• Title, Summary, Keyword: 3D CAD

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3D/4D CAD Applicability for Life Cycle Facility Management (3D/4D CAD를 통한 시설물 생애주기 관리 유용분야 도출)

  • Park, Jung-Jun;Kim, Chang-Yoon;Kim, Hyoung-Kwan
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.291-296
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    • 2008
  • For the past two decades, 3D/4D CAD research has heel mainly focused on the design and construction phase of a facility life-cycle. However, there has been a general notion that the strength of 3D/4D CAD lends itself to other phases such as planning, operation and maintenance. In this research, a 3D/4D CAD model was generated in a commercial software platform. Then, the traditional 1:fe cycle facility management procedures are reviewed to, see any possible improvement opportunity with the 3D/4D CAD model as an example. A focus group interview, in conjuction with an extensive literature review, produced the list of area where 3D/4D CAD model could significantly benefit the traditional life cycle facility practices. Finally, a questionnaire-based survey was conducted with 155 respondents to statistically verify the feasibility of 3D/4D CAD for life cycle facility management.

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An Efficient Algorithm for Rebar Element Generation Using 3D CAD Data (3D CAD 데이터 기반의 효율적 철근 요소 생성 알고리즘)

  • Cho, Kyung-Jin;Lee, Jee-Ho
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.22 no.5
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    • pp.475-485
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    • 2009
  • In this paper a two-step algorithm is proposed to efficiently generate rebar elements from 3D CAD data in the context of CAD/CAE data transfer. The first step is an algorithm to identify various type rebar objects and their attributes by analyzing 3D CAD data in STEP format, which is one of the international data standards. The second algorithmic step is a procedure to generate one-dimensional rebar elements from the object data made through the first step for finite element analysis or other CAE tasks. Successful rebar element data generation from real 3D CAD data for a reinforced concrete structure shows the efficacy of the proposed algorithm.

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.

Design of Platform Independent 3D Shoe CAD System (플랫폼에 독립적인 3D 신발 캐드 시스템의 설계)

  • Lee, Yun-Jung;Lee, Young-Sook;Kim, Young-Bong
    • Journal of Korea Multimedia Society
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    • v.9 no.8
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    • pp.1010-1019
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    • 2006
  • CAD system is a very important technology in designing the products which we are using today. This CAD technology has been enlarging its area into 3D CAD systems with the development of computer graphics technologies. In particular, such advances have been realized in special area such as the CAD system for designing shoes. However, because it is difficult to design a 3D CAD system, most CAD developments except for major CAD software companies usually have employed the AutoCAD which realizes 3D concepts. Also, many shoes' designers have been skilled with 2D shoe CAD systems and then they can make high achievements. Therefore, we design a new shoe CAD system with advantages of 2D CAD system and 3D CAD system. We also implement the scheme to transfer the data between 2D CAD system and 3D CAD system and also grading technologies to get patterns of various shoes size from a basic shoe's design.

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A Study on the Analysis and Comparison of DC Suite and CLO3D

  • Jang, Heekyung;Chen, Jianhui
    • Journal of Fashion Business
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    • v.21 no.6
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    • pp.87-105
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    • 2017
  • In the fashion industry, 2D apparel CAD technology has already matured and various 3D apparel CADs have been introduced and are available for users. In the fourth industrial revolution era, the 3D apparel technology will be highlighted, and the research of 3D apparel CAD will be much more emphasized upon. Currently, various 3D apparel CAD have been developed and commercialized due to the rapid development of technology. However, in reality, the analysis and discussions about its problems and the improvements for clothing from a user's perspective have not been carried out yet. The purpose of this study was to provide the reference information about 3D apparel CAD for users by studying and comparing the characteristics of 3D apparel CAD. The 3D apparel CAD, DC Suite and CLO3D were selected for technical comparative study. The 3D apparel CAD mainly includes 3D body system, garment pattern system and garment simulation system and so on. It was compared and analyzed; the problem was presented, and the directions of improvement were put forth.

Recipe-based estimation system for 5D(3D + Cost + Schedule) CAD system (레서피(Recipe) 기반의 견적 방법을 이용한 5D CAD 시스템)

  • Choi, Cheol-Ho;Park, Young-Jin;Han, Sung-Hun;Chin, Sang-Yoon
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.154-160
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    • 2006
  • There wasn't very successful practice cases for the quantity take-off based on the CAD system since the CAD system is used in the construction industry more than 20 years in Korea. It was also not easy to use 3D CAD system in design management and cost management in the construction industry although 3D CAD system is very successful in the manufacturing industry for those areas recently. It is important to construct 3D libraries and to supply those libraries for the designers in time. Architectural work is a kind of creative work. So, Architects like to create their own model. Unlike the manufacturing industry, 3D CAD system can not be survived in the construction industry without new 3D objects supply in the right time. Moreover, the estimation system for 3D must support the schematic design phase, detailed design phase and construction design phase. The product called "Constructor" of Graphisoft consist of modeller, estimator and scheduler based on 3D model. We applied the system to a real project and compared the estimation result and we made a very successful case study.

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Development of a Similarity Evaluation System for Offshore Plants' 3D Piping CAD Models Created Using Aveva Marine and SmartMarine 3D (Aveva Marine과 SmartMarine 3D 간의 해양 플랜트 3D 배관 CAD 모델 유사도 평가 시스템 개발)

  • Lee, Jaesun;Kim, Byung Chul;Kim, Hyungki;Cheon, Sanguk;Cho, Mincheol;Lee, Gwang;Kim, Jin-Hyun;Mun, Duhwan;Han, Soonhung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.40 no.4
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    • pp.397-406
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    • 2016
  • Diverse stakeholders engaged in design, construction, and operation and maintenance of offshore plants typically operate heterogeneous plant 3D CAD systems. Engineering, procurement, and construction (EPC) companies are required to submit plant design result to the owner in the form of a plant 3D CAD model, as specified in the contract. However, because of the limitations of data interface of plant 3D CAD systems, EPC companies frequently perform manual remodeling to fulfill the terms and conditions of the contract. Therefore, comparison should be performed between the source plant 3D CAD model and the remodeled plant 3D CAD model to prove the validity of the remodeled plant 3D CAD model. To automate the comparison process, we have developed a system for quantitatively assessing the similarity of the plant 3D CAD models. This paper presents the architecture and detailed functions of the system. In addition, experimental results using this system are explained.

Data Translation from 2D MEMS Design Data by the Removal of Superposed Entity to the 3D CAD Model (MEMS 설계용 2차원 데이터의 중복요소 제거를 통한 3차원 CAD 모델로의 변환)

  • Kim, Yong-Sik;Kim, Jun-Hwan
    • Korean Journal of Computational Design and Engineering
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    • v.11 no.6
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    • pp.447-454
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    • 2006
  • Although there are many needs to use 3D models in MEMS field, it is not easy to generate 3D models based on MEMS CAD. This is because MEMS CAD is based on 2D and their popular format-GDSII file format- has its own limits and problems. The differences between GDSII file format and 3D CAD system, such as (1) superposed modeling, (2) duplicated entity, (3) restricted of entity type, give rise to several problems in data exchange. These limits and problems in GDSII file format have prevented 3D CAD system from generating 3D models from the MEMS CAD. To remove these limits and solve problems, it is important to extract the silhouette of data in the MEMS CAD. The proposed method has two main processes to extract silhouette; one is to extract the pseudo-silhouette from the original 2D MEMS data and the other is to remove useless objects to complete the silhouette. The paper reports on the experience gained in data exchange between 2D MEMS data and 3D models by the proposed method and a case study is presented, which employs the proposed method using MEMS CAD IntelliMask and Solidworks.

A Study on the Development of the 3-Dimensional Digital Design Tool (3$D^3$T) (3D 디지털 디자인 도구 개발에 관한 연구)

  • 김원섭
    • Archives of design research
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    • v.17 no.1
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    • pp.241-252
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    • 2004
  • In this time, CAD is most important tool in Product Design Process. Traditional design methods were hardly used in Concurrent Engineering Process. But, CAD tools based on Reverse Engineering method have a lot of serious problem in using designer's works. Especially, in the early stage in design process, adopting CAD tool is impossible, cause of a property of design - intuition. A late studies about CAD system have approaching its quantitative factors in not only software but also hardware. In this paper, I researched about the problems of traditional 3d CAD tools and the new interface approach methods in recent CAD studies. Then, I proposed the guidelines and two alternatives about to developing 3D3T in ubiquitous engineering environment.

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Knit Design Using 3D Virtual Clothing Simulation Program of Knit CAD System (니트 CAD시스템의 3D 가상착의 프로그램을 활용한 니트디자인)

  • Lee, Seul-A;Lee, Yoon Mee;Lee, Younhee
    • Journal of the Korean Society of Costume
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    • v.65 no.1
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    • pp.104-117
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    • 2015
  • Recently, the fashion industry has been integrating with The IT industry in order to develop in various ways. This study looks into ways to utilize the 3D CAD system, which would reduce time and cost while producing samples, and strengthen the communication between the brand and its cooperators by deploying knit designs using Knit CAD system's 3D virtual clothing program. The research method was reference, Internet resources 3D fashion CAD system and 3D Knit CAD system. Based on the data, simulation of the complete design of 4 deployed knit designs was done by using 3D virtual clothing program of the Knit CAD system utilizing knit design elements. One of each design element among the virtual clothing designs was chosen to produce real clothing, and the experts did verification on the appearance assessment of 3D virtual clothing knit designs of the Knit CAD system. As a result, 3D virtual clothing knit design of the Knit CAD system proved itself as an efficient system in terms of time and cost.