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황석철(Seok-Cheol Hwang),김종규(Jong-Kyu Kim),서선민(Sun-Min Seo),김영준(Young-Jun Kim),이동우(Dong-Woo Lee),박영철(Young-Chul Park),이권희(Kwon-Hee Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Ball joint is a rotating and swiveling element that is typically the interface between two parts. In an automobile, the ball joint is the component that connects the control arms to the steering knuckles by playing a role of bearing. The ball joint can also be installed in linkage systems for motion control applications. This paper describes the simulation strategy for a ball joint analysis, considering manufacturing process. Its manufacturing process can be divided into plugging and spinning. Then, the interested response is selected as the stress distribution generated between its ball and bearing. In this paper, a commercial code of NX DAFUL 2.0 using an implicit integration method is introduced to calculate the response. In addition, the gap analysis is performed to investigate the fitness. Also, the optimum design is suggested through case studies.
황석철(Seok-Cheol Hwang),이동형(Dong-Hyong Lee),박영철(Young-Chul Park),이권희(Kwon-Hee Lee) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.2
This paper presents the study on the contact stress analysis of a pair of mating helical gears for turbo blower during rotation. Turbo blowers need high speed rotation of impeller in structure and high rate gear ratio. The use of helical gear indicated that noise was an important problem when the application involves high speeds and large power transmission. An example is presented to investigate the variation of contact stress on a pair of mating gears with contact positions. The variation of contact stress during rotation is compared with the contact stress at the lowest point of single tooth contact(LPSTC) and AGMA Equation for contact stress. In this study, the gear design considering the contact stress on a pair of mating gear is more severe than that of AGMA standard.
황석철(Seok Cheol Hwang),김종규(Jong Kyu Kim),서선민(Sun Min Seo),한승호(Seung Ho Han),이권희(Kwon Hee Lee) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.9
볼 조인트는 두 요소 사이에서 회전 및 이동이 원활하도록 돕는 역할을 하는 기계요소이다. 본 연구의 대상인 볼 조인트는 중대형 승용차량용 볼 조인트로서 너클과 컨트롤 암의 운동을 돕는다. 본 연구에서는 볼 조인트의 공정 및 시험에 관한 해석 방법을 제안하고자 한다. 볼 조인트의 제작공정은 플러깅 공정과 스피닝 공정으로 나눌 수 있다. 볼 조인트의 제작공정 및 성능시험을 암시적 수치 적분법을 적용한 상용 동역학 프로그램인 NX DAFUL 2.0 을 사용하여 해석하였다. 또한 설계요구조건을 정의하기 위하여 볼 스터드에 작용하는 응력의 평균 및 분산을 반응치로 설정하였다. 그리고 완성된 볼조인트의 유격량을 시험하는 유격시험해석을 통해 최적의 설계를 제안하였다. Ball joint is a rotating and swiveling element that is typically the interface between two parts. In an automobile, the ball joint is the component that connects the control arms to the steering knuckles by playing a role of bearing. The ball joint can also be installed in linkage systems for motion control applications. This paper describes the simulation strategy for a ball joint analysis, considering manufacturing process. Its manufacturing process can be divided into plugging and spinning. Then, the interested response is selected as the stress distribution generated between its ball and bearing. In this paper, a commercial code of NX DAFUL 2.0 using an implicit integration method is introduced to calculate the response. In addition, the gap analysis is performed to investigate the fitness. Also, the optimum design is suggested through case studies.
황석철(Seok-Cheol Hwang),이권희(Kwon-Hee Lee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
This paper Presents the study on the contact stress analysis of a pair mating helical gears during rotation. Contact stress analysis is performed between two helical gear teeth at different contact positions during rotation. An example is presented to investigate the variation of contact stress on a pair of mating gears with contact positions. The variation of contact stress during rotation is compared with the contact stress at lowest point of single tooth contact(LPSTC) and AGMA equation for contact stress. the results show that contact stress varies along the contact position and gets maximum values in the beginning and end of the contact. In this study, the gear design considering the contact stress on a pair of mating gears is more severe than that of AGMA standard.
고 Mn 강 소재를 적용한 IMO B Type LNG 탱크 설계
조성겸(Sung-Kyum Cho),황석철(Seok-Cheol Hwang),김일동(Il-Dong Kim),정희균(Hui-Gyun Jeong) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.2
The IMO B type 2,000m3 LNG fuel tank was designed to evaluate safety of wind turbine installation vessel(WTIV) with High Mn steel using SESAM S/W. The yield stress of all member was meet the standard as 255MPa. The designed tank was safety through yield analysis.
이슬(Seul Lee),이동형(Dong-Hyoung Lee),황석철(Seok-Cheol Hwang),이권희(Kwon-Hee Lee) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.2
This study performs the bending and contact stress analyses for a pair of mating gears during rotation. The interested gears are used for a railway reducer. In general, the railway reducer needs high speed rotation, which leads to a large gear ratio. Thus, it is not easy to apply finite element method to investigate the strength performance, since the size of a gear is much larger than that of a pinion. In this study, the bending and contact stresses determined from FEM are compared with the values determined from the ISO code.