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우관제(Kwan-Je Woo),정상영(Sang-Young Jeong),김용원(Yong-Won Kim) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
차량이 노후화 됨에 따라 차량 안전성에 관련된 요소들의 특성이 변화하는 경향이 있다. 특히 타고오름탈선에 관련된 1차 스프링, 2차 스프링의 강성은 차량 노후화에 따라 강성이 커져 탈선의 위험성이 증가하게 된다. 또한 도시철도차량 안전기준에 관한 규칙발효 이전에 제작된 전동차는 윤중비 관리가 이루어지지 않아 수 십 %의 윤중비가 측정을 통해 확인되었다. 본 논문에서는 차량의 노후화에 따른 현수장치 특성 변경 및 도시철도차량 안전기준에 관한 규칙 발효 이전에 설계/제작된 차량의 실제 윤중비로 인한 타고오름탈선의 위험성에 대해 연구하였다 As the operation time of the train increases, the characteristics of the parts which have effect on the safety of the trains change. Especially, the stiffness of the primary and secondary springs has a tendency to increase with the aging so the possibility of the wheel climbing derailment increases. And the trains which designed and built before the domestic regulation which specifies the limit values of the wheel load ratio became effective, the measured wheel load ratio are as high as 20%~30%. In this paper the possibility of the wheel climbing derailment was studied with the changes of the characteristics of the suspension and wheel off-load ratio of the degraded trains.
우관제(Kwan-Je Woo),이승원(Seung-Won Lee),임인택(In-Taek Lim),김인재(In-Jae Kim),정상영(Sang-Young Jeong),김근수(Geun-Su, Kim) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
탈선사고 발생 시 탈선의 원인을 밝히기 위해 사고현장에서 궤도의 틀림량을 측정하게 된다. 궤도의 틀림량은 원칙적으로 궤도검측차를 이용하여 측정하여야 하나 사고현장의 특성상 궤도검측차를 투입할 수 없는 상황이 발생하고 이 경우 선형검측기 등기동성이 좋은 장비를 사용하여 측정을 하게 된다. 그러나 선형검측기 등의 측정장비는 중량이 수십 kg에 지나지 않아 실제 차량이 궤도에 작용하는 하중 등의 영향을 반영하지 못하는 단점이 있다. 본 논문에서는 궤도검측차 등을 이용한 동적 측정과 선형검측기등을 이용한 정적 측정결과를 비교하고, 선로의 보수기준에 이를 반영하는 방안에 대해 연구하였다. To find the causes of the derailment, measurement of track irregularity is necessary. Track measurement should be performed by using track measurement vehicles, however, deploying those vehicles to the sites where the accident has occurred is almost impossible. Trolley type measurement equipment is used instead in these cases. But the weight of the trolley type equipment is less than one hundred kilograms so the effect of the wheel load from the actual railway vehicles to the track cannot be reflected. In this paper the test results from the different track measurement equipment are compared and proposed to reflect the results to the track maintenance criteria.
양희주(Hee-Joo Yang),우관제(Kwan-Je Woo),손병구(Byoung-Gu Son),성재호(Jae-Ho Seong) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
THE VIBRATION MODE OF RAILWAY VEHICLE IS DIFFICULT TO FIND OUT THE CHARACTERISTICS OF MOTION DURING THE OPERATION ON THE TRACK BECAUSE THESE HAPPEN TO INDEPENDENCE OR DUPLICATION MOTION CAUSED BY VEHICLE WHEEL/RAIL INTERACTION TRACK IRREGULARITY AND FAILURE OF THE SUSPENSION & POWER TRANSMISSION DEVICE ETC. IT IS NAMED AN ABNORMAL VIBRATION THAT THE VIBRATION WHICH WAS PASSED THE PRIMARY AND SECONDARY SUSPENSION IS AFFECTED TO THE PASSENGER OR DRIVER WITHOUT DAMPING. THIS PAPER DESCRIBES AN EXPERIENCE EVALUATION TO FIND OUT THE CAUSE OF AN ABNORMAL VIBRATION WHICH WAS HAPPEN AT THE CAB OF POWER CAR IN KTX-SANCHEON TRAINSET WHEN ON RUNNING AT HIGH SPEED ZONE.
Ramp장치를 이용한 철도차량 거동모드 주파수에 관한 연구
양희주(Yang Hee-Joo),우관제(Woo Kwan-Je),성재호(Seong Jae-Ho) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
The railway vehicle is a multi-body system running on the track which consists of carbody, bogie and wheelset, each of components is connected with rigid mass, spring and damper. each of components has translation motions of longitudinal (X axis), lateral(Y axis) and vertical(Z axis) direction, and rotation motions of X, Y, Z axis which are named Rolling, Pitching and Yawing. The vibration mode of railway vehicle is difficult to find the characteristics of motion during the operation on the track because these happen to independence or duplication motion caused by vehicle, wheel/rail and track irregularity etc. This paper presents the result of ramp test to show the bounce, roll, pitch and yaw mode frequency of the railway vehicle.
박찬영,양홍준,이경훈,우관제,구만회,주재현,Park, Chan-Young,Yang, Hong-Jun,Lee, Kyoung-Hoon,Woo, Kwan-Je,Koo, Man-Hoi,Joo, Jae-Hyun 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.6
In this paper, the characteristics of shock behavior of multi-layered panels under impact were studied. The panels consist of four different lightweight materials including al, al-foam, rubber and FRP in order to enhance their shock energy absorption. A commercial code, Ls-dyna was used to build the numerical model and study shock behavior based on the analysis of shock response spectrum and peak response acceleration. The reliability of the numerical model was estimated by its comparison with the experimental results acquired under the same impact conditions.
양희주(Yang Hee-Joo),우관제(Woo Kwan-Je),이강운(Lee Kang-Wun),성재호(Seong Jae-Ho) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The ride comfort means the level of comfort for passenger on the train from vibration caused by external force such as track irregularity, train speed. the manner in which the passenger experiences ride comfort differs depending on the frequency and amplitude of the vibrations. the airspring is one of the suspension parts of railway vehicle and play an important rule to improve the ride comfort. To get soft vertical stiffness of the air spring, every air spring has the auxiliary air reservoir. the orifice is fitted in the air feed connection between the air spring and the auxiliary air reservoir, which provides damping control of the vertical oscillation of car-body. This paper presents the result of wedge test to show the damping performance of vibration of the railway vehicle by the difference of orifice diameter.
시험적인 통계적 에너지 기법(ESEA)을 적용한 진동 전달 특성 연구
이화수(Lee Hwa-Soo),우관제(Woo Kwan-Je),김종년(Kim Jong-Nyeun),이태욱(Lee Tae-Wook) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
Vibrational characteristics of coupled beam & plate system are considered on simple system, which consists of plates(2-subsystem) and beams(4-subsystem), using experimental statistical energy analysis(ESEA). First, damping and coupling loss factors of the system are determined by power injection method (PIM). Then, energy distribution of all the subsystem is estimated from the power balance equation. Finally, these quantities are compared with measured energy. The correlation of measured and estimated results for the sample problem is reasonably good.
HILS를 활용한 전투차량의 반능동 현수장치 적용에 관한 연구
김지웅,김문준,이은준,이경훈,우관제,Kim, Chi-Ung,Kim, Moon-June,Rhee, Eun-Jun,Lee, Kyoung-Hoon,Woo, Kwan-Je 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.6
There have been a lot of efforts on the improvement for the ride comfort and handling stability of the combat vehicles. Especially most of vehicles for military purpose have bad inertial condition and severe operating condition such as the rough road driving, and need a high mobility in the emergency status. It is necessary to apply the controlled suspension system in order to improve the vehicle mobile stability and ride comfort ability of crews. A feasibility study is performed on the application of the semi-active suspension system with a magneto-rheological controlled shock absorber for a $6{\times}6$ combat vehicle. First, the dynamic simulation model of the vehicle including the control model for the semi-active suspension system was executed. Based on this model, a hardware-in-the-loop simulation(HILS) system which has a semi-active suspension controller hardware was constructed. After full vehicle simulations were performed in virtual proving courses with this system, the semi-active suspension system was proven to give better ride comfort and handling stability in comparison with the conventional passive suspension system.