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황광하(Hwang Kwang-Ha),박준택(Park June-Teak),이종수(Lee Joong-Su),박용걸(Park Yong-Gul),정우진(Jung Woo-Jin) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
In reference to conventional line speed-up and improvement railway, accurate assembly of turnout affects traveling quality of turnout area and running safety. Because of heavy weight and a large volume of the long sleepers and car limit, transport and construction of the P.C(prestress concrete) sleeper turnout is the most difficult process. the prerequisite for trouble-free transport of the factory pre-assembled major turnout components is achieved through division of long sleepers. So, in this paper we investigate structural safety of segmented sleeper which is adopted for the first time to improve performance of turnout and, new construction method.
황광하(Kwang-Ha Hwang),박광련(Kwang-Ryoun Park),나호필(Ho-Pil Na),윤병현(Byung-Hyun Yun) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5
무도유 롤러상판(Lubrication free baseplate with roller)은 분기기의 텅레일 전환시 상판과의 마찰력을 낮춰 전환력을 감소시키고 기본레일과의 고른 밀착성을 유지시키는 중요한 역할을 한다. 무도유 롤러상판이 개발되기 전 2000년대 중반까지 국내 대부분의 분기기는 상판과 텅레일의 마찰력을 줄이기 위해 도유를 하였고 이는 도상의 오염을 불러 일으켰으며, 현재까지도 상당수의 분기기들이 도유 상판을 사용하고 있어 환경오염 방지를 위해 개선이 시급한 실정이다. 본 연구에서는 국내외 무도유 롤러상판을 조사 분석하고 이를 획기적으로 개량하여 고속분기기를 포함한 국내 모든 분기기에 적용 가능한 무도유 롤러상판을 설계 및 제작하고 현장 적용하였다. Lubrication free baseplate with roller is indispensable part in a turnout particularly to reduce switching forces by decreasing friction force. Furthermore lubrication free baseplate with roller takes important role that the switch rail adheres to the stock rail clearly. Before Lubrication free baseplate with roller has designed, the most of turnouts use lubrication plates to decrease friction force, and it according to many of turnouts installed in domestic market using the lubrication plates even now, the countermeasures shall be This study report contains the analysis of roller plates both in domestic and overseas market, and suggest the epochimprovement of all kinds of turnouts in domestic market including high speed railroad turnout.
Fast clip을 적용한 콘크리트궤도용 노스가동 분기기 개발
황광하(Kwang-Ha Hwang),류기대(Ki-Tae Ryou),박춘복(Chun-Bok Park),박광련(Kwang-Ryoun Park),윤병현(Byung-Hyun Yun) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Turnout is a mechanical installation enabling railway trains to be guided from one track to another at a railway junction. A movable nose crossing frog is a device used at a railway turnout to eliminate the gap at the common crossing (High manganese block assembly crossing)which can cause impact damage noise and vibration. Our government has a plan speed up of conventional line to 250km/h semi-high speed. We had already developed flexible turnout with fixed crossing(High manganese) and SFC fastening system can cover in the semi-high speed line In this study is about development of the movable nose crossing turnout available Semi-high speed line on concrete track. This paper describes about geometry attack angle bending stress at the nose switching force safety of continuous welded long rails. This movable nose crossing turnout is expected greatly increases passing speed of turnout in national railway
Fast clip을 적용한 콘크리트궤도용 분기기 개발 (Development of turnout on concrete track using Fast clip)
황광하(Kwang-Ha Hwang),류기대(Ki-Tae Ryou),박춘복(Chun-Bok Park),박광련(Kwang-Ryoun Park),윤병현(Byung-Hyun Yun) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
Turnout is a mechanical installation enabling railway trains to be guided from one track to another at a railway junction. there are classified variously according to rail type, sleeper type, fastening system, track type. Construction of concrete track are on the increase recently to secure the safety of track structure as well as to reduce the maintenance cost. SFC fastening system used the plain track a lot and for those reasons, The fast clip turnout demand growing to improving efficiency of the maintenance cost by unification of fastening clip on whole line. in this study is about development of the fastening system for new turnout using fast clip. this fastening system assembled elasticity pad underneath a base plate. its can change stiffness how to adjust contact surface area of elasticity pad Developed fastening system have passed test according to rule of KRS-TR0014-09R (rail fastening system) and Performance Certification by KR
고속분기기 노스가동크로싱의 성능 및 유지보수 효율화를 위한 개량 방안에 관한 연구
윤병현(Byung-Hyun Yoon),황광하(Kwang-Ha Hwang),나호필(Ho-Pil Na),박광련(Kwang-Ryun Park),김만철(Man-Cheol Kim) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10
고속철도에서 차량의 방향을 전환시키는 고속분기기는 궤도용품 중에서 가장 중요한 핵심 기술로 분류된다. 고속분기기는 F18.5번 이상이 해당되며 국내에는 F18.5, F26, F46이 주로 사용되고 있다. 수량은 고속1단계(서울~대구)에 91틀, 고속2단계(대구~부산) 37틀, 호남고속(오송~광주) 48틀이 사용되어 총 176여틀이 현장에 적용되어 있다. 2004년 개통한 고속1단계 자갈도상용의 경우 사용기간이 10여년이 경과함에따라 부품별 교체 주기가 도래하고 있고 이에따른 유지보수력이 증가하고 있는 실정이다. 노스가동크로싱은 약 90여가지의 부품으로 조합된 가장 복잡한 구조로써 이의 유지보수에는 많은 시간과 전문기술 인력이 필요한 실정이다. 이에 성능을 향상시키면서 유지보수가 간편한 노스가동 크로싱 구조의 개발에 관한 연구를 수행하였다. A study on the performance improvement of the high speed turnout’s movable nose crossing and maintenance efficiency. the high speed turnout that converts the direction of the rolling stock is classified as the most important core technology out of all railway products. F18.5 and above are applied to the high speed turnout, and F26 and F46 are mainly used domestically. For quantity, 100 sets are applied to high speed line phase 1(Seoul~Daegu), 45 sets are each applied to phase 2(Daegu~Busan) and Ho-nam high speed line (OSong~GwangJu), which means that a total of approximately 190 sets are being applied on site. In case of the ballast track of high speed line phase 1 which opened in 2004, the exchange period for each component has arrived as its use of term has passed 10 years and accordingly, the maintenance for it is on the increase. the movable nose crossing has a very complex structure as it is combined with approximately 90 components, so a lot of time and manpower would be required. Therefore, we performed a study on the improvement of the movable nose crossing structure for simple maintenance by enhancing its performance.
고탄성 “Q클립형 레일체결장치”의 현장적용 사례와 효과 분석
윤병현(Byung-Hyun Yun),황광하(Kwang-Ha Hwang),최흥수(Heung-Su Choi),김만철(Man-cheol Kim),이광모(Kwang-MO Lee),김영기(Young-Ki Kim) 한국철도학회 2017 한국철도학회 학술발표대회논문집 Vol.2017 No.05
최근 화학공업 기술의 발전으로 우수한 내구성을 지닌 탄성패드 제작이 가능해짐에 따라 철도에도 탄성패드를 적용하는 사례가 지속적으로 증가하고 있는 추세이다. 국제적으로는 자갈도상의 침목 하부에 탄성패드를 부착한 USP 침목(Under Sleeper Pad)을 적용하거나, 하드한 레일패드를 소프트한 레일패드로 교체하여 궤도를 고탄성화 함으로써, 유지보수 인력과 비용을 절감시키는 다양한 실용화 기술이 현장에 적용되고 있다. 본 논문은 “레일패드의 탄성이 200kN/mm 이상인 하드한 레일 패드와 e 클립”을 “60kN/mm 의 소프트 한 레일패드와 Q 클립”으로 교체하였을 때 교체 전, 후 궤도에 나타나는 역학적 거동을 현장에서 동시에 정밀 측정하고 그 결과를 비교, 분석하였다. 고탄성화시 레일/휠간 접촉거동의 탄성역내 거동을 통해 레일표면 결함이 크게 감소하는 효과를 곡선부 부설을 통하여 확인하였다. Recently, there is an inclining trend of using elastic pad in railroads as the technological advancement in the chemical engineering allows us to produce elastic pads with excellent durability. There is an international trend to adapt under sleeper pads (USP) at the bottom of the railroad sleepers used at the ballast. Also, there is a trend to replace stiff rail pads with more softer rail pads. This trend of using new technologies at the field allows the track to be highly elastic so that there is a lesser need to maintain the track. The following study conducted the comparative analysis of dynamic movements when stiff rail pad with the elasticity of 200kN/mm over is replaced to soft rail pad with the elasticity of 60kN/mm. Analysis is based on track measurements when there is a change in rail pads. It is expected that when the there is an increase in the elasticity, there would be decrease in the defect at the rail surface. This is because the elastic movement caused from the rail and wheel contact movement.
김만철(Man-Cheol Kim),황성호(Sung-Ho Hwang),황광하(Kwang-Ha Hwang),현상학(Sang-Hak Hyun) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In this paper a flexible track modeling of turnout was developed and dynamic characteristics of turnout rails were analyzed when a vehicle passed through the turnout. The flexible track modeling is effective to the stiffness and durability design of turnout because it can capture the deformation and dynamic stress due to the collision of between wheels and rails when the vehicle move to the tongue rail. Also a more accurate running safety can be obtained by considering the interaction between wheel and rail deformation. Solid finite elements were used for variable cross-sections of rails and the variation of rubber stiffness was modeled. The proposed flexible track modeling in this paper was verified to be valid by comparison with the experiment of the turnout system.