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장국진(Kook-Jin Jang),김철수(Chul-Su Kim),장천수(Cheon-Soo Chang),장승호(Seung-Ho Jang),김정규(Jung-Kyu Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
To reduce the cost and the time of transport in Eurasian railroad networks such as TKR, TCR and TSR owing to the problem of different track gauges (narrow/standard/broad gauge), it is important to develop the gauge - adjustable wheel set system to adapt easily to these gauges. Moreover, This system accomplish a conversion operation periodically from the gauge variable segment between Various gauge. gauge variable pressure coil spring from conversion process accomplish a central role repetitively for operation mechanism between flange and locking part. Therefore, to assure the safety of the gauge-adjustment wheelset system, it is necessary to fatigue life evaluate of coil spring in the system using stress analysis. it was performed to evaluate stability of running track with UIC 510-4code. Fatigue life of the gauge - adjustable compression spring with the variation of the fatigue strength was evaluated by fatigue life analysis simulator
김철수(Chul-Su Kim),안승호(Seung-Ho Ahn),정광우(Kwang-Woo Chung),장승호(Seung-Ho Jang),장국진(Kook-Jin Jang),김정규(Jung-Kyu Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
To reduce the cost and the time of transport in Eurasian railroad networks such as TKR(Trans-Korea Railway), TCR(Trans-China Railway) and TSR(Trans-Siberia Railway) owing to the problem of different track gauges (narrow/standard/broad gauge), it is important to develop the gauge - adjustable wheelset system to adapt easily to these gauges. Moreover, this system accomplishes periodically a conversion operation from the gauge variable segment between different gauge. Gauge adjustable compression coil spring during conversion process accomplishes repetitively a central role for operation mechanism between flange and locking part. Therefore, to assure the safety of the gauge-adjustment wheelset system, it is necessary to stress analysis of the optimized spring in the system. In this study, it was performed to optimal design of the spring for stress analysis by using the genetic algorithm and to stress analysis of the optimized spring by using FEA(finite element analysis)
궤간 가변 주행시 궤간 가변 잠금부품들에 대한 강도해석
김철수(Chul-Su Kim),안승호(Seung-Ho Ahn),정광우(Kwang ?Woo Chung),장승호(Seung-Ho Jang),장국진(Kook-Jin Jang),김정규(Jung-Kyu Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
To reduce the cost and time of transport in Eurasian railroad networks such as TKR, TCR and TSR owing to the problem of different track gauges(narrow/standard/broad gauge), it is important to develop the gauge - adjustable wheelset system to adapt easily to these gauges. Moreover, freight trains having the gauge - adjustable wheelset will be run various curved tracks in railroad networks. Therefore, to assure the safety of the gauge-adjustment wheelset system, it is necessary to evaluate integrity of locking parts in the system using stress analysis. In this study, it was performed to contact stress analysis of locking parts by using FEA(finite element analysis) simulator during the gauge changeover operation and freight trains' service in the curved track, respectively.
김철수(Kim Chul-Su),안승호(Ahn Seung-Ho),정광우(Chung Kwang-Woo),장승호(Jang Seung-Ho),장국진(Jang Kook-Jin),김정규(Kim Jung-Kyu) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
To reduce the cost and the time of transport in Eurasian railroad networks such as TKR(Trans-Korea Railway), TCR(Trans-China Railway) and TSR(Trans-Siberia Railway) owing to the problem of different track gauges (narrow/standard/broad gauge), it is important to develop the gauge - adjustable wheelset system to adapt easily to these gauges. Moreover, this system accomplishes periodically a conversion operation from the gauge variable segment between different gauge. Gauge adjustable compression coil spring during conversion process accomplishes repetitively a central role for operation mechanism between flange and locking part. Therefore, to assure the safety of the gauge-adjustment wheelset system, it is necessary to stress analysis of the optimized spring in the system. In this study, it was performed to optimal design of the spring for stress analysis by using the genetic algorithm.
김철수(Kim Chul-Su),안승호(Ahn Seung-Ho),정광우(Chung Kwang-Woo),장승호(Jang Seung-Ho),장국진(Jang Kook-Jin),김정규(Kim Jung-Kyu) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
To reduce the cost and the time of transport in Eurasian railroad networks such as TKR, TCR and TSR owing to the problem of different track gauges (narrow/standard/broad gauge), it is important to develop the gauge - adjustable wheelset system to adapt easily to these gauges. The gauge - adjustable wheelset system in the transcontinental railway have been proposed as a more effective way in comparison with other techniques for overcoming difference in track gauges. Assume that the freight train with gauge adjustable wheelset system is running from domestic train network to TCR, TSR in Eurasian continent, it is necessary to estimate the safety of this system. This study is evaluated at examination of safety for freight train with gauge adjustable wheelset system by simulated durability analysis. Moreover, the predicted fatigue life at running track using the durability simulator was verified by the durability test according to UIC standard.
이성문,김현철,석 준,박용일,장국진,박관규,손철호,박성배,이태희 啓明大學校 醫科大學 1996 계명의대학술지 Vol.15 No.2
We performed 1,000 consecutive native kidney biopsies using the 14 gauge Franklin-modified Vim-Silverman needle in adults at Keimyung University Hospital between Dec. 1978 and Aug. 1994 to assess the knowledge regarding renal histology on patient management. The indications for renal biopsy were :nephrotic syndrome (61.1%), hematuria and proteinuria(17.1%), glomerulopathy associated with systemic diseases(11.2%), renal insufficiency(3.3%), acute glomerulonephritis(3.2%), acute renal failure(2.6%), uremia(1.0%) and rapidly progressive glomerulonephritis(0.5%). One core of renal was tissue obtained in 20.7% of the cases, 2 cores in 53.3% and above 3 cores in 26.0%. The tissue specimen was adequate for histological evaluation in 90.6% of the cases. The major glomerular diseases were minimal change nephrotic syndrome(27.8%), Ig A nephropa thy(17.3%), focal segmental glomerulosclerosis(10.6%), menbranous nephropathy(10.4%), lupus nephritis(8.1%), membranous proliferative glomerulonephritis(7.6%), chronic glomerulonephritis(3.5%) and crescentic glomerulopathy(1.5%). Complications occurred in 51.8% of the total biopsies performed, consisting of microscopic hematuria lasting for more than 12 hours(38.3%), gross hematuria(9.1%), pain and tenderness(5.8%) and perirenal hematoma(2.7%). Major complications occurred in 12 patients(1.2%) in whom active therapy was required. In 7 cases, active hemorrhage developed and transfusion was required. Surgical repair of laceration with persistent bleeding was required in two patients. Three patients developed arteriovenous arteriovenous fistula following renal biopsies, who were treated successfully with superselective embolization. We suggested that a percutaneous renal biopsy is necessary for optimal evaluation of the glomerular disease when it comes to patient management.