• Title, Summary, Keyword: Steering bogie

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Verifying of steering performance of the steering bogie (조향대차의 곡선선로 주행시 조향성능 검토)

  • Kim, Jung-Ha;Yang, Hee-Joo;Ahn, Jae-Kwang
    • Proceedings of the KSR Conference
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    • pp.1069-1073
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    • 2011
  • When the train is running on the small curved line, there would be severe contact between the rail and wheels, which cause noise and vibration as well as abnormal wear on the rail and the wheels. In order to solve these problems, the steering bogie has been developed. To verify steering performance of the steering bogie, steering angles of two trains, one is the advanced EMU with the steering bogie, another is a conventional EMU with the conventional bogie, were measured while running on the small curve. this comparing test shows that the steering bogie has much higher steering performance than the conventional bogie on the same curved line. To verify more performance data of the steering bogie, further testing and monitoring will be done with the advanced EMU in the test track.

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Recent Development Of (Semi)-Active Steering Bogie Systems For Railway Vehicles (철도차량용 (반)능동 조향대차 시스템의 기술현황)

  • You, Won-Hee;Park, Joon-Hyuk;Hur, Hyun-Moo
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.510-518
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    • 2008
  • This paper presents recent development of (semi)-active steering bogies for railway vehicles and introduce the state-of-art of related technologies. Steering bogies have been studied in various researchers since they can offer high ride quality for passengers and reduce the maintenance costs of wheel and rail wear. Especially, they are considered to be a fundamental solution to dramatically reduce the squeal noise on tight curves. However, passive steering bogies such as self-steering bogies and forced steering bogies have shown their limits to cope with the various running conditions. Therefore, (Semi)-active steering bogies have been studied to overcome the drawbacks of the passive steering bogies. As a result, an active steering bogie, so called mechatronic bogie, is developed successfully in Europe and it has shown remarkable performance in test line.

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Development of the Scale Track to Test Bogie Steering Performance (대차 조향 특성 시험을 위한 축소 트랙 개발)

  • Hur, Hyun-Moo;Park, Jun-Hyuk;You, Won-Hee;Park, Tae-Won
    • Proceedings of the KSR Conference
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    • pp.301-305
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    • 2007
  • The performance of the railway bogie is classified into the stability and the steering performance. Testing for the bogie stability is conducted on the roller rig. But testing for the bogie steering performance on test facility is very difficult, so the testing for the vehicle curving performance is conducted on the real curve track. And it is desirable to test on the full scale test rig, but it caused many problems relating to test costs, test time. To overcome these problems, the small scale test rig is actively used in the field of bogie stability. Thus, in this paper, we have studied the scale track to test the bogie steering performance. For this, we designed the 1/5 scale test track equivalent to radius 200 curve and confirmed the validity of the testing for the bogie steering performance on the scale curve track through the testing using 1/5 scale bogie.

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Analysis on Steering Capability of a New Bogie with Independently Rotating Wheels

  • Chi, Maoru;Zeng, Jing;Guo, Wenhao;Zhang, Weihua;Jin, Xuesong
    • International Journal of Railway
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    • v.2 no.4
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    • pp.164-169
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    • 2009
  • A new scheme about a coupled bogie with Independently Rotating Wheels was put forward firstly. And then it is fund by theoretic analysis that the bogie takes on prominent radial capability on curved track and splendiferous restoring capability on tangent track. Lastly, a dynamic calculating model of the coupled bogie with independently rotating wheels has been established and a dynamic simulation analysis on steering capability of the bogie was made and the simulation results can inosculate foregoing theoretic analysis, which illuminates that the coupled bogie can solve drastically the difficulty about steering problem of independently rotating wheel.

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Vibration Fatigue for the Bogie frame of the Rubber Wheel AGT (고무차륜형 AGT 주행장치의 진동피로해석)

  • 유형선;윤성호;변상윤;편수범
    • Journal of the Korean Society for Railway
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    • v.3 no.3
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    • pp.117-124
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    • 2000
  • The rubber wheel-type AGT has two major kinds of bogie; one is the bogie type and the other steering one. Both are important vehicular structure to support the whole running vehicle and passenger loads. This paper deals with the static analysis for the two types of bogie frame subjected to combined external forces, as well as independent ones specified in UIC 515-4. Furthermore, the dynamic analysis is performed under vibrational loading conditions so as to compare dynamic characteristics, Numerical results by using commercial packages, I-DEAS and NASTRAN show that maximum stresses do not exceed the yield strength level of material used for both bogies. From an overall viewpoint of strength, the bogie type turns out to be superior to the steering type except for the case of a lateral loading. It is also observed that the steering type shows a characteristics of low frequency behavior during a course of searching for structurally weak areas to be stiffened. The vibrational fatigue analysis for each bogie frame depends on the loading time history conditions which is applied. Time History Central Database List in the NASTRAN package. Subsequent1y, the fatigue life of bogie type is longer than the steering type.

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A Study on the Curving Performance of a Scaled Bogie on a Scaled Curve Track (축소 곡선 트랙상에서의 축소 대차 곡선주행특성 연구)

  • Hur, Hyun-Moo;Park, Joon-Hyuk;You, Won-Hee;Park, Tae-Won
    • Journal of the Korean Society for Railway
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    • v.10 no.5
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    • pp.613-618
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    • 2007
  • The performance of the railway bogie is classified into the stability and the steering performance. Testing for the bogie stability is conducted on the roller rig, but testing for the bogie steering performance on test facility is very difficult, so the testing for the vehicle curving performance is conducted on the real curve track. Testing the railway bogie on the full scale test rig is desirable, but it caused many problems relating to test costs and test time. As a possible alternative to overcome these problems, a small scaled test rig is actively used in the field of bogie stability. Thus, in this paper, we have studied a scaled track to test the bogie steering performance. For this purpose, we designed the 1/5 scaled test track equivalent to radius 200 curve and confirmed the validity of the testing for the bogie steering performance on the sealed curve track through the testing using 1/5 scaled bogie.

Evaluation of Critical Speed for Active Steering Bogie Prototype (능동형 시제 조향대차의 임계속도 평가)

  • Hur, Hyun Moo;Park, Joon-Hyuk
    • Journal of the Korean Society for Precision Engineering
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    • v.34 no.3
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    • pp.205-210
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    • 2017
  • Critical speed analysis was conducted for a active steering bogie prototype, developed to improve the curving performance of railway vehicles. The critical speed for the design concept was about 169.2k m/h. To validate the analysis result, we performed a critical speed test for the prototype bogie using a roller-rig tester. The test results showed that the critical speed for the prototype bogie was about 165 km/h. From the analysis and test results, The critical speed for the prototype bogie was determined to be 165 km/h. Considering the maximum operating speed of the test vehicle is 100 km/h, the prototype bogie is considered stable.

Dynamic Stability of Automated Guideway Transit (AGT) Vehicles (AGT차량시스템의 동적 안정성)

  • 송창민;이우식
    • Proceedings of the KSR Conference
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    • pp.282-291
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    • 2000
  • In this paper, the dynamics of automated guideway transit vehicles with rubber tires are studied. Two different AGT models are considered: the bogie system and the steering system . It is found that the bogie system is stable at all possible operating speeds, whereas it is not true fur the steering system. To investigate the dynamic stability of steering systems, the critical speeds are investigated and the dynamics of the closed-loop steering control system are numerically simulated.

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Concept Design of an Active Steering Bogie for Urban Railway Vehicles (도시형 전동차용 능동조향대차의 개념설계)

  • Park, Joon-Hyuk;Hur, Hyun-Moo;Koh, Hyo-In;You, Won-Hee
    • Journal of the Korean Society for Railway
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    • v.10 no.6
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    • pp.709-716
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    • 2007
  • An active steering bogie has been theoretically proved to improve both stability and steering performance remarkably. However, It has not been commercialized yet even though many researchers have been trying to develop it because some technical difficulties still exist such as information acquisition fer active control, increasing mechanical components, high energy consumption, fail-safe problem and so on. To solve those problems, an advanced active steering mechanism is proposed in this paper. With this mechanism, required control force is small enough to use direct drives. Therefore, the number of additional mechanical components can be minimized since mechanical transducers like gears are not necessary. Fail-safe function can be also inserted easily. In this paper, concept design of the proposed active steering bogie is introduced and the possibility is verified through computer simulation using linear dynamic model.

The Structural and Fatigue Analysis for the Bogie Frame of the Rubber Wheel AGT (고무차륜형 AGT 주행장치의 구조 및 피로해석)

  • 유형선;권혁수;윤성호
    • Journal of the Korean Society for Railway
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    • v.2 no.2
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    • pp.31-38
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    • 1999
  • Two representative types of the AGT (Automated Guideway Transit) system, which are bogie and steering types, are available for the side-guided system. Each system primarily consists of the bogie frame, suspensions, wheelsets and axles, braking system and transmission system. Among these components, the bogie frame is one of the most significant components subjected to the whole vehicle and passenger loads. This paper describes structural analyses and associated fatigue analyses for each bogie frame depending on the various loading conditions on a basis of the railway vehicle code UIC 515-4. Subsequently, comparisons are made between those two types to estimate which type is more reliable in terms of strength and fatigue. It is observed that the bogie type is a little advantageous over the steering one from the strength analysis. However, the two types are found to be in a reliable range of fatigue even though a realistic fatigue load case is further carried out. In addition, an optimal size of thickness is suggested for designs of the bogie frame.

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