곡선부 통과 열차의 주행안전성 평가에 관한 연구

엄범규(Eom Beom-Gyu),김종오(Kim Jong-Oh),양경탁(Yang Kyoung-Tak),이희성(Lee Hi-Sung) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

For the running safety assessment of Saemaul train passing through curves, an analysis model for multibody system has been developed. By using this model and ADAMS/Rail, sensitivity analyses depending on the variation of parameters related to the derailment coefficients have been conducted. According to the increase of running speed, the derailment coefficient and unload ratio were increased. At high speed, the derailment coefficient and unload ratio of left wheel showed higher than right wheel. If the cant increased, the derailment coefficient and unload ratio increased. but decreased based on the balance cant value by the curvature and running speed.

다물체 동역학해석을 이용한 DMT 화차의 주행특성 연구

엄범규(Eom Beom-Gyu),현석(Hyun Seok),안천헌(An Cheon-heon),이희성(Lee Hi Sung) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

The present investigate is a base investigate required in development of DMT wagon train. And it deduced that follows by developing trail analysis model about Modalohr wagon train and examining traveling movement specific using analysis model developed. Vibration acceleration of all direction was increased with addition of travel speed and first suspension. But in case of right and left vibration acceleration, that could influenced by nonlinear specific of first suspension. Therefore checking about those is needed. Frequency of 2~3 ㎐ and 7~8 ㎐ generated in Right and left, up, down vibration of vehicle. And right and left vibration of bogie generated 25~35 Hz in low speed section and frequency of 40~50 ㎐ in high speed section, 25~35 ㎐ in low speed section, 10~15 or 40~50 ㎐ in high speed section.

소형탈선시뮬레이터상에서의 1/5 축소대차 주행안정성 해석

엄범규(Beom-Gyu Eom),김태건(Tae-Geon Kim),강부병(Bu-Byoung Kang),이희성(Hi Sung Lee) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5

철도차량의 동적 거동 및 안정성 등을 예측하고 물리적인 특성을 이해하기 위하여 철도선진국인 영국, 프랑스, 일본에서는 축소모델 제작 및 시험하는 방법과 컴퓨터 시뮬레이션을 통하여 해석적으로 접근하는 방법이 사용되고 있다. 실물 규모의 동특성 시험은 대규모의 시험설비 구축에 따른 많은 비용과 시간의 소요, 그리고 시험 환경 설정의 어려움 등의 문제점이 발생하게 된다. 이러한 단점들을 극복하고자 상사법칙을 적용한 축소대차 모델을 이용하여 동적 시험 및 컴퓨터 시뮬레이션을 통한 해석적 연구를 수행하고 있다. 본 연구에서는 소형탈선시뮬레이터를 이용한 1/5 축소대차의 주행안정성 시험에서 신뢰성이 검증된 해석모델을 이용하여 주행안정성에 미치는 매개변수(주행속도, 차체 하중)에 따른 1/5 축소대차의 주행안정성 해석을 수행하고, 그에 따른 동적특성을 검토하였다. To forecast the dynamics behavior, running stability, etc. of railway vehicle and understand the physical characteristics, the analytical method is used through test and manufacturing of scale model and numerical simulation in advanced countries (England, France, Japan). The test of dynamics characteristic of full scale happens problems that is heavy charges and time by constructing test plant of large scale, difficulty of test configuration, etc. To remedy full test's shortcomings. the analytical study through dynamic test and computer simulation using scaled bogie model that apply similarity laws is achieved. In this paper, we achieved the running stability analysis of 1/5 scale bogie that follow to parameters (running speed, carbody weight, etc.) of running stability using analysis model that the reliability is verified in running stability test of 1/5 scaled bogie using small-scaled derailment simulator and examined dynamic characteristic of 1/5 scale bogie.

소형탈선시뮬레이터상에서의 1/5 축소대차 주행안정성 해석

엄범규(Beom Gyu Eom),강부병(Bu Byoung Kang),이희성(Hi Sung Lee) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.4

철도차량의 동적 거동 및 안정성 등을 예측하고 물리적인 특성을 이해하기 위하여 철도선진국인 영국, 프랑스, 일본 등에서는 축소모델 제작 및 시험하는 방법과 컴퓨터 시뮬레이션을 통하여 해석적으로 접근하는 방법이 사용되고 있다. 실물 규모의 동특성 시험은 대규모의 시험설비 구축에 따른 많은 비용과 시간의 소요, 그리고 시험 환경 설정의 어려움 등의 문제점이 발생하게 된다. 이러한 단점들을 극복하고자 상사법칙을 적용한 축소대차 모델을 이용하여 동적 시험 및 컴퓨터 시뮬레이션을 통한 해석적 연구를 수행하고 있다. 본 연구에서는 소형탈선 시뮬레이터를 이용한 1/5 축소대차의 주행안정성 시험에서 신뢰성이 검증된 해석모델을 이용하여 주행안정성에 미치는 매개변수 (주행속도, 차체 하중)에 따른 1/5 축소대차의 주행안정성 해석을 수행하고, 그에 따른 동적특성을 검토하였다. To forecast the dynamics behavior, running stability, etc. of railway vehicle and understand the physical characteristics, the analytical method is used through test and manufacturing of scale model and numerical simulation in advanced countries (England, France, Japan). The test of dynamics characteristic of full scale happens problems that is heavy charges and time by constructing test plant of large scale, difficulty of test configuration, etc. To remedy full test’s shortcomings. The analytical study through dynamic test and computer simulation using scaled bogie model that apply similarity laws is achieved. in this paper, we achieved the running stability analysis of 1/5 scale bogie that follow to parameters (running speed, carbody weight, etc) of running stability using analysis model that the reliability is verified in running stability test of 1/5 scaled bogie using small-scaled derailment simulator and examined dynamic characteristic of 1/5 scale bogie.

소형탈선시뮬레이터상에서의 1/5 축소대차 주행안정성 해석

엄범규(Beom Gyu Eom),강부병(Bu Byoung Kang),이희성(Hi Sung Lee),송문석(Moon Shuk Song) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.11

철도차량의 동적 거동 및 안정성 등을 예측하고 물리적인 특성을 이해하기 위하여 철도선진국인 영국, 프랑스, 일본 등에서는 축소모델 제작 및 시험하는 방법과 컴퓨터 시뮬레이션을 통하여 해석적으로 접근하는 방법이 사용되고 있다. 실물 규모의 동특성 시험은 대규모의 시험설비 구축에 따른 많은 비용과 시간의 소요, 그리고 시험 환경 설정의 어려움 등의 문제점이 발생하게 된다. 이러한 단점들을 극복하고자 상사법칙을 적용한 축소대차 모델을 이용하여 동적 시험 및 컴퓨터 시뮬레이션을 통한 해석적 연구를 수행하고 있다. 본 연구에서는 소형탈선시뮬레이터를 이용한 1/5 축소대차의 주행안정성 시험에서 신뢰성이 검증된 해석모델을 이용하여 주행안정성에 미치는 매개변수 중 주행속도, 차체 하중의 2 가지 변수에 따른 1/5 축소대차의 주행안정성 해석을 수행하고, 그에 따른 동적특성을 검토하였다. To predict the dynamics behavior, running stability, etc. of a railway vehicle and to understand its physical characteristics, analytical methods are used for the testing and manufacturing of a scale model along with numerical simulations in developed countries (England, France, Japan, etc.). The test of the dynamics characteristics of full-scale models is problematic in that it is expensive and time-consuming because an entire large-scale test plant needs to be constructed, difficulties are involved in the test configuration, etc. To overcome these problems, an analytical study involving dynamics tests and computer simulations using a scaled bogie model that applies the laws of similarity was carried out. In this study, we performed stability analysis on a 1/5 small scaled bogie for parameters such as the running speed and carbody weight by using an analysis model. Furthermore, we verified the reliability by using a small-scaled derailment simulator and examined the dynamic characteristic of the 1/5 small scaled bogie.

고무차륜 경량전철 국산화 대차의 주행안전성 향상을 위한 동특성 해석

엄범규(Beom-Gyu Eom),한병연(Byeong-Yeon Han),안천헌(Cheon-Heon An),강부병(Bu-Byoung Kang),이희성(Hi Sung Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10

The Light Rail Transit (LRT) System which has medium transport capacity between subway and bus(5,000-25,000 persons per hour) is the most advanced transportation system. It has many benefits cheap construction operational costs through driverless and flexible route planning. Also the rubber tired AGT (K-AGT) of various LRT has a rubber wheels and side guide. The side guide type has an many advantages. but occur a vibration and friction noise through contact between guide rail and wheel. Most of point that decreased comport is vibration thorough the guide contact. In this paper It is purpose to improve the maximum running speed of rubber tired AGT localization bogie which is currently developed from 70km/h to 80km/h. To satisfy comport index of railway vehicle that is required in performance test. we examined coefficient of bogie suspension which is designed.

상사법칙을 적용한 KTX-산천의 1-5 축소대차 설계에 관한 연구

엄범규(Beom-Gyu Eom),한병연(Byeong-Yeon Han),강부병(Bu-Byoung Kang),이희성(Hi Sung Lee) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5

철도차량의 탈선은 발생시 대형사고로 이어질 수 있어서, 철도차량의 주행안전 확보 문제는 철도운영기관 및 시설기관의 주요 현안 사항이다. 철도차량에서 발생하는 다양한 물리적 현상은 실제 차량과 동일한 물리적 제원으로 시험이 이루어져야 되나, 현실적으로는 시험시간 및 시험비용 등의 물리적, 경제적 제약이 따르므로, 소형스케일의 시뮬레이터를 이용한 철도차량의 동역학적 거동을 체계적으로 모사하는 방안이 중요하다. 현재, 고속철도차량의 주행시 승객의 안전과 직결되는 고장으로 인하여 문제점이 빈번히 발생하고 있는 상황이다. 본 연구에서는 이전에 새마을호의 축소대차를 활용한 주행안정성 평가 기술개발에 관한 연구 경험을 토대로 상사법칙을 적용한 고속철도차량인 KTX-산천의 1/5 축소대차 설계에 관한 연구를 수행하여 소형탈선시뮬레이터상에서의 1/5 축소대차를 제작하였다. The dynamic stability of railway vehicle has been one of the important issues in railway safety. The dynamic simulator has been used in the study about the dynamic stability of railway vehicle and wheel/rail interface optimization. Especially, a small scale simulator has been widely used in the fundamental study in the laboratory instead of full scale roller rig which is not cost effective and inconvenient to achieve diverse design parameters. But the technique for the design of the small scale simulator about the dynamic characteristics of the wheel-rail system and the bogie system has not been well developed in Korea. Therefore, the research using the small-scaled derailment simulator and the 1/5 scaled bogie has been conducted. When the high speed train runs, the problem by breakdown that is connected directly in passenger's safety is frequently happening at present. In this paper, we carry out a study on 1/5 scaled bogie design of KTX-Sancheon using similarity laws on the basis of research experience about 1/5 scaled bogie of saemaul-ho and manufactured 1/5 scaled bogie on small scaled derailment simulator.

레일 캔트 변화에 따른 주행특성에 관한 연구 (A Study on the Running Characteristic by Rail cant variation)

엄범규(Beom-Gyu Eom),김영규(Young-Gyu Kim),이승일(Seung-Il Lee),이희성(Hi Sung Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5

The rail cant produces a wider bearing area between the wheel and the rail by moving the wheel?rail contact area away from the gauge towards the centre of the railhead, thus improving the wear pattern of the railhead and wheel treads. It is essential to keep the rail cant within the allowable range to ensure optimum track geometry. Neglecting the rail cant geometrical parameters in a track quality evaluation can cause safety of railway vehicle and serviceability problems. In this paper, we examined the effect of the rail cant in general geometry state of the railway track using VI-Rail and analyzed running safety when the railway vehicle passing through curves depending on change of the rail cant and running speed.

소형탈선시뮬레이터를 이용한 1/5 축소대차의 주행안정성 시험

엄범규(Beom-Gyu Eom),이세용(Se-Yong Lee),이영엽(Young-Yeob Lee),강부병(Bu-Byoung Kang),이희성(Hi Sung Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10

The dynamic stability of railway vehicle has been one of the important issues in railway safety. The dynamic simulator has been used in the study about the dynamic stability of railway vehicle and wheel/rail interface. Especially a small scale simulator has been widely used in the fundamental study in the laboratory instead of full scale roller rig which is not cost effective and inconvenient to achieve diverse design parameters. But the technique for the design of the small scale simulator for the fundamental study about the dynamic characteristics of the wheel-rail system and the bogie system has not been well developed in Korea. Therefore the research about the development of the small scale simulator and the bogie has been conducted. As this paper To predict the dynamic behavior of railway vehicle we studied running stability test of 1/5 scaled bogie that similarity laws is applied using small scale derailment simulator. For the operation of the small scale derailment simulator it is required to investigate the performance and characteristics of the system. This could be achieved by a comparative study between an analysis and an experiment. This paper presented the analytical model which could be used for verifying of the test results and understanding of the physical behavior of the dynamic system comprising the small scale bogie and the simulator.

곡선부 주행 차량의 마모특성에 관한 연구

엄범규(Eom Beom-Gyu),현석(Hyun Seok),양경탁(Yang Kyoung-Tak),이희성(Lee Hi-Sung) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

For the wear characteristics assessment of Saemaul train passing through curves, an analysis model for multi-car system has been developed. By using this model and ADAMS/Rail, sensitivity analyses have been conducted for the wear characteristics by changing the related parameters. According to the increase of running speed, the wear number, the sliding mean and friction coefficient were increased. At high speed, the wear number, the sliding mean and friction coefficient of left wheel showed higher than right wheel. If the cant increased, the wear number the sliding mean and friction coefficient increased. but decreased based on the balance cant value by the curvature and running speed.