• 한국융합학회논문지
• /
• 제5권4호
• /
• pp.75-79
• /
• 2014

본 연구에서는 자동차 냉각팬에 대해서 유동해석을 수행하였다. 냉각팬의 형상에 대하여 유동 조건은 같게 하여 Canival, Teracan 및 basic 3가지의 모델을 CATIA프로그램으로 설계하여 본 해석을 실시하였다. 날개의 모양에 따라 유체의 속도의 등고선이 변화하는 것을 볼 수 있으며, 날개의 모양 또는 넓이에 따라 각기 다른 압력분포를 볼 수 있었다. 세 가지 모델 중, Teracan 모델인 냉각팬이 공기의 유동이 많아 라디에이터의 열을 식히는데 가장 효율적이 된다고 사료된다. 그리고 디자인 면에서의 융합 기술로의 접목도 가능하여 미적인 감각을 나타낼 수 있다.

• 한국산학기술학회논문지
• /
• 제11권12호
• /
• pp.4677-4684
• /
• 2010

본 연구에서는 자동차 도어에 대한 충격을 흡수하기 위한 차체의 해석을 함으로서 승차자의 안전을 조사할 수 있었다. 차체의 충돌이나 운전자의 부주의로 인한 주차 사고 때문에 자동차 도어의 손상이 일어난다. 이러한 도어는 CATIA 프로그램으로 모델링하였고, ANSYS 프로그램을 통하여 충돌에 의한 도어 모델의 파손과정을 해석하고 조사하였다. 등가응력과 변형율의 등고선들을 구하였고 충돌 하에서 도어가 어떻게 파손이 일어나는지를 확인하였다. 본 연구 결과로서 충돌안전을 고려한 도어 설계에 기여 할 것이라 사료된다.

• 한국정밀공학회지
• /
• 제24권8호통권197호
• /
• pp.58-66
• /
• 2007

In order to improve the recyclability and to reduce the recycling cost and time, the disassembly technology should be systemized because the worn out products can be reused or recycled after disassembly processes. This paper attempts to propose the integrated CATIA-based DfD (Design for Disassembly) support system to promote the disassemblability of products. The system is composed of two modules; evaluation of disassemblability, generation of DfD alternatives. The disassemblability of current vehicle is evaluated to identify the weak point in terms of disassembly using the DELMIA and developed evaluation system. Furthermore a new expert system is developed to propose the optimal redesign rule and principle for generating the DfD alternatives. In order to generate the DfD alternatives, a CATIA-based design support system is implemented. The system can provide quick results and ensure consistency and completeness of the redesign alternatives.

• 한국정밀공학회지
• /
• 제20권12호
• /
• pp.115-125
• /
• 2003

The design methodology of plastic injection molding die has been gradually moved from two-dimensional line drawings to three-dimensional solid models. The 3D design gives many benefits, a few of which are: ease of design change, data associativity from concept design to final assembly. In the paper represented is the implementation of a program which automatically generates 3D mold-bases and cooling-lines, conforming to given geometric constraints. It utilized a commercial CAD software and the related API(application program interface) libraries. We constructed a DB(database) of typical mold-bases assembled from standard parts, from which the geometry (position & dimension) of a mold-base and composed parts can be automatical]y determined by a few key parameters. Also we classified cooling lines into several typical types and constructed a DB, from which the position of cooling lines is automatically determined. The research is expected not only to simplify construction of a 3D mold-base model including cooling lines but also to reduce design efforts, by way of databases and automatized determination of geometric dimensions.

• 한국산학기술학회논문지
• /
• 제15권8호
• /
• pp.4769-4775
• /
• 2014

본 논문은 다관절 붐의 선단이 구조물과 충돌할 때 발생하는 각 붐의 동응력에 대해서 논하고자 한다. CATIA를 이용하여 3D 모델을 작성하고, ADAMS와 ANSYS를 이용하여 메쉬작업을 수행 후 응력데이터를 포함한 다관절 붐의 MNF를 만든다. 이 두가지 모델을 가지고 ADAMS에서 FFT해석을 수행하여 각각 모델의 타당성을 알아본다. ADAMS에서 타당성이 검증된 모델을 이용하여 붐 선단의 충돌해석에 따른 동특성 해석을 수행한다. ADAMS Durability를 이용하여 다관절 붐과 구조물의 충돌시 각 붐에 응력이 크게 발생하는 지점을 알아보고자 한다.

• 한국CDE학회논문집
• /
• 제2권2호
• /
• pp.103-110
• /
• 1997

In the development of large complex assembly, most design changes are from the following reasons.: 1) insufficient consideration of assembling sequence of downstream process. 2) interference and fit-up of related parts. 3) initial design changes which are not completely resolved. In order to reduce the first reason of above, the assembly-centric modeling methodology was proposed in the part (1) of the thesis. In this part (2), a Digital Mock-Up system, which is a tool to build a virtual mock-up in design stage, has been developed in order to prevent the other two reasons. The system can build a virtual assembly in various ways as followings.: 1) assembling parts which are located in user defined envelope. 2) assembling parts with the specified disciplines. 3) assembling parts that are selected in the part list. It can also make an assembly by the combination of above methods. In addition to that, it has the functions to read/write the virtual assembly and to explode parts of the assembly in desired direction. With the virtual assembly, engineers can design interference free parts without making physical mock-up. The system has been implemented with Oracle database management system in CATIA environment.

• 항공우주시스템공학회지
• /
• 제11권1호
• /
• pp.22-27
• /
• 2017

본 연구에서 광섬유 브래그 격자 센서를 이용한 보행 진동 측정에 관한 연구를 수행하였다. 보행 진동 측정 시스템의 민감도를 향상시키기 위하여 FBG Seismic sensor 부를 재설계하였다. 성인남성의 평균 걷는 주기 1.5~2.5 Hz를 설계목표인 외부가진 값으로 가정하고, FBG Seismic sensor 부의 1차 모드 고유진동수 값을 외부 가진 주파수 부근 값인 3.5 Hz를 갖도록 CATIA와 ABAQUS를 이용하여 설계하고 제작함으로써 기존의 보행 진동 측정 시스템과 대비하여 민감도를 약 15배 향상 시킬 수 있었고, 침입 감지 분야 적용에 적합함을 확인하였다.

• International Journal of Safety
• /
• 제5권1호
• /
• pp.5-9
• /
• 2006

The present study reports on the results of a risk survey of machinery safety at a shoe factory in Qingdao, China. The aim is to decrease industrial accidents and increase worker job satisfaction by searching for a change from a trend analysis and making improvements in problem areas. The first risk survey for machinery safety was carried out in April 2005. Based on the analysis of the survey results, machinery safety devices was installed in the factory by using CATlA V5. Also, we investigated job satisfaction concerning working apparatus and work tool improvement in a questionnaire about the working environment. The second survey of machinery safety was carried out in September 2005. We are in the process of comparing the first survey results with the second survey results in order to analyze decreasing trend in industrial accidents and improvement in job satisfaction. So far the data have shown improved short-term turnover and absenteeism. It means CATIVA V5 and CFR has had positive effect regarding safety in shoe manufacture industry. The survey with CATIVA V5 and CFR will be expanded to other East-Asian countries including Vietnam. The hope is that the present approach could make a significant contribution toward improved safety.

• 한국기계가공학회지
• /
• 제9권1호
• /
• pp.49-54
• /
• 2010

An integrated machining center is developed for high precision and productivity manufacturing. The developed machine is composed of the high precision spindle using ball bearings, the high stiffness bed and the three axis CNC controller with the high resolution AC servo motor. In this paper, structural and modal analysis for the developed machine are carried out to check the design criteria of machine. The analysis is carried out by FEM simulation with using the commercial software, CATIA V5, ANSYS and ARMD. The simulation model of machine is made by shell and solid finite elements. This study also presents the measurement system on the modal analysis of an integrated machining center. The weak part of the machine is found by the analytical evaluation. The results provide with the structural modification data for good dynamic behaviors. And the safety of machine is confirmed by the modal analysis of modified machine design. As this study results can be trustworthy with the analysis of ANSYS and CATIA, integrated machining center can be successfully developed.

• 한국기계가공학회지
• /
• 제16권6호
• /
• pp.41-46
• /
• 2017

Productivity improvement and cost reduction in the aircraft industry have become major industrial objectives, and improving productivity by reducing machining time has become a key focus. When numerical cutting code is created by CAM software, such as CATIA or UG-NX, it is impossible to control machining feed speed using cutting force changes depending on the machining tool path. However, machining an aircraft engine part from difficult material, such as Inconel 718, takes a long time, and tool chipping or breakage often occurs from forcing the machining path too quickly. This study investigated and verified the reliability of the AdvantEdge production module (PM)using cutting power tests. In particular, diffuser and diffuser case parts were considered, comparing cutting power and machining time using AdvantEdge PM and CATIA.