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체압 분포 측정에 의한 자동차 시트의 승차감 향상에 관한 연구
이영신(Y.S.Lee),박세진(S.J.Park),남윤의(Y.E.Nahm) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
This paper discusses design parameters for automotive seats intended to meet the design objective: comfort. For comfort, various ergonomic and human factors considerations has been discussed. The ride comfort is the most important indices which decide the performance of automotive seats. The improvement of automotive seating systems, particularly for the driver, has been the subject of intense interest. In our study we have attempted to determine a method for objectively evaluating seating comfort. Seven different driver seats are subjectively evaluated for seating comfort under static conditions. The following objective data for these seats, body pressure distribution, is investigated and compared with the subjective evaluation. The pattern and ratio of the body pressure distribution are found to well correlate with the difference between comfortable and uncomfortable seats. The result is that an evaluation for seating comfort is possible using the objective method of body pressure distribution pattern and ratio.<br/>
이영신(Y.S.Lee),강이석(E.S.Kang),김동진(D.J.Kim),김영대(Y.D.Kim),김의석(E.S.Kim),김충현(C.H.Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
The dynamo bed structure was analyzed, designed and integrated. The maximum stress of bed structure was varied from 4.66MPa to 0.52MPa with the upperplate thickness variation from 10mm to 30mm. The maximum deflection of bed structure was ranged from 0.002mm to 0.0l6mm. The natural frequency of bed structure was decreased with mass of bed plate. The 2-D.O.F bed supporter was designed to support the forced vibraton of engine.<br/> <br/>
벨로우즈의 고유진동수 해석 및 간편식 개발에 관한 연구
이영신(Y.S.LEE),윤기석(K.S.Yoon) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents the simplified formulas for calculating the fundamental frequencies of the cantilevered bellows in the axial and lateral directions. The frequencies of the bellows are evaluated based on analogies with those of the beam. It is shown that the results calculated by the simplified formulas. FEM and experiment are in good agreement.<br/>
이영신(Y.S.Lee),김동진(D.J.Kim),강근희(G.H.Kang),오종수(J.S.Oh) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
The purpose of this study was to trace impact quantity. This study was progressed finite element method with ABAQUS/Explicit and experimental method with drop type impact tester. The geometric parameters of the multi-layered impact programmer with aluminum plates were analyzed with ABAQUS. The impact energy parameters of conical impact programmer made by polyurethane were analyzed with experimental method. The effects of the the number of aluminum plates and impact velocity were studied. The maximum impact force was proportional to impact energy, and the impact energy was decreased with the number of aluminum plates<br/>
[論文] 주퇴충격하중을 받는 궤도차량 구조물의 천이응력해석<br/> [論文] 주퇴층격하중을 받는 궤도차량 구조물의 천이응력해석
이영신(Y. S. Lee),김용환(Y. H. Kim),이기두(K. D. Lee),김영완(Y. W. Kim),안충호(C. H. Ahn),김동수(D. S. Kim),성낙훈(N. H. Sung) 한국자동차공학회 1993 오토저널 Vol.15 No.3
In this study, the transient impact structural stress analysis of tracked vehicle structures under recoil impact load is investigated. ANSYS, ABAQUS Code are used for modelling and analytical procedures. The highest maximum Tresca stress occurs on race ring portion and its stress level is (σ_T)_max=20~40kgf/㎟. The second highest stress occurs on upper plate of chassis and down plate of turret. The maximum stress level increases with loading direction and elevation angle. The results from linear static load analysis are very much different with impact analysis. Therefore, the practical solutions of structures under impact load can be obtained by only nonlinear transient impact analysis. The impact stress analysis of the steel vehicle structures is conducted. The maximum stress level is less than (σ_T)_max=20~40kgf/㎟. So, the design concept of steel structures can be adapted for new alternatives.