• 항공우주시스템공학회지
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• 제2권2호
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• pp.46-50
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• 2008

Aerodynamic characteristics, such as drag and lift, play an important role in automobile design under certain speed conditions. Such characteristics are essential to design an automobile since they are directly related to automobile's performance such as passenger safety and fuel consumption. There is a huge demand for the automobile to have safe performance at high speed. Reduction in drag is also important and it could lead to the solution of air flow induced noise and dust problems. The objective of this research is to find out the aerodynamic differences between conventional side mirror and a modified one using CFD. Although drag generated around a side mirror is only about 7% of the total drag when a car runs, it is very closely related to driver's field of vision and noise generation. CFD simulation of the flowfield around a car side-view mirror was performed using a commercial code; Gambit and FLUENT.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1652-1657
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• 2007

Designer must cope with frequent changes in geometric information of automobile suspension module in the early stage of the design process. The authors developed the PSG(Parametric Set Generator) to create parametric models and to change geometric information concerning the lower arm, which is one of the important parts of the automobile suspension module. CAD models provided from the PSG can be utilized to assess fatigue durability via the FE modeling support system. This system provides easy and fast FE-modeling for a static and durability analysis of the lower arm. The PSG and the FE modeling support system are integrated using the e-engineering framework based on the JADE platform. In this study, a durability analysis as a case study for the lower arm manufactured at H company is performed, and the efficiency obtained is discussed.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.525-530
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• 2003

Recently an automobile industry is concerned about an automobile wiring harness system. It means that development of component modules is on the increase. An importance of the connector in one part of the modules will be enhanced. A connector is made of P.B.T. (Poly Butylene Terephthalate). PBT is resistant to the high temperature. This paper deals with thermal strain of connector. According as temperature increase, effects of the temperature and thermal strains give an analysis of the deformation using ABAQUS. This apparent thermal strain results actually from the variation of temperature. Being based on this analysis, axiomatic design applies to design parameters of the connector. As compared with CAE analysis, a performance improvement makes certain of the truth of the matter.

• 한국자동차공학회논문집
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• 제13권1호
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• pp.184-193
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• 2005

Digital representations of products and parts have largely replaced physical drawings as the form in which product data are stored, analyzed, and communicated among the people contributing to the design of an automobile. Many individuals and companies participate in the design of an increasingly complex automobile; hence, the design process depends critically on team members' ability to share information about essential design elements. These trends have elevated the importance of the quality of product data and its efficient exchange. In this paper, we show state-of-the-art on Product Data Quality(PDQ), and activities of PDQ assurance. And we propose a novel design history-based approach for diagnosis and healing of a CAD model.

• 대한인간공학회지
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• 제29권6호
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• pp.831-841
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• 2010

Usability evaluation of physical products involves characterizing complex physical interactions between humans and products. Human models known as manikins have been widely utilized as usability evaluation tools for automobile interior package design. When combined with computer-aided design software programs, such manikins can be used to simulate driving postures and evaluate driver-interior fits early in the design process, and therefore, may greatly facilitate achieving high-quality design in a cost-efficient manner. The purpose of this study was to define a set of manikins for designing automobile interior packages for the South Korean male population. These manikins were conceptualized as "boundary" manikins, which represent individuals lacking in certain physical capacities or having usability-related issues (e.g., an individual with the 5th percentile forward reach capability, an individual with the 95th percentile shoulder width). Such boundary manikins can serve as an efficient tool for determining if an automobile interior design accommodates the majority of the population. The boundary manikins were selected from the large sample of Korean males whose anthropometric dimensions were described in the recent Size Korea anthropometric database. For each male in the database, his comfortable driving posture was represented using a kinematic body linkage model and various physical capacity measured and usability-related characteristics relevant to driver accommodation were evaluated. For each such measure, a boundary manikin was selected among the Korean males. The manikins defined in this study are expected to serve as tools for ergonomic design of automobile interior packages. The manikin selection method developed in this study was implemented as a generic software program useful for various product design applications.

• Composites Research
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• 제28권5호
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• pp.291-296
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• 2015

본 연구에서는 자동차 구조물의 경량화를 위해 자연섬유 복합재료를 적용하여 차량용 패널의 구조 설계 및 해석을 수행하였다. 구조 설계를 위해 Flax/vinyl ester 복합재료를 적용하였다. 섬유 복합재 패널의 제조공법은 VARTML(Vacuum Assisted Resin Transfer Molding-Light) 제조공법이 적용되었다. 구조 설계 후 충돌에 의한 구조물의 안전성을 분석하기 위해 충돌 실험을 수행하였다. 충돌 실험은 유럽 보행자 보호 기준에 맞게 수행하였으며 해석 결과를 검증하기 위하여 시편을 제작해 충격 실험을 수행하였다. 또한 충격 손상 후 구조물의 잔류강도를 측정하기 위해 손상을 가한 시편의 압축강도 실험을 수행하였다.

• Composites Research
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• 제28권2호
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• pp.46-51
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• 2015

본 연구에서는 차량용 본넷의 구조 설계 및 해석을 수행하였다. 구조 설계를 위해 아마/비닐 에스테르 복합재료가 적용되었다. 아마 섬유 복합재 본넷의 제조공법은 VARTML(Vacuum Assisted Resin Transfer Molding-Light) 제조공법이 적용하였다. VARTML 공법은 한쪽 면은 견고한 금형을 사용하고 다른 면은 진공과 함께 유연한 금형을 사용하여 압력차를 이용하여 내부에 적층된 섬유에 수지를 신속하게 함침 시켜 성형하는 방법이다. 아마/비닐 에스테르 패널로 부터 시편을 가공하여 재료의 기계적 물성치를 획득하기 위한 시편 시험을 수행하였다. 이를 기반으로 자동차 본넷의 구조 설계를 수행하였다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2002년도 춘계학술대회 논문집
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• pp.3-7
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• 2002

The die casting process was used to manufacture a alternator housing for automobile. Specially automobile parts were required light and hight strength. Therefore simulation have been carried out die casting process of the alternator housing. In this paper, we investigated about characteristics of the die casted alternator housing the HPDC(High Pressure Die Casting) process. Also we designed the die casting die with the simulation results of the alternator housing. The MAGMAsoft and Auto-CAD was used as computer simulation and design code and used material was ADC12(Aluminum Die Casting Alloy). We present the results of filling behavior and design of die process of the alternator housing cast. The result obtained about filling behavior and design of die of the cast showed good agreement with test result.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 2부
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• pp.95-102
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• 2006

고도의 기술발전과 함께 한 다양한 형태 및 기능을 지닌 자동차 출현과 더불어 운전자의 감성을 고려한 자동차들이 등장하고 있다. 최근 이러한 변화는 외관의 형태를 우선으로 하는 익스테리어 뿐만 아니라 사용자의 사용성을 고려해야 하는 인테리어 부분에도 적용되고 있다. 그러나 감성을 고려한 자동차 인터페이스 디자인에 대한 연구가 그 기술발전 속도를 따라가지 못하고 있다는 반성의 소리와 함께, 쉽게 과거의 연구결과를 접어둔 채 새로운 기술에만 의존하려는 경향을 보이고 있는 것 또한 사실이다. 이에 인간-기계 시스템에 있어서 운전자의 감성을 고려한 자동차 인테리어 설계에 관한 연구가 다양한 각도로 시행되어야 하는 점과 사용자의 감성을 고려하여 설계된 인터페이스 디자인 검증에 대한 필요성이 인식되고 있다. 따라서 본 연구에서는 감성디자인 중 최근 주목 받고 있는 레트로 스타일을 적용한 자동차 인테리어의 인터페이스 디자인을 통하여 새로운 자동차의 인테리어 디자인의 가이드라인을 제시하고자 한다.

• 한국정밀공학회지
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• 제12권6호
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• pp.137-144
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• 1995

The purpose of this study is to obtain a foundation data for chassis design and road noise reduction of automobiles. Using the combination of the automobile, radial tires and instrumentation equipment, experimental investigation was carried out to examine the characteris- tics of the structural vibration of tire as the key to obtaining the effective parameters for reducing road noise. From the results of this studies it has been confirmed that the specific ranges of natural frequency of tire exciting the suspension and chassis system. And the tire, axle and chassis natural frequency of automobile govern the road noise. Results show that material properties of tire and experimental condition are major parameter for shifting of tire natural frequency. These results would be utilized as basic materials for the design of chassis design with papametric study, which enables a designer of an automobile to foresee the influence of the various design factors or operating conditions.