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[안전/타이어운동특성부문] 경사하중을 받는 정사각 박판부재의 붕괴 거동
박제승(J.S.Park),박신희(S.H.Park),한동철(D.C.Han) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The crush behavior of a square column subjected to oblique loads. which is undergoing both axial and bending collapses. is analyzed. Oblique load conditions in numerical simulations are realized by means of impacting the column on a declined rigid wall with no friction. Mean crush loads corresponding to load angles are investigated with such geometrical parameters as thickness. width and length. Results show that there is a critical load angle in which a transition takes place from axial collapse mode to bending collapse mode. And then the dimensionless mean crush load is employed from normalizing the mean crush load with analytical axial mean crush load and bending moment equations. It is expressed as the function of only one variable. the load angle. Finally. the formulation for the mean crush load is developed in terms of geometrical parameters and the critical load angle
[안전부문] 유압완충기를 장착한 차량 윤한요소모델의 충돌특성에 관한 연구
최정흠(J.H.Choi),이인혁(I.H.Lee),박제승(J.S.Park),한동철(D.C.Han) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
In this paper, a study on the frontal crash behavior of car-body finite element model with hydraulic cushioner was performed. The hydraulic element were modeled mathematically. And then vehicle structure were modeled by the simplifed vehicle structure modeling method using nonlinear springs, beam elements, and hydraulic cushioner elements. The results were compared with those from the simulations at low speed(10km/h) and high speed(50km/h). At low speed, hydraulic cushioners are predominant. At high speed, the side-rails are predominant.