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후륜 서브프레임 고유 진동 특성 설계 효율 증대를 위한 구성 요소 영향도 연구
고광진(Gwangjin Go),강창존(Changjon Kang),이계호(Kyeho Lee) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5
Subframes used in rear-wheel chassis of automobiles have target stiffness values for each behavior mode in order to have the handling and NVH performance required to drive. In this study, to analyze the influence of each part composing the product on natural frequency, we divided the product named subframe into several sub-parts and panels. Then, the values were derived through the natural frequency analysis of the product in various cases where the thickness of the sub-parts and panels was changed. Finally, the influence of sub-parts and panels on the product’s natural frequency was analyzed using the the taguchi method, and the process and conclusion were shown. This study can help to design the stiffness of the subframe.
최동욱(Donguk Choi),강창존(Changjon Kang),윤석진(Sukjin Yoon),이계호(Kyeho Lee),박민수(Minsoo Park) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
It need to study of increasing chassis stiffness without increasing their weight because of environment and oem`s competitiveness. So this paper describes a study on the effect of durability due to trailing arm`s stiffness optimization by topography. The study shows that optimization by topography can make trailing arm better stiffness, Input load is inversely proportional, and Durability is not completely proportional to stiffness.
고유진동수 증대를 위한 위상최적화 기반 알루미늄 서브프레임 리브 구조 설계
고광진(Gwangjin Go),강창존(Changjon Kang),이계호(Kyeho Lee),김진성(Jinseong Kim),김준년(Junnyeon Kim) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
Lightweight material such as aluminum are being applied to chassis parts along with the recent trend of switching to electric vehicle. In the case of aluminum, it is easy to reduce weight to its high specific strength. But since the stiffness of material is low, a technology that can place the material in an appropriate place is required for the product to have sufficient performance. In this study, the process of optimizing the front subframe made of aluminum through the topology optimization technique is introduced so that it has a target stiffness value with minimal weight.
고광진(Gwangjin Go),강창존(Changjon Kang),이계호(Kyeho Lee) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Subframe used in rear-wheel chassis of automobiles has target stiffness values for each behavior mode in order to have the desired handling and NVH performance required during driving. In this study, to facilitate design, there are the main factors affecting increase and decrease of frequency in each mode of the natural frequency among the various shape design factors of the product. Also, the frequency sensitivity of the factors compared to the change of weight is derived by reflecting the weight caused by the change of factor’ level in the sensitivity of the main design factors.
후륜 서브프레임 NVH 보강 레일 설계 개선에 대한 연구
이민구(Mingu Lee),강창존(Changjon Kang),고광진(Gwangjin Go),윤석진(Sukjin Yoon),이계호(Gyeho Lee) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
This paper introduces a study on the design improvement of the NVH reinforcement rails of the rear subframe, a vehicle suspension component. The NVH reinforcement rails directly reduce excessive behavior of parts in certain modes in which the NVH problem occurs in the vehicle. The rear subframe is a heavy component and requires an optimal design in terms of the weight and performance of the NVH reinforcement rail to improve NVH performance of the vehicle. In this paper, the performance and weight of the NVH reinforcement rail were optimized, and the effect of the improvement design was verified in terms of its natural frequency.
크로스 멤버 및 PE 모듈 조립 공차해석 방법론에 대한 연구
최동욱(Donguk Choi),강창존(Changjon Kang),이계호(Kyeho Lee),김민재(Minjae Kim) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
It need to study how to analyze tolerance in the Assembly of Cross member and PE module. Because This structure is complicated but very important for electronic vehicle`s industry. So, this paper shows a methodology of analyzing tolerance. First, make cases of constraining 6 DOF with X, Y, Z elements. Next, when choose `Align` element, Use the clearances of hole and pin. Because these clearances are smaller than width of bracket`s. Last when choose `Stop` element, Pick the smallest clearance of hole and pin or check and follow the sequence of assembly process in factory.
최동욱(Donguk Choi),문가람(Karam Moon),강창존(Changjon Kang),이계호(Kyeho Lee) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
It need to study which Rear Cross Member Body mounting`s structures are applied to many kinds of car, and which one is better at fatigue strength. So, this paper describes a study of Body Mounting`s structure. The study shows that Increasing the trim line of body mounting`s panel until the welding bead line`s angle is over 180 degree is effective way to enhance the fatigue strength.