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안전띠 부착구 설치 허용기준에 따른 어린이 충돌안전성 연구
윤영한(Younghan Youn),심소정(S. J. Shim),김광수(K. Kim),손완륜(W. Son),심희섭(H. Sim),이승상 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
According to the police report, the second leading cause of traffic accident fatality of under 12 years old child is on-board child. Also, more than 50% of injured child from traffic accidents is on board of vehicle. It may results from the lower CRS usage rates especially when child is more than 6 yeard old child, most of children wears a adult seatbelt in stead of using booster seat. But the current requirement of seatbelt anchorage locations are suitable for only adults range from 5%tile female to 95%tile larger male. Static measurement of 6 year old child dummy seatbelt configuration were evaluated based on the allowance limits of UN R14 and FMVSS 210 upper and lower seatbelt anchorages points. The assessment parameters of adult seatbelt fitness for the 6 year old Hybrid III dummy were developed such as D1(distance between shoulder and torso belt), α1( angle between shoulder and horizontal line in x axis of vehicle), α2 (angle of diagonal belt path), D2 (distance between abdomen and lap belt), α3 (angle between lower anchorage point and lap belt contour).
승합차의 Bullbar 부착에 대한 보행자 안전도 비교연구
윤영한(Younghan Youn),김동학(Donghak Kim),홍재수(Jaesoo Hong),최영태(Youngtae Choi),윤경한(Kyunghan Yoon) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
This study investigates the positive and negative aspects of bullbar with regard to road trauma through assessment of the headfoam impact test and analysis of pedestrian crash.<br/> The experimental data showed that bullbars pose a great risk in the event of low speed impacts with unprotected road users such as pedestrians.<br/> All of steel bullbar tested have been shown to have a high risk of causing life threatening brain injuries in impacts with the head of children or serious injuries to the abdomen and chest of adults and taller children, even in low speed impact.<br/> Despite the fact that safety appears to be a major reason for fining bullbars, no results were found which attempted to quantify the safety benefits of bullbar.<br/>
보행자 보호기준과 시험법에 대한 어린이 머리 상해치 비교연구
윤영한(Younghan Youn),양재의(Jaeeui Yang),최영태(Youngtae Choi),윤경한(Kyunghan Yoon) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Pedestrian fatalities account for about 44% of all traffic accident fatalities in Korea. In this paper, a series of child headform test and simulation were conducted to evaluate pedestrian protection test protocol describes in the EEVC and IHRA. The developed 2.5㎏ and 3.5㎏ child headform impactors were used to evaluate the effectiveness of these test rigs in the hood component. Results from the simulations, the influence factors such as impact speed, impact angle and headform sizes were evaluate in terms of HIC.
[SAFETY 부문] 후방충돌시 승객의 목상해와 관계된 좌석의 설계변수에 대한 해석적 연구
윤영한(Younghan Youn),구윤태(Yuntae Koo) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The purpose of this study is to suggest a concept of automobile's seat design to reduce occupant's neck injury in rear impacts.<br/> Three parametric studies were performed to find relationship between occupant's neck injury and seat-back characteristics with MADYMO software.<br/> This study shows the effect of relative velocity between strike and struck vehicle with same seat-back characteristics, the effect of seat-back stiffness, and the effect of stiffness of the rotational joint connecting seat-bottom with seat-back on occupant neck injury in rear impacts.<br/> Relative velocity changes of 20km/h, 27km/h, 33km/h, and 39km/h were applied for the simulation. And seat-back stiffness and joint stiffness were increased by 110, 120, 130, 140, 150, 200, and 300% from baseline, respectively.
국내 차량형상에 대한 보행자 머리 및 다리의 상해값 해석
윤영한(Younghan Youn) 한국자동차공학회 2005 한국자동차공학회 Symposium Vol.- No.-
Pedestrian fatalities account for about 44% of all traffic accident fatalities in Korea. In this paper, a series of pedestrian kinematic simulation were conducted to evaluate pedestrian's injury levels. MADYMO's 50%th dummy and 6 year pedestrian dummy were used for 29 domestic vehicle shapes. Results from the simulations, the influence factors such as impact speed, impact angle were evaluated as well as upper and lower leg fracture probabilities based on 50% injury risk.
컴퓨터 시뮬레이션기법을 이용한 고속전철 승객안전도 해석 및 평가
윤영한(Younghan Youn),구정서(Jungsuh Koo),이재완(Jaewan Lee) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
The computer simulation techniques were adopted to evaluate effects of seating positions of passenger under the various accident scenarios. The baseline of compuer simulation model was tunned by the sled impact tests which conducted under the upright and standard seating positions. This study shows the effect of relative velocity between occupant and struck vehicle while occupant is impacted to a front seat"s seatback. Although, base on the current accident scenarios, KHST is performed well enough to protect average adult male occupants. However, Results from the tests indicate small size occupant or higher impact speed may cause sever neck and femur injuries.