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다축 Random Dynamic 하중을 받는 대차 저널박스의 피로수명평가
박상구(Park Sanggoo),김승섭(Kim Seungseob),한성욱(Han Sungwook),박근수(Park Geunsu),우관제(Woo Kwanje) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
This paper presents the evaluation of fatigue life for a journal box attached to rolling stock bogie under random dynamic loading condition. Because a journal box was under random dynamic loading conditions, the fatigue life assessment due to these loads requires the anlysis considering the multiaxial effect of random dynamic loading. To do this work, the finite element analysis has been conducted to calculate random dynamic response using multiaxial acceleration data. Then, the fatigue life assessment of component has been conducted using vibration fatigue analysis applying the power spectral densities of the responses obtained through the FEA. The results of fatigue life assessment were compared to the damage from the strain measurement. This study shows that can be evaluated the fatigue life assessment considering real service condition about a component attached to rolling stock bogie.
박경창(Kyoungchang Park),하홍기(Hongki Ha),이장욱(Jahngwook Lee),박근수(Geunsu Park),우관제(Kwanje Woo) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Obstacle deflector is a device to protect the train from obstacles laid on the track which is installed at the extreme end of the underframe of the car. This is the device related to the safety during crash event and its strength and energy absorbing requirements are recommended in various standards such as Korean Railway Safety Act, EN15227 and GM/RT2100. Although there are some differences among the standards, the basic concepts are similar. The deflector should endure the impact force without permanent deformation, and if the forces over the strength limit are applied, deflector has to absorb energy by push back mechanism maintaining proper reaction force. Therefore the evaluation of the deflector needs to be verified by the large deformation non-linear analysis as well as the linear analysis. This paper describes the FEA process and results of a deflector which is designed according to GM/RT2100 and EN15227 standards.
철도차량의 Crashworthiness 적용에 관한 실험 및 해석적 연구
이정수(Jungsu Lee),박경환(Kyounghuan Park),이장욱(Janguk Lee),박근수(Geunsu Park),우관제(Kwanje Woo) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
The CEM (Crash Energy Managament) concept is getting important in rail vehicle design to minimize injury on passengers and drivers on crash event. In this paper, the accuracy of the FEA analysis result was verified through the crush test on the front part of a non-CEM based carbody. Using the verified FEA analysis method, the energy absorbing capability of the CEM based carbody was estimated.
철도차량의 에너지 흡수 부재에 관한 실험 및 해석적 연구
이정수(JungSu Lee),김승섭(SeungSub Kim),이장욱(JahngWook Lee),박근수(GeunSu Park),우관제(Kwanje Woo) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The crashworthiness concept is getting important in rolling stock design to minimize injury on passengers and drivers in the event of crash. In this paper, the characteristics of dynamic collapse of energy absorption component that is used on rolling stock are analyzed for studying the importance of crashworthiness. Also, finite element analysis and experimental method are used for analyzing dynamic characteristics of energy absorbing component. First, the result of finite element analysis is compared with the measured absorbing energy of absorbing component through crash test for rolling stock. Through this, the energy absorbing capability of the component was verified.
철도차량 안전기준에 의한 KTX 산천 차량의 충돌안전성능 평가
조현직(Hyunjik Cho),구정서(Jeongseo Koo),이장욱(Jangwook Lee),박근수(Geunsu Park),우관제(Kwanje Woo) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, the crashworthiness of the KTX Sancheon was evaluated under the domestic safety regulation for high speed rollingstock. There are two serious collision scenarios to evaluate crashworthy performance. One is a train-to-train collision at 36 ㎞/h, and the other is a large obstacle-to-train at 110 ㎞/h. The KTX Sancheon turned to satisfy the performance requirements of the domestic safety regulation. That is, the deceleration caused by two collision scenarios remained under the allowable limits of the maximum 7.5g and average 5g. There did not also occurred a remarkable deformation in the survival spaces such as deriver"s and passenger"s rooms.