http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
볼타입 분리볼트 분리 메커니즘의 수치해석 및 간략화 모델링
황대현(Daehyun Hwang),이주호(Juho Lee),한재흥(Jae-Hung Han),이응조(Yeungjo Lee),김동진(Dongjin Kim) 한국추진공학회 2015 한국추진공학회 학술대회논문집 Vol.2015 No.11
파이로테크닉 분리장치는 우주시스템과 유도무기의 발사 혹은 임무 중에 다양하게 활용된다. 파이로 테크닉 작동기는 큰 파이로 충격과 파편을 발생시켜 구조와 전자장비에 치명적인 손상을 야기할 수 있다. 파이로 장치에 의한 문제를 해결하기 위해 1960년대부터 다양한 대체 작동기에 대한 연구와 개발이 수행되어왔다. 본 연구에서는 Pyrotechnic Mechanical Device 중 하나인 볼 타입 분리볼트에 대해 ANSYS AUTODYN을 사용한 동적 분리거동 해석을 수행하였다. 그 결과를 바탕으로 5단계의 분리단계 모델링을 수행하였으며, 연소모델과 1-D로 단순화된 부품의 상호작용에 대한 연립방정식으로 구성된 수학적 모델을 설립하였다. The pyrotechnic separation devices are widely used in space systems and guided weapons during the launching and operations. Pyrotechnic devices generate intensive pyroshock and fragments that can cause critical damages or the malfunction of electric devices onboard. There have been proposed many types of alternative devices to avoid pyro-induced problems since 1960"s. A ball-type separation bolt is the one of alternative pyrotechnic mechanical devices. In this study, the detail separation behavior of the ball-type separation bolt is analyzed using ANSYS AUTODYN; the entire separation process can be divided into 5-Stages. A simplified one-dimensional mathematical model, consisting of a combustion model and 5-stages of differential equation of motions, is also established to effectively describe the entire separation process.
자동차 충돌안전도 해석용 유한요소 인체 모델 개발 : Part Ⅱ 5% 성인 여성 모델
나상진(Sangjin Na),황대현(Daehyun Hwang),사성진(Sungjin Sah),이광희(Kwanghee Lee),영정태(Jungtae Yang),최형연(Hyoungyun Choi),이인혁(Inhyuk Lee),이진희(Jinhee Lee) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
The Small female driver is much more vulnerable during the airbag deployment since they tend to sit on the fore side of seat while driving. In order to evaluate the aggressivity of airbag deployment on small female, so called "Out of Position" problem, it is very often to employ the Hybrid Ⅲ 5% dummy. The lack of biofidelity of Hybrid Ⅲ 5% dummy, however reveals the limits to the understanding of OOP related injury mechanism. Accordingly, a finite element model for small female(5%) has been proposed in this study. As a first step, multi-body rigid model, FARB(Female Articulated Rigid Body) has been developed and validated. Some parametric OOP simulation results will be also presented.
수직진동 하에서 인체동특성과 체압분포의 비교 분석을 통한 유한요소 인체 모델의 검증
사성진(Sungjin Sah),황대현(Daehyun Hwang),최형연(Hyungyun Choi),김영은(Youngeun Kim),이현철(Hyunchul Lee) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
In this study, a finite element human model, H-comfort, has been developed in order to<br/> assess the comfort design of the vehicular seat system in the numerical manner. The<br/> measurements in both numerical simulations and experiments such as distribution of pressure at<br/> the human-seat interface and transmissibility under vertical vibration, have been investigated for<br/> rigid and soft automotive seats. The evaluation was performed for two sitting postures, sitting<br/> with erect not support and reclined with most of the back in contact with reclined backrest.<br/> The simulated responses of the model have been compared with the measurements of subject<br/> and the published experimental results. The model response was found to correlate well with<br/> the experimental measurements.
승차 안락감 평가를 위한 Human Vibration model 개발
최형연(Hyungyon Choi),김영은(Youngeun Kim),박현민(Hyunmin Park),사성진(Sungjin Sah),황대현(Daehyun Hwang) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
Recent trends on the evaluation of riding comfort are mainly focused on the measurements of human-seat interface pressure distributions and the frequency analysis of occupant body segments in both experimental and analytical methods. In this study, a finite element human model, H-comfort, has been developed in order to assess the comfort design of the vehicular seat system in the numerical manner. H-comfort appropriately represents the biodynamic human properties such as transmissibility and mechanical impedances within the concerning ranges of input frequencies (1~20 Hz) and thus can be used as an objective tool in the numerical frequency analysis of occupant. H-comfort can be also utilized to measure the both static and transient human-seat interfacepressure distributions to quantitatively evaluate the comfort design of seat cushion and back. Comparisons of various physical parameters of occupant due to the vertical vibration between the calculation using H-comfort and published experimental results will be introduced in this paper.