http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제주해협 HFR 자료의 유효 범위 산정과 M<sub>2</sub> 조류 특성 분석
오경희,이석,박준성,송규민,정다운,Oh, Kyung-Hee,Lee, Seok,Park, Joonseong,Song, Kyu-Min,Jung, Dawoon 한국해양과학기술원 2020 Ocean and Polar Research Vol.42 No.2
The effective range of surface current data observed by high-frequency radar (HFR) operated in the northern coastal area of Jeju Island by Korea Institute of Ocean Science and Technology was estimated and the distribution and variability of the M<sub>2</sub> tidal current of the Jeju Strait was analyzed. To evaluate the HFR data, the M<sub>2</sub> tidal current corrected from 25 hours current data observed by the Korea Hydrographic and Oceanographic Agency (KHOA) was compared with the M<sub>2</sub> tidal current in the Jeju Strait analyzed from the surface currents of HFR. The reliability of HFR data was confirmed by analyzing the characteristics of the tide components of these two data sets, and the effective range of HFR data was estimated through temporal and spatial analysis. The observation periods of HFR used in the analysis were from 2012 to 2014, and it was confirmed that there is a difference in the effective range of HFR data according to the observation time. During the analysis periods, the difference between the M<sub>2</sub> current ellipses from the data of KHOA and the HFR was greater in the eastern than in the western part of the Jeju Strait, and represented a high reliability in the western and central parts of the Jeju Strait. The tidal current of the Jeju Strait analyzed using the HFR data revealed a seasonal variability a relatively weak in summer and a strong in winter, about a 17% fluctuations between the summer and winter based on the length of the semi-major axis of tidal ellipse. Appraisals and results of regarding the characteristics and seasonal variability of the M<sub>2</sub> tidal current in the Jeju Strait using HFR data have not been previously reported, so the results of this study are considered meaningful.
RCAR 전방저속충돌을 위한 Front Bumper System 설계방법 연구
권진택(Jintaek Kwon),박준성(Joonseong Park),권남석(Namseock Kwon) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The insurance rating has been differentiated in grades according to cost of repair for damaged vehicles and has been an important consideration point for customers, when they buy a new vehicle. The RCAR (Research Council for Automobile repairs) has evaluated low speed damageability and reparability of vehicle. Vehicle manufacturers are going to try to reduce the repair cost by designing vehicles with the intent to minimize damage sustained in low speed crash. The absorbed collision energy to bumper system is important for the vehicle which has bumper system with upper bumper and lower bumper system. If upper crush can and lower crush can has not suitable load distribution ratio, the vehicle body has permanent deformation. This paper demonstrates an important thing of load distribution ratio by vehicle load path. Then vehicle body has not permanent deformation and reducing repair cost and improving damageability.
지성호(Sungho Ji),이덕규(Deokkyu Lee),박준성(Joonseong Park),김용석(Yongsuk Kim) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
As Euro NCAP implemented grid method test of pedestrian protection from 2013, Correlation between test and simulation is a matter which is increasingly important in the vehicle safety. Because pedestrian grid validation need about 150 impact point in a vehicle and it is difficult that all of impact points have test performances. This study is about bonnet damper made of rubber to improve correlation accuracy. In Vehicle CAE filed, damper is used to absorb impact energy or prevent slam with several modeling method of simulation programs depend on characteristic. Our study about material characteristics of bonnet damper will help to understand how much influence on pedestrian injury and what is best way to represent damper property in pedestrian head crash impact with LS-DYNA simulation program.
전방충돌시 상해치 감소를 위한 프로펠러 샤프트 스웨이지 연구
조규언(Kyueun Cho),김남준(Namjun Kim),박준성(Joonseong Park) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
Recently, small SUVs are the best seller in the automotive market. In general, small SUVs have the limited crushable zone that can absorb crash loads due to the small engine room and are vulnerable to passenger safety. In particular, unlike frontwheel drive, the all-wheel drive vehicle has a propeller shaft for strong power transmission in the longitudinal direction, so that a larger load is engaged to the passenger through the vehicle body and thus relatively weak to passenger injuries in the full-frontal crash. As a way to compensate for this, a swage is added on the propeller shaft to absorb the load at an appropriate timing to reduce the load delivered to the vehicle body. In this paper, we construct a model that reflects the specifications of commercially available all-wheel drive small SUVs, and derive the optimum swage by measuring the change of acceleration value according to the various position, length and shape of the swage in the USNCAP 56KPH Full Frontal Test.
시트벨트 부착장치의 점용접부 강도평가를 위한 모델링 기법 연구
김경민(Kyungmin Kim),김동석(Dongseok Kim),박준성(Joonseong Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The seat belt is an equipment to protect a passenger in a car crash. In order to perform the function of seatbelt, the seat belt anchorage should be integrated into the body. The strength of the seat belt anchorage is required in several regulations such as FMVSS, KMVSS, ECE R14. Recently, they can be evaluated by using computer simulation in the beginning of vehicle development. Usually, the seat belt anchorage is attached to body by using bolt, nut and spot weld. Therefore we should build more precise computer simulation model for spot welds, bolt and nut in order to evaluate accurate stiffness. The most failure modes are occurred in the area of spot weld. Therefore, this research focuses the modeling of spot welding for the seat belt anchorage to predict failure mode.
고속 충돌 시 범퍼 폼이 주는 차량 가속도에 대한 연구
권진택(Jintaek Kwon),박종민(Jongmin Park),박준성(Joonseong Park) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Recently, vehicle makers is trying to meet vehicle consumer’s demands of best safety vehicle from beginning of development step to launch step. For strengthen regulations of all countries of the world and consumer metrics safety targets, vehicle makers are trying to reduce occupant injury. When vehicle crash, we have to find the suitable vehicle acceleration is. Then suitable vehicle acceleration can positive impacted greatly on the occupant injury. When we use dual density bumper foam, we can change the vehicle acceleration. And we recognize the necessity of density of dual density bumper foam combination.