Sang-Uk Cheon

A Method for Translating Pipe Models from Aveva Marine to SmartMarine3D

Received 30 May, 2013; received in revised form 27 June, 2013; accepted 17 July, 2013ABSTRACTAt shipyards, to enable design cooperation with engineering companies or to meet ship owner’srequirements, there is a need to translate ship models from one ship CAD system to anothership CAD system. In this paper, a method for translating pipe models from Aveva Marine toSmartMarine3D is introduced. Related data and architecture of translation system are addressedand specific details to be considered during translation are explained. The introduced methodhas been implemented and tested in a shipyard.Key Words: Aveva marine, CAD translation, Pipe model, Ship CAD, SmartMarine3D

Development of a Similarity Evaluation System for Offshore Plants` 3D Piping CAD Models Created Using Aveva Marine and SmartMarine 3D

해양 플랜트의 설계·건조·운전 과정에 참여하는 다수의 이해관계자들은 일반적으로 서로 다른 플랜트 3D CAD 시스템을 사용한다. 그리고 플랜트 설계 및 건조 업체는 플랜트 주문주에게 설계 결과물로 계약서에 명시된 형식의 플랜트 3D CAD 모델을 납품해야 한다. 그러나 플랜트 3D CAD 시스템에서 제공되는 데이터 교환 기능의 제약으로 인해서 플랜트 설계 및 건조 업체는 많은 경우 계약서에 명시된 형식에 맞게 해양 플랜트 3D 모델을 수작업으로 다시 모델링을 하여 납품한다. 따라서 수작업으로 리모델링된 3D CAD 모델의 정확도를 검증하기 위해 원본 플랜트 3D CAD 모델과 재모델링된 플랜트 3D CAD 모델간의 비교를 해야 한다. 이를 위해 해양 3D CAD 모델의 유사도를 정략적으로 평가하는 시스템을 개발하였다. 이 논문에서는 시스템의 구조 및 세부 기능을 설명한다. 그리고 비교 시스템을 이용한 실험 결과에 대해서 설명한다.

Development of a Fuzzy Rule-based Decision-making System for Evaluating the Lifetime of a Rubber Fender

If a rubber fender, whose purpose is to absorb the shock energy that is generated when a ship is berthing, fails because of deterioration and vulcanization, the ship and the pier structure may incur serious damage. In this paper, we introduce a fuzzy rule-based decision-making system to predict the maintenance timing of rubber fenders by diagnosing their faults and evaluating their lifetimes on the basis of the knowledge and experience of experts. First, we built a case library containing information concerning fender lifetimes and points in these lifetimes when faults occurred. This was gathered on the basis of the results of testing the lifetime of rubber materials under accelerated conditions and a knowledge base of the physical properties of fenders in order to evaluate the deterioration in a rubber fender. Moreover, after representing the key factors affecting the deterioration of rubber fenders as a fuzzy cognitive map that reflects the knowledge and experience of domain experts, we drew inferences regarding the heuristic factors of the lifetime of rubber, the conceptual centrality of which is relatively high according to the cause-and-effect relationship between key factors. Finally, we propose a diagnostic process for the performance deterioration of rubber fenders based on the various factors that affect the lifetime of rubber and its multiple physical properties in the form of a decision-making tree. We then applied it to rule-based and case-based reasoning. Copyright

Counter-Deformed Design of Ship Structural Parts Using Geometric Shape Deformation Based on Welding Distortion Estimation

We introduce a method to design manufacturing shapes of ship plate parts that considers weld-induced deformation. The design shape of a bracket is counter-deformed by a pure geometric method. Deformation quantities are estimated based on data captured in the field, and a manufacturing design shape is obtained by counter-deforming an original design shape by the proposed geometric deformation method.

Development of Procedural 2D CAD Data Translator Supporting ISO 10303 STEP

Procedural models have the advantage of being easy to edit simply by changing the values of the parameters of their constructional operations. In previous studies, we have introduced an approach for representing procedural 2D CAD models in ISO 10303 and developed ISO 10303-112 for the exchange of procedural 2D CAD models. In this paper, a method for the development of a procedural 2D CAD data translator supporting ISO 10303-112 is suggested. Furthermore, the core techniques applied to the translator are presented. The feasibility of the proposed method was demonstrated through data exchange experiments using a prototype translator.

Requirement Analysis on Lightweight CAD Models in Ship PLM Environment and Its Application Examples

Introduction of PLM in domestic shipyards is being retarded as ship PLM has yet to firm up return of investment and process integration. To implement a ship PLM system, it is required to share ship CAD model data in various design and manufacturing environments. Lightweight CAD models provide a promising solution for sharing CAD models in the product life cycle, which can expedite implementation of ship PLM in domestic shipyards in the near future. Compared to proprietary CAD models, it is easy for lightweight CAD models to be interfaced with various application systems and be connected to manufacturing information. In this paper, the reason why lightweight CAD models are necessary to implement a ship PLM system is addressed and current implementation results are introduced.

A Method for Visualizing a Large JT File of Ship Blocks in an Android Device

In shipbuilding, 2D manufacturing drawings are crucial for building a ship. Even various types of 3D models are being utilized for supporting ship manufacturing, which does not reduce the importance of 2D drawings. Recently things are changing in the shipbuilding industry. To reduce the number of 2D drawings or to reduce the quantity of information contained in 2D drawings, some attempts that can substitute for 2D drawings are being made. One of the attempts is to visualize lightweight 3D manufacturing models in a mobile device. In this paper, a method for displaying lightweight 3D models of a ship in an Android based device is introduced. To overcome the problem with parsing JT files in Android system, JT files are parsed in a Windows based server and as-simple-as-possible visualization data are transmitted to an Android based viewer. A comparison result with a commercial system is also given.

Counter-deforming Method for a Bracket Design of a Ship Via Geometric Shape Deformation

A method of designing a manufacturing shape of ship plate parts considering welding deformation is introduced. In this paper, the design shape of a bracket is deformed not by a thermoelastic method but by a pure geometric method. Deformation quantities are estimated based on data captured in the field and then a manufacturing design shape is obtained by deforming an original design shape by a geometric deformation method. The proposed method has been implemented and tested in the shipyard.