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ADAMS/Rail과 ADAMS/Durability를 이용한 철도차량의 동응력 해석
조연호(Cho Yon-Ho),이강운(Lee Kang-wun),박길배(Park Gil-bae),최중호(Choi Jung-Ho) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Rotem has chosen ADAMS/Rail as the next generation analysis tool, to improve the capability and accuracy of the analysis ability. The dynamic performances of the railway vehicle, which is designed and manufactured by Rotem, have been analyzed and simulated using ADAMS/Rail. In this paper, Dynamic stress of bogie frame on running track is analyzed and compared with the data of real vehicle test. It is performed using ADAMS/AutoFlex and ADAMS/Durability.
ADAMS/Rail의 철도차량 표준모델을 이용한 철도선로의 설계
조연호(Cho Yon-Ho),곽재호(Kwak Jaeho) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
At an early design stage of rail track, dynamic analyses using a standard vehicle model of ADAMS/Rail are employed. In the real field, it is very difficult to find an optimal solution on the designing of rail track considering future operating vehicles because the construction of rail track should be done in the advance of vehicle selection and operation. Using a standard vehicle model of ADAMS/Rail, however the better selection among designed rail tracks is possible by comparing the dynamic analysis.
조연호(Yon-Ho Cho),이원상(Won-Sang Lee),김상우(Sang-Woo Kim) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5
전기모터를 주 동력원으로 활용하고 있는 전기철도차량은 전기모터에서 발생된 구동 토크가 모터 측 감속장치 (MRU: Motor Reduction Unit)와 구동력 전달 축 (Tripod) 그리고, 휠 측 감속장치 (ARU: Axle Reduction Unit)을 거쳐 전달된다. 전기철도차량의 구동계는 내연기관을 주 동력원으로 하는 자동차 등과 같이 변속기와 클러치가 구동계에 존재하여 회전 토크의 진동성분을 감쇄시켜주는 별도의 장치가 없어서 구동계의 고유모드와 외부가진 주파수가 유사하여 공진이 발생된 경우에 진동이 감쇠되지 않고 시스템에 나쁜 영향을 미칠 수 있다. 이러한 시스템의 설계에 있어서 구동계의 진동모드를 분석하고 운행 조건과 외부 가진 조건을 분석하여 공진을 사전에 회피할 수 있도록 설계하는 것이 무엇보다 중요하다. 본 논문에서는 이러한 구동계의 진동 특성을 AMESim을 활용하여 분석하고 설계변수의 민감도해석을 수행함으로써 토크 진동저감 방안을 제시하였다. Traction torque which generated by motor of electric railway vehicle is transferred through motor reduction unit (MRU), tripod and axle reduction unit (ARU). Transport system like automobile which use main traction power with internal combustion engine has gearbox and clutch in driveline. But electric railway vehicle doesn’t have any damping mechanism that reduces the rotational torque vibration in the driveline. When resonance occurs with the natural frequency of driveline and external excite source, the vibration does not disappear and has a bad effect on the system. On the concept design stage of this system, vibration mode analysis of driveline and comparative study running condition with external disturbance are accomplished. The resonance avoidance is very import thing to the driveline system. In this paper rotation torque vibration reducing method is suggested based on the vibration analysis and sensitivity test using AMESim.
KTX-산천 살사장치 서포트 브래킷 설계변경을 통한 강도 개선
윤우혁(Yoon Woo-Hyuck),조연호(Cho Yon-Ho),정훈(Jung Hoon),양방섭(Yang Bang-Sub),이원상(Lee Won-Snag) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5
살사장치 서포트 브래킷은 KTX-산천 선두 동력대차의 액슬박스에 조립되는 부품으로 매우 가혹한 환경을 견디어야 하는 철도차량 부품 중 하나이다. 기존에 사용되었던 브래킷(용접구조 타입)은 운행 도중 용접부에서 크랙이 발생하여 설계 변경이 요구되었다. 가혹한 환경 및 제작상의 오류를 최소화 할 수 있도록 설계 단계에서부터의 재검토를 수행하였으며, 수차례의 시행착오를 거치며 최적설계안을 도출하였다. 설계 변경 과정에서 중량 최소화를 위하여 재질 변경을 고려하였으며, 형상 및 재질, 중량 등을 모두 고려한 최적 설계안을 완성하였다. 도출된 설계안은 해석적 검토를 통하여 강도 개선 효과를 확인하였으며, IEC 61373 의 "Category 3" 에 해당하는 진동 시험 조건을 만족함을 시험을 통해 입증하였다. 변경된 설계안을 적용하여 제작된 살사장치 서포트 브래킷은 현재 KTX-산천 차량 5개 편성에 조립되어 성능을 검증 중에 있다. Support Bracket for Sanding Device is one of the parts of trainsets endure the most harsh environment. The bracket (welded structure that was used in the existing type) cracked in the weld zone during operation and design changes were required. From the design stage of the review was performed to minimize the harsh environment and production errors, and derive the optimum design proposal, subject to a number of trial-and-error. Were considered a material change, design changes in order to minimize weight in the process, considering both the shape and material, the weight of the optimal design proposal was completed. The derived design was determined the effect of the strength improvement through the review, proved the vibration test ‘Category 3’ corresponding to the IEC 61373. Support Brackets manufactured with the derived design are monitoring ongoing verification after application for 5 trainsets of KTX-Sancheon.
이남진(Lee Nam-Jin),강광호(Kang Kwang-Ho),이원상(Lee Won-Sang),박길배(Park Kil-Bae),조연호(Cho Yon-Ho) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The wheelset of traditional railway vehicle consists of two wheels of both side, which are assembled with axle rigidly and has a tapered tread profile. The interaction between coupled tapered wheels of both side and a rail causes a centering geometrical effect. This effect could compensate for difference of running distance between inner and outer wheel on curve track and asymmetric operating condition caused by different wearing pattern and assembling tolerance, and it also affect a snake-motion of bogie, critical speed and additional lateral excitation. On designing the traditional truck, it is one of main issues to find out the optimal design between positive and negative effects of tapered and fixed wheel. Independently rotating wheels (IRWs) are assembled to allow each wheel to have different revolution, which are applied on LRV to lower the floor hight of car-body or on high speed vehicle to increase the critical speed on High speed Vehicle. But, in the view of dynamic performance they have different characteristics compared with traditional wheelset. On this study, two type of wheelset above will be equipped the same LRV with on dynamic simulation and the dynamic performance will be compared between traditional wheelset and IRWs to understand the characteristics of IRWs.