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배한결(Hankyul Bae),우준규(Jungyu Woo),유승건(Seunggun Yu),최준형(Junhyeong Choi),현영서(Youngseo Hyeon) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
Recent progress in the vehicle industry has been about making suspension systems lighter and more durable. These systems are key for keeping cars stable and comfortable to drive. However, parts of the suspension, like the lower arm, can often have issues with too much stress. This paper talks about how to deal with these stress problems in the lower arm, aiming to make it last longer. By looking at how much stress happens when changing lanes or braking, we try to figure out how it affects the suspension. Using Taguchi method, we look for the best shape for the lower arm that lowers stress and makes it last longer. Our results show that the best shape for the lower arm can greatly reduce stress and increase its life, while also cutting its weight by about 60%. This study helps a lot in making cars lighter and more durable by finding the best shape for the lower arm.
가이드 베인 개수에 따른 자작 전기자동차 에어 덕트 내부 유동 최적화
김민석(Minseok Kim),신대수(Daesu Shin),정우석(Wooseok Jeong),윤병찬(Byeongchan Yun),강상원(Sangwon Kang),염호현(Hohyun Yeom),현영서(Youngseo Hyeon),하은결(Eungyeol Ha),이상희(Sanghee Lee),최준형(Junhyeong Choi) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
The internal flow of the self-made electric vehicle air duct was optimized according to the number of guide vanes. Existing self-made cars had excessive motor heating problems while driving, and to solve this problem, air-cooled air ducts for self-made cars were designed. The design goal was to maximize the cooling effect by allowing as much flow rate to flow inside the air duct as possible, and the initial model was designed by combining design variables that affect the flow rate in the air duct within space constraints. Internal flow analysis was conducted using Altairs Simlab, and additional guide vanes were devised to remove eddy currents in the duct and control uniform flow. The results of internal flow analysis according to the number of guide vanes were analyzed, and the average flow value at the outlet surface of the air duct was extracted using Simlabs Acuprobe function, and the optimal number of guide vanes was eventually selected. Finally, the cooling effect of the optimal model of the air duct was verified through actual measurement, and ASA Plastic was manufactured in kind using a 3D printing technique.
김민석(Minseok Kim),정우석(Wooseok Jeong),신대수(Daesu Shin),강상원(Sangwon Kang),윤병찬(Byeongchan Yun),이상희(Sanghee Lee),최준형(Junhyeong Choi),염호현(Hohyun Yeom),하은결(Eungyeol Ha),현영서(Youngseo Hyeon) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
To enhance the performance and energy efficiency of electric vehicles, it is imperative to reduce aerodynamic drag. In this study, we devised exterior design improvements aimed at reducing the aerodynamic drag of an electric vehicle created for participation in a student engineering competition. Computational fluid dynamics analysis using SIMLAB was conducted to evaluate the impact of the exterior design on drag reduction compared to the baseline model.