• Title/Summary/Keyword: 2D CAD Drawing

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A Research on Drawing Representation for BIM(Building Information Modeling) (BIM을 위한 도면 표현 사례에 관한 연구)

  • Chae, Kab-Su;Kim, Eon-Yong;Jun, Han-Jong;Lee, Myung-Sik;Kim, Khil-Chae;Choi, Jong-Chun;You, Seok-Joon
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2008.04a
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    • pp.470-475
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    • 2008
  • Building Information Modeling(BIM) is rooted in the economic and functional advantages of maturing from paper-based 2D drawings. The paper-based design and construction drawings are typical production from BIM and using the drawing under BIM environment is needed because there is not an alternative media instead of paper-based drawings. However using the 2D drawing process based on 2D CAD for BIM environment directly has difficulties because there are significant differences in data structure between CAD and BIM. CAD is based on traditional drawings as a whole while BIM is focused on individual objects and providing various levels of information associated with the objects. It can be an obstacle to move from 2D CAD to BIM that we don't have a standard or guideline for BIM. Futhermore, the complexity of drawing in representation would be the obstacle too, so the solution is discussed in the research based on the case of Samoo Architects and Engineers.

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A Study on the Possibility of 2D Design Drawing Implementation by Revit Architecture (Revit Architecture를 이용한 2D 설계도면 구현 가능성에 관한 연구)

  • Cho, Yong-Sang;Lee, Heewon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.10
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    • pp.5243-5250
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    • 2013
  • BIM(Building Information Modeling) enables 3D model-base management for all information produced by construction project during its life cycle. Also as a national policy, BIM has been institutionalized as design criteria. But, on the matter of 2D drawing using BIM software (Revit Architecture), it has been recognized as difficult to realize the same quality drawing drawn by CAD. The purpose of this study is verifying the possibility of printable design drawing implemented by BIM software at the same quality of 2D shop drawing drawn by 2D CAD. Through the analysis of basic design elements of 3D BIM software and 2D CAD software, with the case of partial cross sectional drawing which is most faithful representation of the basic design elements, this study find out that the 3D BIM software can produce the same quality 2D printable drawing utilizing its implicit function.

A Study on a Neutralization Method of Drawing for Augmenting Data in Heterogeneous CAD Drawings (증강 정보의 이기종 CAD 도면 활용을 위한 중립화 방법에 관한 연구)

  • Hwang, InHyuck;Ruy, WonSun;Park, InHa
    • Journal of the Society of Naval Architects of Korea
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    • v.54 no.4
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    • pp.344-351
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    • 2017
  • CAD systems used in various manufacturing industries have been rapidly switched from 2D to 3D. 3D-based design is becoming common in the shipbuilding industries too. However, there is still a demand for 2D drawings for ship production. So, it is necessary to continually improve 2D drawings. One way to improve 2D drawings is to add production information to the drawings. To do this, it is necessary to define the relation between the geometry information and the production information. Various types of drawings, which is inevitable because each drawing has its own purpose, make it difficult to define relations. This process can be simplified if the drawing information is neutralized. XML is a standard format for defining neutral data, and is already being used in various fields. In this study, a neutral augmented drawing has been defined by neutralizing the drawing information based on XML, and implemented for the allocation of their information with high quality of readability as well.

Automatic Generation of Explanatory 2D Vector Drawing from 3D CAD Data for Technical Documents (기술문서 작성을 위한 3 차원 CAD 데이터의 도해저작 알고리즘)

  • Shim H.S.;Yang S.W.;Choi Y.;Cho S.W.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.177-180
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    • 2005
  • Three dimensional shaded images are standard visualization method for CAD models on the computer screen. Therefore, much of the effort in the visualization of CAD models has been focused on how conveniently and realistically CAD models can be displayed on the screen. However, shaded 3D CAD data images captured from the screen may not be suitable for some application areas. Technical document, either in the paper or electronic form, can more clearly describe the shape and annotate parts of the model by using projected 2D line drawing format viewed from a user defined view direction. This paper describes an efficient method for generating such a 2D line drawing data in the vector format. The algorithm is composed of silhouette line detection, hidden line removal and cleaning processes.

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4D CAD Drawings based on Marker-based Augmented Reality (마커 기반 증강현실 4D CAD 도면)

  • Kim, Hongjo;Kim, Changyoon;Jeong, Hoyoung;Ha, Sooji;Kim, Kinam;Kim, Hyoungkwan
    • Korean Journal of Construction Engineering and Management
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    • v.16 no.4
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    • pp.30-40
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    • 2015
  • Two-dimensional drawings are widely used as a communication tool in the construction industry, but they are still hard to be understood by engineers with less experience. A four dimensional CAD drawing is presented based on marker-based augmented reality, for visual assistance, detailed information, and prevention of misunderstanding among users. The developed drawing enables the users to easily understand its contents through the functions augmenting components, providing detailed construction information, and simulating construction process, using the marker in a 2D drawing. A questionnaire-based survey validates the capability of the developed drawing that it improves inexperienced engineers' understanding of the drawings.

A Study on 4D CAD and GIS Integrated System for Process Risk Management Model (4D CAD와 GIS의 통합시스템을 통한 프로젝트 단계별 리스크관리 모델에 관한 연구)

  • Jeon, Seung-Ho;Yun, Seok-Heon;Paek, Joon-Hong
    • Journal of the Korea Institute of Building Construction
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    • v.7 no.3
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    • pp.91-98
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    • 2007
  • Recently a construction industry introduces information that brings about many advantages in the early planning phase, design phase and construction phase. Especially it replaces 2D, 3D systems(usually using explanation of drawing information) ai 4D CAD(offering a sort of 4D-having relation of construction schedule and 3D drawing information). Nevertheless a 4D has these benefits, it has limits which are not only usually using 3D modeling but also limit of making full use of practical affairs because of a lack of connecting varietals of progress of work. To solve these uppermost limits, this research is presenting unified systems to use in risk management which are efficient management of space and non-space information, space analysis, making full use of data base, introducing GIS system of easy interaction.

A study of the STEP-based Data Repository and P&ID-3D CAD Model Connected Pilot System at Nuclear Power Plant (원전 대상의 STEP 기반 데이터 저장소 및 P&ID와 3차원 CAD 모델 연계에 관한 연구)

  • 안호준;조광종;박찬국;한순홍;안경익;최영준
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • 2004.05a
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    • pp.395-400
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    • 2004
  • This study is that STEP based Data Repository of APR1400 Nuclear Power Plant Reactor Coolant System is developed. The STEP based Data Repository is accessed by Web-based and an attribute data of Reactor Coolant System Equipment is offered. Also, a P&ID drawing file & 3D CAD Model of Reactor Coolant System is loaded. The P&ID drawing file of Reactor Coolant System Equipment Model is connected with 3D CAD Model file. This 2D/3D CAD Model connected Prototype system confirms a real layout of Reactor Coolant System.

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On the Development of an initial Hull Structural CAD System based on the Semantic Product Data Model (의미론적 제품 데이터 모델 기반 초기 선체 구조 CAD 시스템 개발)

  • 이원준;이규열;노명일;권오환
    • Korean Journal of Computational Design and Engineering
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    • v.7 no.3
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    • pp.157-169
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    • 2002
  • In the initial stages of ship design, designers represent geometry, arrangement, and dimension of hull structures with 2D geometric primitives such as points, lines, arcs, and drawing symbols. However, these design information(‘2D geometric primitives’) defined in the drawing sheet require more intelligent translation processes by the designers in the next design stages. Thus, the loss of design semantics could be occurred and following design processes could be delayed. In the initial design stages, it is not easy to adopt commercial 3D CAD systems, which have been developed f3r being used in detail and production design stages, because the 3D CAD systems require detailed input for geometry definition. In this study, a semantic product model data structure was proposed, and an initial structural CAD system was developed based on the proposed data structure. Contents(‘product model data and design knowledges’) of the proposed data structure are filled with minimal input of the designers, and then 3D solid model and production material information can be automatically generated as occasion demands. Finally, the applicability of the proposed semantic product model data structure and the developed initial structural CAD system was verified through application to deadweight 300,000ton VLCC(Very Large Crude oil Carrier) product modeling procedure.

3D Digital modeling Method for Concept Developing Process in Architectural Design & Drawing (설계 및 도면작성단계에서의 디지털모델링방법연구 I)

  • Koh, In-Lyong;Dong, Jae-Uk
    • Journal of The Korean Digital Architecture Interior Association
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    • v.1 no.1
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    • pp.39-45
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    • 2001
  • The purpose of this study is to suggest the possibility which can use as instrument of design by CAD system. And it proposes how makes 3D object model through 2D Drawings in Design process. This study has review the 'Study Drawing' in design process, and application method of CAD as the Architectural Design Integration System. The Architecture can work in ani of the traditional 2D representations as well as in 3D and immediate visual feedback of his work in isometric and perspective projrctions.

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Development of an Extension Model based on Three Dimensional Wireframe Model for KOSDIC Format in the Construction Field (건설 분야 도면정보 교환 표준을 위한 3차원 와이어프레임 기반의 확장 모델 개발에 관한 연구)

  • Kim I.H.;Seo J.C.;Won J.S.
    • Korean Journal of Computational Design and Engineering
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    • v.10 no.3
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    • pp.179-187
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    • 2005
  • The usage of mixed 2D and 3D CAD data of commercial CAD systems is required in the construction practice. Sometimes 3D wireframe model is required by end-users when 2D CAD data is delivered. However, current KOSDIC can not represent 3D CAD data, because it has been developed as a 2D drawing delivery standard. Therefore, this study is to provide exchange and sharing of mixed 2D and 3D CAD data that add 3D wireframe model in the KOSDIC. To achieve this purpose, the authors have investigated the 3D CAD entities of commercial CAD systems, and have analyzed STEP standards providing 3D wireframe model. The result, the authors have extracted 3D CAD common entities based wireframe model which shall be added in the KOSDIC. This study can be beneficial by using the developed data model for heterogeneous CAD systems, and by providing the representation of mixed 2D and 3D CAD data in construction practice such as GIS, piping system, and so forth.