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차대차 추돌시험 및 WITKit 시뮬레이션을 통한 경추염좌 상해 실증 연구
임종훈(Jonghun Lim),임남경(Namkyung Lim),심상우(Sangwoo Shim),이재원(Jaewon Lee) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
Whiplash injuries in low speed rear-end accidents cause many social problems such as excessive medical claim costs and moral hazards. In 2011, the number of injuries by rear-end collision accidents is about 0.7 million, which accounts for 54.2% among total injuries of car insurance in Korea. More than 99% of injured person by rear-end collision accidents is minor injured under AIS2. The aim of this study is to determine whiplash injury risk in very low speed(△V=6km/h) rear-end crash test and to analyze the whiplash injury by simulating the accident scenario with WITKit system. To accomplish this purpose, car to car rear-end crash test and WITKit simulation were carried out. BioRID-II was seated in the target vehicle and Neck injury criteria(NIC, Nkm), head contact time and max & mean vehicle accelerations were calculated from the values like accelerations, forces and moments. These actual test results were input into WITKit system. The whiplash injury risk in low speed traffic accidents was critically low. It is found that there is a correlation of whiplash injury risk between rear-end crash test and WITKit simulation result.
동일 승용차량에 대한 RCAR 신ㆍ구 충돌시험을 통한 차체 충돌특성에 관한 연구
임종훈(Jonghun Lim),박인송(Insong Park),허승진(Seungjin Heo) 한국자동차공학회 2006 한국 자동차공학회논문집 Vol.14 No.6
This research investigates vehicle structure acceleration and vehicle deformation with RCAR crash test. To investigate vehicle damage characteristics in an individual case, it is possible to RCAR low speed crash test. In this study, two tests were conducted to evaluate difference between RCAR new condition and RCAR old condition. A two large vehicles were subjected to a frontal crash test at a speed of 15㎞/h with an offset of 40% 10° angle barrier and flat barrier. The results of the 15㎞/h with an offset of 40% 10° angle barrier revealed high acceleration value on the vehicle structure and high repair cost compared to the RCAR 15km/h with an offset of 40% flat barrier. So in order to improve damage characteristics in low speed crash of vehicle structure and body component of the monocoque type passenger vehicles, the end of front side member and front back beam should be designed with optimum level and to supply the end of front side member as a partial condition approx 300㎜.
임종훈 ( Jonghun Lim ),이홍 ( Hong Lee ) 한국중견기업학회 2021 중견기업연구 Vol.8 No.2
본 연구의 목적은 외재적 동기와 창의성 간의 관계에 대한 연구 결과의 혼재를 살펴보고 이를 어떤 시각에서 바라보아야 하는가에 대한 대답을 제시하는 데에 있다. 이를 위해 외재적 동기와 창의성의 관계에 대해 논의한 문헌들을 탐구하는 문헌 연구를 실시하였다. 그 결과 연구자별로 외재적 동기를 어떻게 이해하느냐에 따라 외재적 동기와 창의성 간의 관계를 달리 관찰하고 있으며, 이 같은 혼란은 고스란히 외재적 동기가 창의성에 미치는 영향에 대한 연구 결과 혼재로 이어짐을 확인할 수 있었다. 외재적 동기는 통제적 동기와 지원적 동기로 나눌 수 있는데 통제적일수록 창의성에 부정적인 영향을 미치며 지원적일수록 긍정적 영향을 미칠 수 있음을 문헌정리를 통해 확인하였다. 이에 대한 이론적 및 실무적 의미에 대하여 논의하였다. As competition between companies intensifies today, creativity has become the core of corporate management. The aim of this study is to examine the mixed research results on the relationship between extrinsic motivation and creativity, and to provide an answer to how to fix it. To this end, this study explored the prior literature on the relationship between extrinsic motivation and creativity. As a result, it was found that researcher has observed the relationship between extrinsic motivation and creativity depending on how they understand extrinsic motivation, resulting in the confused results regarding this relationship. This study confirmed through literature review that extrinsic motivation can be divided into controlling motivation and supportive motivations and controlling and supportive extrinsic motivation negatively and positively impact creativity, respectively. The theoretical and practical implications of this study were also discussed.
MTO 공정을 위한 상온 순환유동층 장치의 수력학적 특성의 측정 및 유동모사
임종훈(Lim, Jonghun),이동현(Lee, Donghyun),박상순(Park, Sangsoon),채호정(Chae, Hojeong),정순용(Jeong, Soonyong) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
MTO 공정을 개발하기 위한 순환유동층 장치에서 고체순환량을 높이기 위해 고체 주입량 및 상승관 유속에 따른 수력학적 특성의 파악에 관한 연구를 수행하였다. 전체 높이 2.6m 직경 0.009m의 상승관을 가진 순환유동층 장치에 대해 고체순환량을 조절하기 위한 비기계적 밸브로 각각 Seal-pot과 L-valve가 장착된 두 장치에 대해 고체순환량 및 체류량을 측정하였다. 고체순환량 및 체류량은 두 장치에서 모두 고체의 주입량이 증가함에 따라 증가하는 모습을 나타내었으며, 상승관의 유속에 따라서는 특정한 유속의 범위 내에서 증가하다가 일정 유속 이후 감소하는 모습을 나타내었다. Seal-pot을 사용한 장치에서는 고체순환량이 최대 87kg/m².s 가량의 값을 나타내었으나 L-valve를 사용한 장치에서는 최대 180kg/m².s를 보였다. 이러한 실험 결과를 바탕으로 하여 전산유체역학을 이용한 순환유동층의 유동해석에 관한 연구를 실시하여 실험조건의 변화에 따른 상승관 내부의 수력학적 특성을 비교하였다.
동일 플렛폼 차량에 대한 저속 충돌시 손상성 수리성에 미치는 영향에 관한 연구
임종훈(Jonghun Lim),박인송(Insong Park),허승진(Seungjin Heo) 한국자동차공학회 2005 한국 자동차공학회논문집 Vol.13 No.2
The damageability and repairability of similar platform type vehicles could be very concerned with design optimization. In all the vehicles crash tested. small size passenger vehicles were weakness in aspect of damageability and repairability. The most critical area appears to be repair cost considering that parts cost is the largest portion of total repair cost segments. Besides repair cost. attaching method of front sidemember and sub frame are placed special importance for impact energy absorption and damageability and repairability. So in order to improve damageability and repairability of vehicle structure and body component of the monocoque type passenger vehicles. the end of front side member and front baek beam should be designed with optimum level and to supply the end of front side member as a partial condition approx 300㎜. The effectiveness of design concept on the 40% offset frontal impact characteristics of the passenger vehicle structure is investigated and summarized.
경·소·대형 중고 승용차량에 대한 차 대 차 충돌시험을 통한 차체변형 및 인체상해 특성에 관한 연구
임종훈(Jonghun Lim),박인송(Insong Park),허승진(Seungjin Heo) 한국자동차공학회 2005 한국 자동차공학회논문집 Vol.13 No.6
Currently many safety assessment tests are conducted by crashing a vehicle against a rigid or deformable barrier. It is quite rational to evaluate crash performance of a vehicle in a barrier test in terms of vehicle stiffness and strength. However, there has been a lot of debate on whether barrier testing is a duplicate of real world crash collisions. One of the issues is car to car compatability. There are two essential subjects in compatability. One is partner-protection when crashing into another vehicle and the other is self-protection when struck by another vehicle. When considering a car to car frontal crash between a mini car and a large heavy car, it is necessary to evaluate human body stiffness of each vehicle. In this study, in order to evaluate the compatability of cars in car-to-car crashes, four tests were conducted. Test speed of each car is 48.3km/h, and the overlap of the mini and large car is 40%, and the overlap of the small cars is 100%. In all tests, only a drive dummy is used. The test results of the car to car crash test show that vehicle safety standard of mini car is not satisfied compared with large heavy car and HIC value of mini car is higher than large car. In this case observed that the relatively lower stiffness and weight of the mini car resulted in absorbing a large share of the total input energy of the system when crashed into the large heavy car.
Bayesian과 Bootstrap 방법을 이용한 수위-유량 관계곡선의 불확실성 분석
임종훈(Jonghun Lim),권형수(Hyungsoo Kwon),주홍준(Hongjun Joo),왕원준(Won-joon Wang),이종소(Jongso Lee),유영훈(Younghoon You),김형수(Hungsoo Kim) 한국습지학회 2019 한국습지학회지 Vol.21 No.2
본 연구는 수위-유량 관계곡선을 이용한 하천 유량 산정방법의 불확실성을 감소시키는 것을 목적으로 하였다. 하천 유량 자료는 수문해석과 수자원 관리를 하는데 있어서 필수적으로 요구되는 자료이기 때문에 정량적으로 정확한 산정 방법을 고찰할 필요가 있다. 이를 위해 Bayesian 및 Bootstrap 방법을 이용한 수위-유량 관계식의 매개변수와 기존의 매개변수를 비교하였으며, 불확실성을 평가하기 위해서 표준오차법에 -분포를 적용한 추정치 결과의 신뢰구간을 비교하였다. 그 결과, 본 연구를 통해 개발된 회귀분석에 의한 추정값은 약 1~5 %미만의 차이가 보이며, 각 지점에서 수위에 따라 기존보다 더 적용성이 우수한 결과를 보이는 부분도 존재함을 확인하였다. 따라서 본 연구에서 제시한 방법별로 하천의 특성 및 수위에 맞게적용한다면 보다 더 신뢰성 있는 유량 자료를 확보할 수 있을 것으로 생각된다. The objective of this study is to reduce the uncertainty of the river discharge estimation method using the stage-discharge relation curve. It is necessary to consider the quantitative and accurate estimation method because the river discharge data is essential data for hydrological interpretation and water resource management. For this purpose, the parameters estimated by Bayesian and Bootstrap methods are compared with the ones obtained by stage-discharge relation curve. In addition, the Bayesian and Bootstrap methods are applied to assess uncertainty and then those are compared with the confidence intervals of the results from standard error method which has t-distribution. From the results of this study, The estimated value of the regression analysis developed through this study is less than 1 ~ 5%. Also It is confirmed that there are some areas where the applicability is better than the existing one according to the water level at each point. Therefore, if we use more suitable method according to the river characteristics, we could obtain more reliable discharge with less uncertainty.
임종훈(Jonghun Lim),박인송(Insong Park),허승진(Seungjin Heo) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The damageability and repairability of similar platform type vehicles could be very concerned with design optimization. In all the vehicles crash tested, middle size passenger vehicles were weakness in aspect of damageability and repairability. The most critical area appears to be repair cost considering that parts cost is the largest portion of total repair cost segments. Besides repair cost, attaching method of front side member and subframe are placed special importance for impact energy absorption and damageability and repairability. So in order to improve damageability and repairability of vehicle structure and body component of the monocoque type passenger vehicles, the end of front side member and front back beam should be designed with optimum level and to supply the end of front side member as a partial condition approx 300㎜. The effectiveness of design concept on the 40% offset frontal impact characteristics of the passenger vehicle structure is investigated and summarized.