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2018 KSAE 대회를 위한 자작전기자동차의 설계와 제작
엄현식(Hyunsik Um),이관률(Kwanyul Lee),최용원(Yongwon Choi),한동완(Dongwan Han),이지은(Jieun Lee),이종선(Chongsun Lee) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
We designed a electric vehicle for 2018 KSAE competition. To reduce the weight of our vehicles, we used a magnesium extruded material AZ61 which is developed by POSCO, and also adopted a cross-shaped reinforcement inside the frame to compensate for the lack of strength and rigidity compared to steel. We designed 3D model of our electric vehicle, and implement structural analysis and vehicle dynamic analysis of parts that can be affected by load, with checking safety factor and the stability as well. We could not complete the race due to unexpected problems as a result of participating in the contest without test driving. We will expect good result with sufficient vehicle inspections and test driving for the next competition.
박하영(Hayoung Park),김시은(Sieun Kim),유성윤(SungYoon Yoo),이종선(Chongsun Lee) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
This study aims to improve the weight and stability by optimizing the structure of bumper system. Prior to the section design, ANSYS low speed collision simulations were performed for each material speed, and thickness using a closed D-type bumper beam model and parameters affecting the bumper performance were searched. The bumper beam performance was compared based on stress, deformation, plastic strain and weight. The performance of the bumper beam according to the sectional shape is important in terms of production cost saving and energy efficiency. Based on the results of this study, we will analyze and compare the performance of C and I type bumper beam and design an effective cross section design.
자작 전기 자동차의 이종 금속 활용 너클 설계 및 구조해석
박은석(Eunseok Park),김형민(Hyungmin Kim),김영승(Youngseng Kim),이종선(Chongsun Lee) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
This paper presents a new design and structural analysis of hand-made EV knuckles constructed with two different metals. Aluminum was used as the base material to reduce weight and steel was used as the HUB bearing house in the central region of the knuckle to enhance structural safety. Thermal stresses caused by the HUB bearing were simulated together with stresses caused by the external forces developing at the joints of lower control arm and upper control arm when the vehicle experiences a 30 degree step steering at 60Km/h. Our analyses also include experiences of structural failure of the HUB bearing and spindle shaft during the driving practice of the vehicle, and hence a modified design was suggested to guarantee enough safety. Structural analyses of the new knuckles were found to give appropriate safety factors under the maximum temperature condition of the HUB bearing and severe cornering condition of the vehicle such as the slalom test.