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KTX 차량의 주행안정성 평가를 위한 노상과 PSC 교량 상의 윤하중분포 동적해석 연구
이동준(Dong-Jun Lee),오순택(Soon-Taek Oh),심영우(Young-Woo Sim),윤준관(Jun-Kwan Yun),김한수(Han-Su Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
A comprehensive analysis of wheel force spectrum is conducted to provide the KTX safety evaluation with structural behaviour of Pre-Stressed Concrete (PSC) box bridge due to various high speeds. The wheel spectrum for KTX locomotive running over road and PSC bridge tracks is compared using irregular track responses with numerical models of 170m approach road track and 40m span length of PSC box bridge The high-speed railway locomotive is used as 38-degree of freedom system. Three displacements (vertical lateral and longitudinal) and three rotational components (pitching rolling and yawing) for one car-body and two bogies are considered in the 38-degree of freedom model. Three dimensional frame element of finite element method (FEM) is used to model of the simply supported PSC box bridge. The irregulation of rail-way is derived using the experiential spectrum density function under assumption of twelve level tracks conditions based on the normal probability procedure. The dynamic analyses by Runge-Kutta method which are able to analyze the high frequency wheel force spectrum. A dynamic behaviour of KTX due to high speeds until 450km/h developing speed with relative time is analysed and compared the characteristics running over the road and PSC box bridge tracks. Finally the KTX integrated evaluation method of safety between high speed train and bridge is presented.
오순택(Soon-Taek Oh),이동준(Dong-Jun Lee),심영우(Young-Woo Sim),윤준관(Jun-Kwan Yun),김한수(Han-su kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
A dynamic analysis procedure is developed to provide a comprehensive estimation of the dynamic response spectrum for locomotive’s wheels running over a Pre-Stressed Concrete (PSC) box girder bridge on the Korea high speed railway. The wheel force spectrum with the bridge behavior are analyzed as the dynamic procedure for various running speeds (50~450㎞/h). The high-speed railway locomotive (KTX) is used as 38-degree of freedom system. Three displacements(vertical, lateral, and longitudinal) and three rotational components (pitching, rolling, and yawing). For one car-body and two bogies as well as five movements except pitching rotation components for four wheel axes forces are considered in the 38-degree of freedom model. Three dimensional frame element is used to model of the PSC box girder bridges, simply supported span length of 40m. The irregulation of rail-way is derived using the exponential spectrum density function under assumption of twelve level tracks condtions based on the normal probability procedure. The dynamic responses of bridge passing through the railway locomotive with high-speed analyzed by Newmark-β method and Runge-Kutta method are compared and contrasted considering the developed models of bridge, track and locomotive comprehensively. The dynamic analyses of wheel forces by Runge-Kutta method which are able to analyze the forces with high frequency running on the bridge and ground rail-way are conducted. Additionally, wheel forces spectrum and three rotational components of vehicle body for three typical running speeds is also presented.