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차대차 충돌 시 연료계통 손상 최소화를 위한 차체구조 보강 방안 연구
황인수(Insoo Hwang),임종현(Jonghyun Yim),김동석(Dongseok Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Fuel integrity protection is one of the inportant missions when we develop vehicle crash worthiness becayse of critical accident effect to passengers. Therefore, several test modes more severe than regulation are considered at rear body structure design. In this paper, car-to-car rear impact crash analysis with impact velocity of80 km/h was performed in order to compare the severity of structure deformation with it at FMVSS 301 test condition. Also modification concept of rear body structure was proposed to reduce de formation of fuel system safety zone.
New FMVSS301 법규 조건에 의한 승용차의 후방충돌 해석 사례
황인수(Insoo Hwang),임종현(Jonghyun Yim),김동석(Dongseok Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
NHTSA upgraded the rear impact test in the FMVSS(Federal Motor Vehicle Safety Standard) on fuel system integrity. This new rule replaces a full rear impact test procedure at 48 ㎞/h with an offset rear impact test procedure specifying that only a portion of the width of the rear of the test vehicle be impacted at 80 ㎞/h. In this paper, we performed the rear crash simulation according to the new rule and evaluated the results of simulation and test. The result showed higher deformation value than that of old FMVSS301. All simulation results existed within the in-house guideline, and test result was satisfied with body deformation requirements.
New USNCAP 전방 조수석 승객의 안전도 개선을 위한 해석적 연구
이해성(Haeseong Lee),임종현(Jonghyun Yim),김동석(Dongseok Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
For model year (MY) 2010, the United States Department of Transportation's (USDOT) National Highway Traffic Safety Administration (NHTSA) will make changes to its existing U.S. New Car Assessment Program (USNCAP). For the frontal crash test program, NHTSA will maintain the 56 kph full frontal barrier test protocol but will update the test dummies and associated injury criteria used to assess and assign a vehicle's frontal impact star rating. The Hybrid III 5th %ile female dummy will be used in the right front passenger position, the body regions and injury criteria will be changed to head (HIC15), neck (Nij, tension, and compression), chest (deflection), and femur (axial force). The risk of injury for Nij=0 is 3.8 %, so that this injury should be given more weight. To achieve lower risk of neck injury, the movement of pelvis, torso, and head have to be balanced. Furthermore improvement of the chest deflection is essential. For the 5th %ile female dummy in the passenger side is more sensitive than 50th %ile dummy. Through combination of other restraint systems such as airbag, load limiter and pretensioner of seat belt, neck injury has improved.
차량개발 초기단계에서의 보행자 Lower Leg 보호 방안 Case Study
이윤형(Yunhyung Lee),홍철기(Chulkee Hong),임종현(Jonghyun Yim),김동석(Dongseok Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To reduce deaths and injuries that occur in accidents involving pedestrians, all new types of motor vehicle for European market from 1 October 2005 have to fulfill the legal requirement which limit the values of lower legform injury and child head form injury. To satisfy the proposed pedestrian requirements, the design for pedestrian protection scheme should be considered from the early stage of vehicle development. However, it is not easy to build full vehicle finite element model in early stage of vehicle development, especially in styling phase, because the geometry data for finite element model are not sufficient in this stage. The project has been undertaken to propose the design guidelines on the front structures of the vehicle. The process was carried out in conjunction with MADYMO Multi-body modeling and Design of Experiments (DOE) study.
승용차의 56kph 정면 충돌 시 차체 감속도 Pulse 개선 연구
배현우(Hyunwoo Bai),홍철기(Chulkee Hong),임종현,김동석(Dongseok Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Since 1999 Korea NCAP(New Car Assessment Program) has been crash testing vehicles and publishing results to provide new vehicle consumers, when making a purchasing decision, independent advise on occupant protection. During the life of the NCAP program there have been significant improvements in the occupant safety performance of vehicles. In Korea NCAP 56kph crash test the deceleration pulse is very important factor for occupant safely. Firstly an analysis of crash test data of small proto type vehicle, known changes to vehicle specification, is undertaken to review the effect in deceleration pulse. And in this study we will consider about influence of engine, transmission and structural strength.