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RISS 인기검색어
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- 저자 : 박관흠(Park Kwan Hum) (검색결과 6 건)
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김영웅(Kim Young Woong),박관흠(Park Kwan Hum),홍성오(Hong Sung Oh) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
EuroNCAP(European New Car Assessment Program) announced recently a modified testing protocol for side impact assessment using the EUROSID-2 dummy instead of the EUROSID-1 dummy. The EUROSID-2 dummy is identical in many parts with the EUROSID-1 dummy but shows different behavior in experiments. Hence, the development of a model for the ES-2 dummy is of great interest for the automotive engineers working in the field of safety. This paper shows a technique of improving occupant injury performance when using an EUROSID-2 dummy.
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김영웅(Kim Young Woong),박관흠(Park Kwan Hum),홍성오(Hong Sung Oh) 한국자동차공학회 2005 한국자동차공학회 Symposium Vol.- No.-
EuroNCAP(European New Car Assessment Program) announced recently a modified testing protocol for side impact assessment using the EUROSID-2 dummy instead of the EUROSID-l dummy. The EUROSID-2 dummy is identical in many parts with the EUROSID-1 dummy but shows different behavior in experiments. Hence, the development of a model for the ES-2 dummy is of great interest for the automotive engineers working in the field of safety. This paper shows a technique of improving occupant injury performance when using an EUROSID-2 dummy.
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스냅스루 좌굴을 이용한 미소스위치의 설계, 제작 및 실험
고정상,조영호,곽병만,박관흠,Go, Jeung-Sang,Cho, Young-Ho,Kwak, Byung-Man,Park, Kwan-Hum 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.2
A snapping-beam microswitch has been designed, fabricated and tested. From a design analysis, necessary and sufficient conditions for a snap-through switching fouction have been derived for a clamped shallow beam. The necessary condition has resulted in a geometric relation, in which the ratio of beam thickness to initial beam deflection plays a key role in the snapping ability. The sufficient condition for the snapping action has been obtained as a function of the inertia force due to applied acceleration, and the electrostatic force, adjustable by an inter-electrode voltage. For experimental investigations, a set of microbeams of silicon dioxide/$P^+$silicon bimorphs have been fabricated. Geometric size and mechanical behavior of each material film have been measured from on-chip test structures. Estimated and measured characteristics of the fabricated devices are compared.
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에어백용 압저항형 외팔보 미소 가속도계의 설계, 제작 및 시험
고종수,조영호,곽병만,박관흠,Ko, Jong-Soo,Cho, Young-Ho,Kwak, Byung-Man,Park, Kwan-Hum 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.2
A self-diagnostic, air-damped, piezoresitive, cantilever-beam microaccelerometer has been designed, fabricated and tested for applications to automotive electronic airbag systems. A skew-symmetric proof-mass has been designed for self-diagnostic capability and zero transverse sensitivity. Two kinds of multi-step anisotropic etching processes are developed for beam thickness control and fillet-rounding formation, UV-curing paste has been used for sillicon-to-glass bounding. The resonant frequency of 2.07kHz has been measured from the fabricated devices. The sensitivity of 195 $\mu{V}$/g is obtained with a nonlinearity of 4% over $\pm$50g ranges. Flat amplitude response and frequency-proportional phase response have been obserbed, It is shown that the design and fabricaiton methods developed in the present study yield a simple, practical and effective mean for improving the performance, reliability as well as the reproducibility of the accelerometers.
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잔류 응력 해석과 연계된 실린더 헤드 내구 해석 기법 개발
방인완(In-Wan Bang),장훈(Hoon Chang),박관흠(Kwan-Hum Park) 한국자동차공학회 2005 한국자동차공학회 Symposium Vol.- No.-
CAE techniques for durability analysis are essential support tools to the design process for automotive parts. The reliability and the improvement of engine durability analysis can be achieved when the results such as residual stress distribution are considered with the structural analysis. In this study, the residual stress distribution was simulated during heat treatment of a cylinder head for diesel engine. The thermal history of the cylinder head was measured to calculate heat transfer coefficient during quenching and validate the simulation results. The residual stresses were also measured after heat treatment and the calculated residual stress distribution was in good agreement with the measured values. Considering the calculated residual stresses distribution as initial stresses, the cylinder head/block compound structural analysis was carried out to evaluate the durability of the cylinder head during engine running condition. It was possible to evaluate the effects of residual stresses on the engine durability quantitatively by this procedure. This integration between process simulation and structural simulation is expected to make a contribution to the reduction of design period and the increase of engine durability being applied in the early design stage.
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잔류 응력 해석과 연계된 실린더 헤드 내구 해석 기법 개발
방인완(In-Wan Bang),장훈(Hoon Chang),박관흠(Kwan-Hum Park) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
CAE techniques for durability analysis are essential support tools to the design process for automotive parts. The reliability and the improvement of engine durability analysis can be achieved when the results such as residual stress distribution are considered with the structural analysis. In this study, the residual stress distribution was simulated during heat treatment of a cylinder head for diesel engine. The thermal history of the cylinder head was measured to calculate heat transfer coefficient during quenching and validate the simulation results. The residual stresses were also measured after heat treatment and the calculated residual stress distribution was in good agreement with the measured values. Considering the calculated residual stresses distribution as initial stresses, the cylinder head/block compound structural analysis was carried out to evaluate the durability of the cylinder head during engine running condition. It was possible to evaluate the effects of residual stresses on the engine durability quantitatively by this procedure. This integration between process simulation and structural simulation is expected to make a contribution to the reduction of design period and the increase of engine durability being applied in the early design stage.
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