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현가부품 내구하중 추출을 위한 가상 내구 시험 기법 연구
손성효(Seong-Hyo Son),강대오(Dae-Oh Kang),허승진(Seung-Jin Heo),김동석(Dong-Seok Kim),강오성(Oh-Sung Kang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
To reduce vehicle development cycles it is necessary to perform numerical durability analysis in an early development phase. This paper presents an alternative method 'VTL : Virtual Testing Lab' to predict the required loads for fatigue analysis. In VTL using Multi-Body Simulation (MBS), the loads prediction process can be performed for an constrained or unconstrained vehicle under several different conditions. Various VTL methods and related technologies showing different results are introduced and evaluated in this paper.
현가부품 내구하중 추출을 위한 가상 내구 시험 기법 연구
손성효(Seong-Hyo Son),강대오(Dae-Oh Kang),허승진(Seung-Jin Heo),김동석(Dong-Seok Kim),강오성(Oh-Sung Kang) 한국자동차공학회 2005 한국자동차공학회 Symposium Vol.- No.-
To reduce vehicle development cycles it is necessary to perform numerical durability analysis in an early development phase. This paper presents an alternative method 'VTL : Virtual Testing Lab' to predict the required loads for fatigue analysis. In VTL using Multi-Body Simulation (MBS), the loads prediction process can be performed for an constrained or unconstrained vehicle under several different conditions. Various VTL methods and related technologies showing different results are introduced and evaluated in this paper.
분리형 개질기를 이용한 고효율 일체형 개질기 개발에 관한 연구
박상현,김철민,손성효,장세진,김재동,방완근,이상용,PARK, SANG-HYOUN,KIM, CHUL-MIN,SON, SUNG-HYO,JANG, SE-JIN,KIM, JAE-DONG,BANG, WAN-KEUN,LEE, SANG-YONG 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.1
A high efficiency integrated reforming system for improving the efficiency of the 5 kW PEMFC system used as the back up power of building was studied. The separated reforming system consisted of three parts - A steam reformer with two stage concentric circular shape, a heat exchanger type steam generator and a CO shift reactor. Temperature and steam carbon ratio (SCR) were control variables during operation. The operating conditions were optimized based on the thermal efficiency of the steam reformer as reformate gas composition changes at different temperature. In experiments, water was fully vaporized in the steam generator up to SCR 3.5 and the maximum thermal efficiency was achieved at the operating temperature around $700^{\circ}C$ in the steam reforming reactor. With the results of the separated reforming system research, we improved the shape of high efficiency integrated reformer. The performance evaluation of the integrated reformer was based on optimized operating conditions in SCR 3.5. As a result, the developed integrated reforming system maintained an efficiency of 76% and constant performance over 3,000 hours.
추성훈(Seong Hun Chu),손성효(Sung Hyo Son),류영일(Young Il Ryu),허승진(Seung Jin Heo),임홍재(Hong Jae Yim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Accuracy of fatigue analysis highly depends on several parameters such as fatigue properties of material. load data of each loading point, mean stress, and static analysis (sometimes modal analysis or transient analysis) results. etc. Most parameters extracted from test have normal or other distribution and are usually decided from mean values of those distribution. But fatigue test result can be different due to test situation like temperature, test jig setup, and manufacturing technique of specimen etc. Therefore to get more accurate fatigue analysis results it is often peformed to test special specimen for acquisition of fatigue properties. In this paper, the effects of these variables are examined to predict fatigue life. Also, advanced method such as multi-axial fatigue analysis is discussed. Analysis based on uniaxial and biaxial calculations are compared for the Knuckle component.