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고창두(Chang-Doo Koh),김현철(Hyun-Cheol Kim),김수영(Soo-Young Kim) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.4
Robust design developed by G.Taguchi is an efficient and systematic methodology that applies statistical experimental design for improving product and manufacturing process design. This paper describes the robust design using genetic algorithms instead of orthogonal array. Also, we apply the robust design methodology to a high-speed planing hull and verify usefullness of this methodology by comparing the results of optimal technique and this methodology.
재화중량 150,000톤 산적화물선의 초기 로버스트 설계
고창두(Chang-Doo Koh),김수영(Soo-Young Kim) 한국해양공학회 1999 韓國海洋工學會誌 Vol.13 No.4
The robust design technology which can determine design variables getting best performance function with insensitivity to the environment noise, is an important method for improving the performance of products at low cost. Applying the robust design technology in ship design, Koh et al[10] introduced the planing hull design. This paper reports the application this technology to a 150K bulk carrier which has many design variables and shows that the robust design technology is superior to optimization technique in practical use.
연안 소형선박내의 소음 및 진동에 기초한 선상근무 환경의 평가
고창두(Chang-Doo Koh),김상현(Sang-Hyun Kim) 한국항해항만학회 2003 한국항해항만학회지 Vol.27 No.1
연안 경비함정의 선상근무 환경은 육상근무 환경에 비하여 매우 열악하여 선상근무 기피와 선원 고령화의 원인이 되고 있다. 특히 선박내 소음은 난청과 같은 직업병을 유발시키는 원인이 된다. 따라서 안락한 선상근무 환경 및 거주 환경의 확보를 통하여 선상근무 피로도를 경감시키는 것이 필요하다. 본 연구에서는 먼저 선박내 소음 및 진동의 실선 계측을 통하여 선상근무 환경을 체계적으로 평가한다. 그리고 선상근무 환경의 평가 결과에 기초하여 선상근무 피로도 경감대책을 제안한다. The shipboard working environment of coastal patrol ship is very inferior to the ground working environment and it causes the avoidance of shipboard working and the aging of crew. Especially the noise in ships causes an occupational disease such as hardness of hearing. Hence to reduce the shipboard working fatigue is necessary by the security of the comfortable shipboard working environment and residence environment. In this paper, firstly we evaluate the shipboard working environment by using the measurement results of the shipboard noise and vibration in the sea. And we propose the measures to reduce the shipboard working fatigue which is based or, the evaluation results of the shipboard working environment.
안창구,고창두 해양환경안전학회 1995 海洋環境安全學會誌 Vol.1 No.1
In this paper, a program for the calculation of GZ curve for a ship in waves is developed and GZ curves for a ferry in the still water and in waves are calculated. And the added mass, damping, restoring forces and wave exciting forces are calculated by using the strip theory given by Salvesen, Tuck, Faltinsen. Capsizing simulations are perfoned in consideration if the nonlinear restoring forces of the ship in waves by using the Runge-Kutta 4-th method.