http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
마찰열 배분과 열전도를 이용한 브레이크 부품 온도 변화 예측
전갑진(Kab-Jin Jun),정성필(Sung-Pil Jung),윤지원(Ji-Won Yoon),전용호(Yong-Ho Jeon),박태원(Tae-Won Park),윤재호(Jae-Ho Yoon) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The braking performance is significantly affected by high temperature of the brake components. In particular, the repetitive or continuous braking causes excessive temperature rise of the brake components. This may result in fade, thermal judder, thermal crack, vapor lock and etc. The reason for the temperature rise is that the friction heat between a disc and pad is transferred to the brake components. In this research, a numerical method to analyze the heat transfer of the brake system using friction heat division and 1-D conduction is presented. An alpine test is observing the brake component temperature rise through the repetitive and continuous braking during a high mountain decent. And using this method, prediction of an alpine test result was achieved.
다물체 동역학 모델을 이용한 종이컵 성형기용 배럴캠의 마모 인자에 관한 연구
전갑진(Kab-Jin Jun),박태원(Tae-Won Park),정광열(Kwang-Yeil Cheong),김영국(Young-Guk Kim) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.3
3 차원 캠의 하나인 배럴캠은 자동화 생산 기계에서 인덱스 드라이브 유닛의 부품으로 많이 사용된다. 캠의 회전축과 종동절의 회전축이 90 도의 위상으로 직교한다. 인덱스 드라이브는 일정한 속도로 회전하는 캠의 입력에 대해 회전하고 정지한다. 터렛이 배럴캠의 회전에 의해 작동하는 동안 종이컵이 매우 빠르고 정확하게 성형된다. 그러나, 배럴캠과 종동절사이의 지속적인 미끄럼 접촉에 의해 점착마모가 발생하며 이러한 마모는 시스템의 성능에 영향을 준다. 결과적으로 제품의 불량율을 증가시킨다. 본 연구에서는 종이컵 성형기에 사용되는 배럴캠의 마모에 영향을 주는 인자가 접촉력임을 확인한다. 배럴캠과 롤러 사이의 접촉력은 다물체 동역학 모델을 이용해 계산한다. 그리고 해석 결과와 실제 시스템의 마모부와 비교를 통해 중요 마모 인자가 접촉력임을 검증한다. The barrel cam, which is a type of cylindrical cam, has been widely used as a part of index drive units for automatic manufacturing machines. The axis of rotation of the barrel cam is orthogonal to the axis of rotation of the follower. The index drive rotates or dwellsdepending on the cam profile, while the cam rotates with a constant velocity. Continuous sliding contact between the barrel cam and the follower surfaces causes wearing of the adhesive between them. This study shows that the contact force between two sliding bodies is responsible for the wear of the barrel cam in the paper-cup-forming machine. This contact force is calculated by using the multibody dynamics model of the paper-cup-forming machine. The analytical result is validated by comparing it to the actual wear spots on the real product.
COM 기반 프로그램 맞춤을 이용한 설계자 전용 해석 애플릿 개발
전갑진(Kab-Jin Jun),박태원(Tae-Won Park),박찬승(Chan-Seung Park),전용호(Yong-Ho Jeon),최성훈(Seong-Hoon Choi),김정범(Jung-Bum Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Many designers have difficulty to use the existing commercial program because of their complicated and numerous functions. This problem causes that the engineer spend more time to learn the commercial program than the actual design. Therefore, it’s very necessary a program which focused on the designer’s convenience. This paper presents that the development of an applet for designers customizing the existing COM(Component Object Model) based program. The COM component is so excellent in reusability and expandability. Therefore, the development can be easily applied to various requirements. The applet represented in this study can be effective to the designers by simplifying the user interface and analysis procedure.
전갑진(Kab-Jin Jun),박태원(Tae-Won Park),이수호(Su-Ho Lee),윤지원(Ji-Won Yoon),권순기(Soon-Ki Kwon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The air suspension system is widely used in commercial vehicles such as buses or special purpose trucks because it improves ride better than any other types of suspension. Since the durability of vehicle parts is directly related to the safety, the evaluation of the durability at the design state is necessary. In this research, the fatigue life of the air suspension frame for trucks is predicted by the modal stress recovery(MSR) method. Using the process proposed in this research, the fatigue life of vehicle parts can be predicted efficiently at the design stage.
우준성(Jun Seong Woo),전갑진(Kab-Jin Jun),박태원(Tae Won Park),박중경(Joong Kyung Park),황재철(JaeChul Hwang),조동협(donghyeob.cho),류제형(JeHyoung Ryu),김혁(Hyuk Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
When compared with a gear and chain, a timing belt is an efficient element to transfer object in the system. The timing belt can move objects and the system can be operated quietly. Moreover, users can control the translation of the object precisely by the step motors and electronic control devices. But the failure of the timing belt can cause economical loss and even injure of operator. Although the design standard has been offered by the suppliers of the timing belt, users can’t predict the life of the timing belt in operating environment. We made the computer program with the life prediction method of the timing belt, and it can help the users to choose the suitable timing belt in the system.
〈논문〉 자동차용 와이퍼 시스템의 유연 다물체 동역학 해석
정성필(Sung Pil Jung),박태원(Tae Won Park),전갑진(Kab Jin Jun),김욱현(Wook Hyeon Kim),정원선(Won Sun Chung) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
This paper presents the dynamic analysis method to estimate the performance of the flat type blade of the wiper system. The blade has a nonlinear characteristic since the rubber is a hyper-elastic material. Thus, the modal coordinate and absolute nodal coordinate formulations are used to describe the dynamic characteristic of the blade. Structural analysis for the blade is performed to find the bending characteristic of the blade. According to the analysis result, the blade section is divided into 3 parts: rigid, small and large deformation bodies. For the small deformation body, the modal coordinate formulation is used while the absolute nodal coordinate formulation is used for the large deformation body. To verify the dynamic analysis result, the experiment was performed. The simulation result is compared with the experiment result, and the flexible multi-body dynamic model is verified.
동력분산형 고속철도 주행성능 동역학 해석을 위한 기반기술 개발
윤지원(Yoon Ji-Won),박태원(Park Tae-Won),전갑진(Jun Kab-Jin),박성문(Park Sung-Moon),정광열(Kim Jung-Bum) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The development of a new railway vehicle is under progress through the Next Generation High-Speed Rail Development Project in Korea. Its aim is to develope fundamental technology of the vehicle that can run over 400㎞/h. The new distributed traction bogie system,‘HEMU’(High-speed Electric Multiple Unit), will be used and is different from that of previously developed high speed railway vehicles. Previous vehicles adopted push-pull type system, which means one traction-car drives rest all of the vehicle. Due to the difference, investigation on dynamic behavior and its safety evaluation are necessary, as a part of verification of the design specification. In the paper, current progresses of researches are presented. And the High-Speed Railway vehicle system is evaluated for a dynamic characteristic simulation. Proper dynamic models including air-suspension system, wheel-rail, bogie and car-body is developed according to the vehicle simulation scenario. The basic platform for the development of dynamic solver is prepared using nodal, modal coordinate system and wheel-rail contact module. Operating scenario is prepared using commercial dynamic analysis program and used for development of dynamic model, which contains many parts such as carbodies, bogies and suspension systems. Furthermore, international safety standard is applied for final verification of the system. Finally, the reliability of the dynamic model will be verified with test results in the further researches. This research will propose a better solution when test results shows a problem in the parts and elements. Finally, the vehicle that has excellent performance will be developed, promoting academic achievement and technical development.
정광열(Cheong Kwang-Yeil),박태원(Park Tae-Won),전갑진(Jun Kab-Jin),한승용(Han Seung-Young),최지훈(Choi Ji-Hun) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
At present, the trend of high speed train changes from push-pull type to Electric Multiple Unit(EMU) Type. To keep the pace with the change, EMU-Type train has been developed in Korea. The Next Generation High-Speed Rail of EMU-Type is aim to run over 420 ㎞/h. It has lots of power sources in the system, so EMU-Type has advantages in high pulling capacity and accelerating force. But, to apply EMU-Type which is difference from existing Push-pull type, running stability of system needs to be considered. In this paper, Z-link and anti-roll bar composing the railway vehicle are evaluated before developing the full-scale dynamic model for HEMU(High-speed Electric Multiple Unit). The analysis inspects kinematic behavior between car body and bogie. Therefore, the dynamic characteristic of Z-link and anti-roll bar are analyzed, then dynamic model is developed. In the future work, the dynamic model is validated by stability and dynamic analysis applying irregularity.