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Seat 모듈 내구성 평가를 위한 가속 진동 내구 시험 방법 개발
고웅희(WoongHee Ko),최성진(SungJin Choi),황범진(BumJin Hwang),백홍전(Hongjeon Baek) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.5
Recently it is very highlighted to reduce the energy and fuel consumption of vehicle. Al and Mg material is preferred to reduce weight for fuel efficiency improvement to steel material for body, chassis, seat module, etc. In this paper we developed accelerated vibration fatigue test method and reproduction vibration test method on proving ground in order to durability evaluation of seat module. We tested the made by steel and Mg seat by vibration tester. Fatigue damage spectrum is made by real vehicle test data of general roads and of proving ground to consider operation profile of target PSD. It is proved to be useful to test seat module and is possible to reduce the time and costs.
김정훈(Junghoon Kim),최광성(Kwangsung Choi),박성용(Sungyong Park),이장무(Jangmoo Lee),강상욱(Sangwook Kang),강주석(Juseok Kang),백홍전(Hongjeon Baek) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In most researches on the ride comport analysis of passenger vehicles, the flexibility of the vehicle body has been not considered as an important factor, because the resonance frequencies of the vehicle body related to pitching, yawing and rolling motions are below approximately 10㎐ while the resonance frequencies of the vehicle body related to the flexibility are above approximately 20㎐. Nevertheless, the paper reveals that the modification of the local flexibility (or local stiffness) of the 4 parts on which shock absorbers are mounted in the vehicle body influences the ride comport. A one-dimensional, theoretical model is devised to qualitatively examine the effect of the change of the local stiffness of the vehicle body on the ride comport. Based on the results obtained from the analysis of the one-dimensional model, multi-body dynamic analysis considering the flexibility of the vehicle body is performed using ADAMS and MSC/NASTRAN. More concretely speaking, natural frequencies and mode shapes computed by MSC/NASTRAN are used as input data for multi-body dynamic analysis in ADAMS. It has been confirmed that the ride comport can be improved by appropriately changing the local stiffness of the vehicle body through several simulations using ADAMS. and that the simulation results agree excellently with experiment results.