• Journal of Navigation and Port Research
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• v.26 no.1
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• pp.50-54
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• 2002

The plate bucking is very important design criteria when the ship is composed of high tensile steel plates. The structures under the action of excessive exhibit local failure associated with bucking until they reach the ultimate limit state as a whole. Precise assessment of the behaviour of plate above primary buckling load is important. In this connection, series of elastic plastic large deflection analyses are performed on rectangular plates with aspect ratio 1.4 applying the finite element method. In this paper, the buckling/plastic collapse behavior of ship plates with secondary buckling is investigated. It has found that the other deflection componentes also increase with the increase of compressive load above the primary buckling load.

• Proceedings of the KWS Conference
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• 2000.10a
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• pp.164-165
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• 2000

• Proceedings of the KWS Conference
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• 2002.05a
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• pp.133-135
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• 2002

• Proceedings of the KWS Conference
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• 2001.05a
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• pp.86-89
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• 2001

• Bulletin of the Society of Naval Architects of Korea
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• v.26 no.4
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• pp.57-66
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• 1989

In this paper, a theory for the static analysis of large plastic deformations of 3-dimensional frames, aiming at application to the collapse analysis of ship structures, is presented. In the frame analysis formulation, effects of shear deformations are included. A plastic hinge is inserted into the field of a beam end, and post. failure deformation of the plastic hinge is characterized by finite rotations and extensions. In order to model deep web frames of ship's structures into a framed structures, collapse of thin-walled plate girders is investigated. The proposed analysis method is applied to several ship structural models in the references.

• Journal of the Society of Naval Architects of Korea
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• v.28 no.1
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• pp.1-11
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• 1991

When a geometric modeling of a hull form for ship design and hull production is done, a hull fairing is a tedious process which wastes a lot of time, but it is unavoidable because hull consist of the sculptured surfaces. This paper presents the mathematical method of the direct fairing to overcome the tediousness of cross fairing. Bi-cubic B-spline surface description was adopted for the representation of the hull surface. The fairing process was executed by minimizing the strain energy in a shell plate. The color-encoded Gaussian curvature and strain energy were visualized on the screen to illustrate the fairness of the surface. The geometric information generated from the faired hull surface model was interfaced with the basic design calculation package and the hull production system.

• Journal of Advanced Marine Engineering and Technology
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• v.33 no.1
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• pp.28-36
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• 2009

In this paper, based on the measured data of hull deflection, an approximated hull deflection curve is drawn using reverse analyzed hull deflection data and the estimation method for flexibility analysis of shaft alignment is proposed by use of the approximate hull deflection curve. Generally an offset value of after stern tube bearing is a datum point with an fore stern tube bearing however the shaft alignment has a tendency which is able to get higher flexibility if the shafting system has the deflection value from after stern tube bearing as reference to bottom direction according to results of on this study. By applying this result of study, the shaft alignment for next similar ships will be able to estimate how to follow the hull deflection and how to be influenced by hull deflection at shaft alignment analysis state using the approximated hull deflection curve.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.39-44
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• 2006

현재 조선산업은 선박의 대형화 추세에 맞추어 선체블록 규모가 대형화되고 있다. 따라서 대형 선체블록제작을 위한 블록전문업체가 증가하고 있으며, 그에 따른 블록조립 및 정도계측기술 개발이 절실히 요구되고 있다. 이에 본 연구에서는 그간 수행해온 블록계측과 관련된 각종 데이터베이스를 구축하고, 시스템 기능구현에 핵심 기술인 소프트웨어 개발 기법, 정보 가시화 기법을 제시하고 이를 이용한 인터페이스를 개발하여 본 시스템의 구성요소를 유기적으로 연결하여 사용하는 과정을 시연함으로써 블록조립 정도평가 시스템의 유용성과 기능을 검증하였다.

• Proceedings of the KWS Conference
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• 2003.05a
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• pp.244-246
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• 2003

• Proceedings of the KWS Conference
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• 2001.10a
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• pp.274-276
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• 2001