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관계형 데이터베이스를 이용한 PDMS / PDS의 통합 데이터 모델링에 관한 연구
양영태(Young-Tae Yang),김재균(Jae-Guen Kim) 한국해양공학회 1997 韓國海洋工學會誌 Vol.11 No.3
Most recently, Offshore Engineering & Construction field is concerned about integration management technology such as CIM(Computer Integrated Manufacturing), PDM(Product Data Management) and Enterprise Information Engineering in order to cope with the rapid change of engineering and manufacturer specification as per owner’s requirement during construction stage of the project. System integration and integrated data modeling with relational database in integration management technology improve the quality of product and reduce the period of the construction project by reason of owing design information jointly. This paper represents the design methodology of system integration using Business Process Reengineering by the case study. The case study is about the offshore plant material information process from front end engineering design to detail engineering for the construction and the basis of monitoring system by integrating and sharing the design information between the 2D intelligent P&ID and 3D plant modeling using relational database. As a result of the integrated data modeling and system integration, it is possible to maintain the consistency of design process in point of view of the material balancing and reduce the design assumption / duration. Near future, this system will be expanded and connected with the MRP(Material Requirement Planing) and the POR(purchase Order Requisition) systems.
양영태(YOUNG-TAE YANG),최문길(MOON-GIL CHOI),이춘보(CHOON-BO LEE),박병남(BYONG-NAM PARK),성석부(SEOK-BU SEONG) 한국해양공학회 2003 韓國海洋工學會誌 Vol.17 No.2
This paper presents the design concept and operation results of float-off for FSO (340,000 DWT Class, ELF AMENAM KPONO Project) built on the ground, without dry dock facilities. It was the first attempt to build FSO, completely, on the ground and launch it using DBU (Double Barge Unit, which was connected by rigid frame structure.) The major characteristics of FSO, which are similar to general VLCC type hull, including topside structure, weigh 51,000 metric ton. In order to have sufficient stability during the deck immersion of DBU, while passing through a minimum water plane area zone, proper trim control was completed with LMC (Load Master Computer). The major features of the monitoring system include calculation for transverse bending moment, shear force, local strength check of each connector, based on component stress, and deformation check during the load-out and float-off. Another major concern during the operation was to avoid damages at the bottom and sides of FSO, due to motion & movement after free-floating; therefore, adequate clearances between DBU and FSO were to be provided, and guide posts were installed to prevent side damage of the DBU casings. This paper also presents various measures that indecate the connector bending moment, damage stability analysis, and mooring of DBU during float off.
등변 산형강 가새의 이력거동의 (履歷擧動) 정식화에 관한 연구
양영태(Young Tae Yang),윤명호(Myung Ho Yoon),문태섭(Tae Sup Moon) 한국강구조학회 1990 韓國鋼構造學會誌 Vol.2 No.4
In the analysis of braced frame, the hysteretic behavior of bracing member is very important. Up to now, through the experimental or theoretical study on a frame in within or without country, the hysteretic behavior of frame itself is well clarified. However, the behavior of brace member as a main element resisting lateral force has not been clear. In this paper, on the basis of data from test results, a mathematical formulation to predict the hysteretic loop of a brace is to be dervied and the process fully discussed. The selected sectional shapes of braces are steel double angles. The changes of strength and axial stiffness under repeated lateral loading are expressed as a function of energy dissipation ratio. The term $quot;energy dissipation ratio$quot; will be defined in a special pattern in this paper. The test, test results and basic algorithm to predict the hysteretic loop of a brace member are to be presented.