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[차량운동성능부문] 차체 구조의 중형 버스 브레이크 저더에 대한 영향 해석
강희용(Heeyong Kang),양성모(Sungmo Yang),김종규(Jongkyu Kim),한갑수(Kapsu Han),이동헌(Dongheon Lee) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the high speed driving conditions, the vibrational phenomena with relation to chassis system are becoming more important factors in chassis design and development. In this paper, to verify the effects of a body structure in brake judder, body structure is modeled in flexible. Mode shapes and frequencies are obtained from Commercial FEA program in the same condition of experimental test. Commercial dynamic program is used to model and analyse a middle size bus for brake judder phenomenon. The simulation results are compared to the experimental results and summarized
강윤식(Yunsik Kang),강희용(Heeyong Kang),양성모(Sungmo Yang),송준혁(Joonhyuk Song),이성기(Sungki Lee),김쾌만(Queman Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, the virtual test techniques using computer has widely been used to reduce cost and time during vehicle component development period. So the analysis and test technique is required to predict, estimate, and validate the design specification such as forces acting to parts in the level of developing and designing. In this paper, we applied this virtual testing method to an analysis of strength test and thermal shock test of brake oil reserver in used commercial vehicles. In oder to analyze the stress of this component, we need to conduct structure & thermal Finite Element Analysis and techniques study. First, this research have dealt in analyzing process according to test standard. Then the brake oil reserver for sufficient strength has been investigated.
강윤식(Yunsik Kang),강희용(HeeYong Kang),양성모(Sungmo Yang),이성기(Sungki Lee),김쾌만(Queman Kim),남기원(Giwon Nam) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
This paper present using the CAE to give Structure & Thermal Stress Analysis of a Brake Oil Reserver in Commercial Vehicles for pre-design test of Strength test and Thermal shock test. Brake Oil Reserver is the important component of brake system for vehicle safety. So it need sufficient design investigation according to test standard. CAE(Computed Aied Engineering) is essential to test and evaluate at design phase, because if design exchanged more time and expense will be wasted after production.
강윤식(Yunsik Kang),손승완(Seungwan Son),강희용(Heeyong Kang),양성모(Sungmo Yang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In the part of break system components, the oil reservoir bracket is installed and related to the safety under various driving and thermal conditions including different ranges of acceleration. The robust design is required to predict the life cycle of the bracket. This paper presents VPD(Virtual Product Development) technique used to analyze the durability of an automotive oil reservoir bracket using CAE(Computer Aided Design). Since the durability test was performed using the dynamic model of oil reservoir & bracket, dynamic stresses are applied to predict the life cycle of component by MSC. Fatigue. Finally, the life cycle are obtained for the design modification of the automotive oil reservoir bracket.
강윤식(Yunsik Kang),강희용(Heeyong Kang),이교우(Gyowoo Lee),양성모(Sungmo Yang),김민수(Minsoo Kim),이성기(Sungki Lee),김쾌만(Queman Kim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, weight reduction for an automobile component has been sought to achieve fuel efficiency and energy conservation. So many automobile components is producted by engineering plastic. Therefore this parts is important safety evaluation. In this paper, we presents effectiveness of leaking tester for safety evaluation in battery case made by injection molding. In oder to analyze the stress&displacement of this component, we need to conduct structure Finite Element Analysis. Test condition was decided using this work. And leaking tester is tested using test system, tester function was evaluation. Finally, it was conclude decision standard through results of test. Additionally, safety of impossible test condition is evaluated through FE analysis.
유연체를 이용한 굽힘 모멘트를 받는 자동차용 휠의 피로수명 예측
김석(Seok Kim),강희용(Heeyong Kang),양성모(Sungmo Yang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Automotive wheels undergo repeating stress through variable loads. In order to prevent fatigue fracture of a automotive wheels, it is important to predict the fatigue life. Therefore many company is performed bending fatigue test. In this paper fatigue analysis is performed by two method using compute aided analysis. In the first method, the stress tensor of wheels was obtained from finite element analysis. and sine load history is applied at maximum stress direction. In the second method, this paper is proposed fatigue life prediction method using Modal Stress Recovery. Mode analysis is performed to calculated Modal Stress at each node. And Modal Deformation is obtained dynamic analysis with flexible body of automotive wheels. Fatigue life is calculated by Palmgren-Miner rule. Modal stress. superposition and cycle counting method. For the assessment of high cycle fatigue damage, the absolute maximum principle stress has been calculated in all method. The maximum stress concentration and minimum life cycle occurs the spoke region in two fatigue analysis method.