제품데이터품질(PDQ) 평가에 따른 함정 제품모델의 형상 품질검증 자동화 초기 시스템

오대균,황인혁,류철호,이동건,Oh, Dae-Kyun,Hwang, In-Hyuck,Ryu, Cheol-Ho,Lee, Dong-Kun 해양환경안전학회 2014 해양환경안전학회지 Vol.20 No.1

우리 해군은 함정 제품모델(Naval Ship Product Model, NSPM)을 중심으로 하는 협업 제품개발 환경 구축을 통해 설계 데이터의 재사용성과 M&S의 활용도를 높이고 있다. 그 결과 설계결과의 신뢰성이 높아지고 있으며, 이를 활용한 운영, 건조 시뮬레이션을 통해 소요군의 요구사항이 면밀히 반영되도록 하는 연구도 진행 중에 있다. 이에 따라 설계 데이터의 DB 구축 및 그 품질에 대한 중요성이 부각되고 있으나, 그와 관련된 연구는 초기상태에 머물러 있는 실정이다. 본 연구에서는 저자들의 선행연구 결과인 함정 제품모델의 품질검증 방법론에 기초하여 함정 제품모델을 구성하고 있는 형상요소의 구체적인 품질검증 방안과 이를 자동화하기 위한 연구를 수행하였다. 함정 제품모델 데이터 중 상대적으로 중요하며, 검증과정에 많은 시간이 소요되고 있는 선각모델을 사례연구 대상으로 정의하였으며, 자동차산업에서 사용되고 있는 제품데이터품질(Product Data Quality, PDQ)을 형상검증 기준으로 활용하였다. 최종적으로 선각모델의 형상 품질검증을 위한 기준과 알고리즘을 제안하였으며 이에 기반 한 초기 시스템을 개발하였다. Recently, R.O.K. Navy is increasing re-usability of design data and application of M&S(Modeling and Simulation) through the establishment of collaborative product development environment focused on Naval Ship Product Model(NSPM). As a result, the reliability of the result of design is getting better, and furthermore, a study to improve quality of construction through simulation of production/operation is in progress. Accordingly, the database construction of design data and the DB(Database) quality become important, but there was not research related to those or it was just initial state. This paper conducted research about system of the quality verification process of shape elements which compose NSPM based on the quality verification guideline of NSPM as the result of the precedent study. The hull surface was limited as verification object. The study to verify two things that application of basic drawing by the cad model of hull surface, and whether there is error in the geometric quality of cad model was progressed. To achieve this goal, the verification criteria and algorithm were defined and the prototype system which is based on was developed.

교토의정서의 발효가 산업계에 미치는 영향과 대응방안

오대균 한국시멘트협회 2005 시멘트 Vol.166 No.-

교토의정서 발효와 우리의 자세

오대균 한국가스학회 2005 한국가스학회 학술대회논문집 Vol.2005 No.5

직사각형 형상의 표면조도 변화에 의한 난류변동분 해석

오대균,오우준,김도정,이경우,Oh, Dae-Kyun,Oh, Woo-Jun,Kim, Do-Jung,Lee, Gyoung-Woo 해양환경안전학회 2011 해양환경안전학회지 Vol.17 No.2

표면조도에 의해 발생하는 난류유동은 공학적, 물리적 분야에서 매우 중요하게 다루어지고 있다. 표면조도는 선박에서도 설계, 용접, 도장 등 각각의 단계에서 다양한 측면으로 고려되어야 할 중요한 요소이다. 본 연구는 표면조도 형상을 일반화하여 PIV기법을 적용하여 수조실험을 수행하였다. 표면조도 조건은 거칠기 형상의 간격에 대해 변화를 주었으며, 실험유속은 Re = $1.1{\times}10^4$, Re = $2.0{\times}10^4$, Re = $2.9{\times}10^4$ 에서 시간평균에 대한 난류강도를 알아보았다. 거칠기 계수 증가에 따라 표면 거칠기 형상 근처에서 발생한 난류성분에 의해 난류강도는 강하게 나타났으며, 자유흐름 영역으로 갈수록 유동 방향의 변동이 전혀 없는 흐름이 나타났다. 실험유속 조건 변화에 대한 난류강도의 편차는 크게 영향을 받지 않았다. In physical engineering, the turbulent flow on the surface roughness is very important. With the welding, design and paint, the hull surface roughness at each stage in the various aspects are important factors to be considered. In this study, the hull surface roughness geometry that was generalized to the PIV was applied to the tank test. The roughness of the surface changed the distance of the interval. Experimental velocity is Re = $1.1{\times}10^4$, Re = $2.0{\times}10^4$ and Re = $2.9{\times}10^4$. The turbulent intensity at the time-average were examined The roughness coefficient occurred with increasing turbulence intensities was stronger. The turbulence intensity away from the roughness in the shape was zero. The variation of turbulence intensity at the experimental flow conditions change was not affected.

기후변화협약, 파리협정의 의의와 준비

오대균 대한전기협회 2019 전기저널 Vol.- No.512

Improving the Design Process of Pleasure Yachts for CE RCD Certification via Modification to Buoyancy and Stability Assessment Method

오대균,이창우 해양환경안전학회 2017 海洋環境安全學會誌 Vol.23 No.3

CE RCD (Recreational Craft Directive) is a certification for the design and construction of small vessels, including pleasure yachts, which are widely used not only in the countries within the European Union, but also in Japan and Southeast Asia. Recently, South Korean leisure craft shipyards have developed interest in exporting to foreign leisure craft markets such as Europe; however, they have encountered difficulties because of the CE RCD regulations, which are relatively complex and difficult to understand. The requirements for buoyancy and stability, which are essential properties that must be understood within the early stage of ship design, are defined based on ISO 12217. However, preparing this assessment according to ship classification regulations is an exceedingly complex task, even with knowledge of naval architecture. In this research, we have developed design support tools to systematically support assessments and preemptively define design information so that buoyancy and stability assessments based on ISO 12217 can be systematically prepared. Our research results were applied to actual examples of yacht design to confirm validity. We believe that the improved yacht design process presented in this research can act as a foundational reference for enhancing the effectiveness and systematic buoyancy and stability assessments.

레저선박의 국제인증과 ISO 표준 개요

오대균,이동건 해양환경안전학회 2014 해양환경안전학회 학술발표대회 논문집 Vol.2014 No.06

Effects of fabric combinations on the quality of glass fiber reinforced polymer hull structures

오대균,장재원,Jee Jae-hoon,Kwon Yongwon,Im Sanghyuk,HANZHIQIANG 대한조선학회 2022 International Journal of Naval Architecture and Oc Vol.14 No.1

Conventionally, Chopped Strand Mat (CSM) and Woven Roving Mat (WRM) fabrics are combined to manufacture Glass Fiber Reinforced Polymer (GFRP) laminate structures for small vessels, such as fishing boats and yachts, according to established practical experience and traditional methods rather than the application of elaborate design rules. Combinations of the aforementioned fabrics positively contribute to improve the strength of hull structures. In this study, effects of fabric combination types on the quality of GFRP structures such as hull plates are quantitatively verified through experiments and statistical analysis. The results confirm the following: (1) hull plates fabricated by combining CSM and WRM exhibit enhanced strength in the normal glass fiber weight fraction (Gc) regions with an E-glass fiber content of 30e50%, and (2) the effect of reducing the amount of decrease in the strength is observed in high-Gc regions with an E-glass fiber content of 50% or higher. Furthermore, a combination of these fabrics demonstrated a significant effect in improving the quality of the composite laminates owing to a reduction in void defects in the hull plates.

기후변화협약에 대한 정부 대응 정책

오대균 한국환경경영학회 2005 한국환경경영학회 학술대회 Vol.2005 No.-

디지털 목업 모델 기반 40ft 급 알루미늄 레저보트 설계

오대균,이경우,이창우,Oh, Dae-Kyun,Lee, Kyung-Woo,Lee, Chang-Woo 해양환경안전학회 2011 海洋環境安全學會誌 Vol.17 No.3

레저선박의 대형화와 고부가가치화로 인해 설계 요구조건은 점차 까다로워지고 있으며, 제작공정 또한 기존보다 복잡해지고 있다. 해외의 레저선박 제작업체들은 PLM 개념 기반 3차원 모델 설계시스템 구축을 통하여 이러한 환경을 극복하기 위해 노력하고 있다. 반면 국내의 경우 아직까지 2차원 도면 중심의 전통적인 레저선박 개발 프로세스에 머물고 있으며, 일부 3차원 모델 기반 설계시스템을 갖추기 위한 노력이 있었으나 이는 매우 초기단계에 속한다. 본 연구에서는 DMU 기술을 레저선박 설계 프로세스에 적용하기 위한 초기연구를 수행하였다. DMU 모델 중심으로 레저선박 설계를 수행함으로써 DMU 모델 기반 설계 프로세스를 정립하였고, 40 ft급 알루미늄 레저보트 설계사례를 통해 그 효용성을 입증하였다. As leisure boats become large-scaled and high value-added, their design requirements gradually get more complicated and accordingly their manufacturing processes get more complicated than those of existing ones. Leisure boat builders overseas make efforts to overcome this circumstance by establishing a 3-D model-based design system which is based on the concept of PLM. On the other hand, Korean shipbuilders still remain in the development process of traditional leisure boats which are mainly based on 2-D drawings. There have been some efforts made to have the 3-D model-based design system; however, they belong to a very early stage. This study carried out initial research to apply DMU technology to the development process of leisure boats. It established the design process based on a DMU model and proved its usefulness through a case study on the design of 40-ft class aluminum leisure boats.