, Yeon-Sun;Kim, Jeong-Tae;Seo, Kyung-Min;Cho, Hyun-Man;

강관말뚝식 계류돌핀의 수치적 설계최적화

이나리;류연선;김정태;서경민;조현만;

한국해양연구소 선박해양공학분소;부경대학교 해양공학과;부경대학교 해양공학과;동해대학 토목과;부경대학교 해양공학과;

Keywords: Mooring Dolphin, Numerical Design Optimization, Design Variable Linking and Fixing

핵심용어: 계류돌핀, 수치적 설계 최적화, 설계변수의 연계 및 고정

Abstract

Optimum design of mooring dolphin is numerically investigated. Design optimization problem of moring dolphin is first formulated. Geometry and cross sections of piles are used as design variables. Design objective is the total weight of steel piles of mooring dolphin, and the constraints of stress, penetration depth, lower and upper bounds on design variables are imposed. Based on the design variable linking and fixing, several class of design variations are sought. For the numerical optimization, both PLBA(Pshenichny - Lim - Belegundu - Arora) program and DNCONF subroutine code in IMSL library are used. For a dolphin structure with 20 steel piles, vertical and inclined, optimum designs for different cases are successfully obtained, which can be applied for the mooring of a very large floating structure.