http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유전 알고리즘을 이용한 일 방향 유동성 단조품의 예비성형체 설계 연구
염성호(SungHo Yeom),이종호(JeongHo Lee),우호길(HoKil Woo) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The main objective of this paper is to propose the optimal design method of forging process using genetic algorithm. Design optimization of forging process was doing about one stage and multi stage. The objective function is considered the filling of die. The chosen design variables are die geometry in multi stage and initial billet shape in one stage. We performed 2D FE analysis to simulated forging process. The optimized preform and initial billet shape was obtained by genetic algorithm and FE analysis.
전단스피닝에서 가공깊이와 리드각이 성형력에 미치는 영향
염성호(Sungho Yeom),남경오(Kyoungo Nam),박현진(Hyunjin Park),홍성인(Sungin Hong) 한국추진공학회 2007 한국추진공학회지 Vol.11 No.1
The shear spinning has been used to produce thin angled cone of parts, with reduced forming force and enhanced mechanical and surface quality for a good finished part, compared with other method formed parts. So shear spinning technique is used widely in industrial production. Especially shear spinning and flow forming techniques are used frequently in automotive, aerial, defense industry. In this paper, finite element method analysis of shear spinning for a cone shape workpiece is carried out to study effects of forming depth and lead angle on forming force. The axial and radial forces on several forming depth and lead angle conditions are obtained.
유체 유동을 고려한 유동부를 갖는 용접부 형상의 마찰용접 해석
염성호(Sungho Yeom),김범년(Bumnyun Kim),홍성인(Sungin Hong) 한국추진공학회 2007 한국추진공학회지 Vol.11 No.3
Friction welding is a welding method to use frictional heat of a couple of materials. In this paper object is that design the welding part shape with the flow gallery part which there is no effect in flow. Decided the welding part design parameter and doing the friction welding analysis used the rigid-plastic FEM program DEFORM-2D. To do friction welding analysis must input necessary flow stress data, friction coefficient by temperature change, upset pressure and Revolution per minute etc. According to analysis result, it decided the optimal shape of welding part with no effect in flow.
퍼지-다요소 결정기법에 의한 단조피스톤의 예비성형체 설계 연구
염성호(Sungho Yeom),남경오(Kyoungo Nam),홍성인(Sungin Hong) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper introduces the technique for preform design method of the forged piston using fuzzy - TOPSIS (Technique for Order Preference by Similarity to Ideal Solution). The design parameter of forged piston that was described by cardinal number changed to fuzzy number. FEM analysis was archived for the preform shape to describe with fuzzy number. The result values of FEM analysis, ductile fracture value, load, effective strain rate and effective stress, was decided to the multi factor of fuzzy-TOPSIS. The result values of FEM analysis were calculated by computational procedure of fuzzy TOPSIS. And the preform shape was decided by TOPSIS calculation result. The preform shape was changed by given the weight value to important factor. The weight value with designer's interest was calculated by the analytic hierarchy process. The Fuzzy-TOPSIS method was effective decision techniques in the decision method of preform design.
열간단조에서 유한요소법과 유전 알고리즘을 이용한 예비성형체의 최적형상 설계 연구
염성호(SungHo Yeom),이종호(JeongHo Lee),우호길(HoKil Woo) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.4
The main objective of this paper is to propose the optimal design method of forging process using genetic algorithm. Design optimization of forging process was doing about one stage and multi stage. The objective function is considered the filling of die. The chosen design variables are die geometry in multi stage and initial billet shape in one stage. We performed FE analysis to simulated forging process. The optimized preform and initial billet shape was obtained by genetic algorithm and FE analysis. To show the efficiency of GA method in forging problem are solved and compared with published results.
염성호(SungHo Yeom),남경오(KyoungO Nam),박현진(HyunJin Park),홍성인(SungIn Hong) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
In this study, the optimized initial hole shape for angled branch forming was proposed to obtain effective welding region. Design variables were determined by approximation analysis using volume constant condition. We performed 3D elastic-plastic FE analysis to simulated angled branch with various hole shapes was investigated. The optimized initial hole shape equation was obtained by using results for the numerical analysis.