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한재녕(Jae-nyung Han),박정수(Jung-Su Park),채수원(Soo-won Chae) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
This paper presents a full hexahedral mesh generation by plastering for three-dimensional geometries. In this method, hexahedral elements are generated inward by offsetting from initial boundary mesh. When the elements intersect with each other after offsetting, overlapped elements are improved by node relocation method. In order to construct conforming mesh, pyramid elements are added to all hexahedral elements on the meshing front. With this process unmeshed regions are covered with triangular elements and tetrahedral elements are then generated at unmeshed regions. Finally pyramid and tetrahedral elements are subdivided into hexahedral elements using the Geode algorithm. Sample meshes for several geometries are presented to demonstrate the effectiveness of the proposed algorithm.
김동훈(Dong-Hun Kim),한재녕(Jae-Nyung Han),김성용(Seong-Yong Kim),김동석(Dong-Seok Kim),채수원(Soo-Won Chae) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Most of the research efforts on a safety belt system have been made for crash simulation by only considering a dynamic human model so far. However, belt routing analysis usually known as comfort level estimation is also an important factor in safety belt design, considering that serious injuries of abdominal region result from the infiltration of belt into a neck or a chest. Thus safety belt evaluation using kinematic human models is also needed. Pre-simulation method in using MADYMO has been suggested in this study, which enables the routing results by eBTD being transferable to MADYMO input successfully. With the proposed process both comfort and safety analysis can be performed under the same conditions continuously, and thus the safety belt design parameters such as the location of anchor points, dummy posture and etc. can be evaluated. In conclusion, this process can be employed easily in the early stage of safety belt system design.
강현대(Hyun-Dai Kang),한재녕(Jae-Nyung Han),채수원(Soo-Won Chae),김동석(Dong-Seok Kim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Most of the research efforts on a safety belt system have been made for crash simulation by only considering a dynamic human model so far. However, belt routing analysis usually known as comfort level estimation is also an important factor in safety belt design, considering that serious injuries of abdominal region result from the infiltration of belt into a neck or a chest. Thus safety belt evaluation using kinematic human models is also needed. Belt fit simulation method in using MADYMO has been suggested in this study. With the proposed process both comfort and safety analysis can be performed under the same conditions continuously, and thus the safety belt design parameters such as the location of anchor points, dummy posture and etc. can be evaluated. In conclusion, this process can be employed easily in the early stage of safety belt system design.
오은경(Eun-kyung Oh),한재녕(Jae-nyung Han),손창규(Chang-kyu Son),채수원(Soo-won Chae) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
According to the recent study, smaller passenger such as women could be damaged from safety belt than male because of differences in physical. So safety belt research focused on female passenger has been conducted. Actual test is both costly and time consuming. Crash simulation using LS-DYNA which was developed in previous study was used to replace actual test. However, generally a large number of the design parameter’s levels cause many numerical cost for direct optimization same as actual test. In this research, in order to avoid those numerical costs, metamodel of LS-DYNA crash simulation was derived using LS-OPT. Furthermore, optimal combination of safety belt’s design parameter was obtained. To derive the metamodel, response surface method was used and the simulation sampling was conducted by central composite.
동승자 상해에 영향을 주는 안전벨트 설계인자에 대한 연구
김윤배(Yun-Bae Kim),한재녕(Jae-Nyung Han),김형일(Hyungil Kim),채수원(Soo-Won Chae) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Most of the research efforts on a safety belt system have been made for crash simulation by only considering the driver of the trajectory dynamic human body model. However, FMVSS and USNCAP enhanced interest in the safety of passengers is increasing gradually. Existing simulation by the wrong seat belts suffered injuries in the neck and the chest. Seat belts for the safety of the occupant are an important design parameter. Therefore, to ensure the safety of occupants of the seat belt system to determine the value of the occupant of the injury, as well as dynamic human model for safety belt, you might consider trajectory kinematic human model should be used. In this study, safety belt in order to meet the needs of the design parameters is presented. Through simulation, the design parameters of each passenger’s injuries were evaluated by on the basis of this argument, each designed by a passenger’s injuries were tendencies. This design of a safer seat belt system designed for the optimal combination of elements of the seat belt was found.