• 제목/요약/키워드: Bogie

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A Study Vibration Characteristic of Railway Freight Car's End Beam for Taebaek Line (태백선을 주행하는 화차 엔드빔의 진동특성에 관한 연구)

  • 함영삼;문경호;홍재성;이동형;서정원
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.378-383
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    • 2004
  • Bogie is the connection device between carbody and wheel. It is the core part that exert a important effect on the passenger safety and running safety. Bogie largely consist of bogie frame, suspension, brake, wheel set. Static and Dynamic load have acted on it complexly. So when the bogie is designed, finite element method, static load test, fatigue test running test should be considered. Some bogie frame of high speed railway freight car have the problem. It's end beam was cracked. The crack of the end beam have a bad effect on brake system. ROTEM co. made an improved end beam and applied one set to freight car. this report showed the vibration characteristic which was compared conventional bogie to improved bogie for running safety.

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A Study on the Fatigue Analysis of Bogie Frame under Multiaxial Loading (다축하중을 받는 대차프레임의 피로해석에 관한 연구)

  • 이상록;이학주;한승우;김경식
    • Proceedings of the KSR Conference
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    • 1998.05a
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    • pp.330-337
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    • 1998
  • Bogie is mainly consisted of the bogie frame, suspensions, wheels and axles, braking system, and transmission system. The complex shapes of the bogie frame and the multiaxial loading condition induced in real operation make it difficult to design the bogie frame against the fatigue. In this study, multiaxial fatigue criteria were reviewed. Stress analysis of the bogie frame has been performed for the various loading conditions according to the UIC Code 615-4. Magnitudes of the stress amplitude and mean stress were estimated based on the stress analysis results to simulate the operating loads encountered in service. Fatigue strength of the bogie frame was evaluated by using the constant life diagram of the material. 3-D surface model ling, finite element meshing, and finite element analysis were performed by Pro-Engineer, MSC/PATRAN, and MSC/NASTRAN, respectively.

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Evaluation of environmental impacts for the bogie of electric motor unit(EMU) using simplified life cycle assessment(S-LCA) (간략화된 전과정 평가를 이용한 전동차 대차의 환경영향 진단)

  • Kim Yong-Ki;Yoon Hee-Teak;Yang Yun-Hee;Lee Jae-Young
    • Journal of the Korean Society for Railway
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    • v.8 no.6 s.31
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    • pp.581-585
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    • 2005
  • In this study, the environmental impacts of a bogie in the electric motor unit(EMU) were evaluated quantitatively using simplified life cycle assessment(S_LCA). Target was the bogie and life cycle inventory(LCI) database for the bogie was established. The software used for simplified LCA was PASS. Environmental impacts with the parts of the bogie were dependent on their weight significantly. Among impact categories, abiotic resource depletion(ARD) and global warming(GW) were shown dominantly. Global warming was occurred mainly due to the emission of CO₂released from energy consumption and abiotic resource depletion was caused mostly by the consumption of iron ore for the manufacturing of steel. Therefore, the environmental impacts of the bogie could be reduced by the light-weighting of EMU and the improvement of energy efficiency.

A Study on Analysis of Load Test Result of Bogie Frame for New Electrical Multiple Unit (신형전동차 대차프레임 하중시험결과 분석 연구)

  • Kim Won-kyung;Yoon Sung-Cheol;Jun Chang-Sung
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.1056-1062
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    • 2005
  • This paper describes the results of structure analysis and load test of a bogie frame. The purpose of the test is to evaluate the safety and functionality of the bogie frame under maximum load. The bogie system consist of the bogie frame, suspensions, whee/sets, a brake system and a transmission system. Of these components, the bogie frame is the major component subjected to the vehicle and passenger loads. The evaluation method used the JIS E 4207 specifications throughout static load test. The test results have shown the bogie frame to be safe under design load conditions.

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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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A Study on The Load Test Method and Result For Bogie Frame of New LRT (신형 경전철차량 대차프레임 하중시험 방법 및 결과 고찰)

  • Kim, Weon-Kyong;Won, Si-Tae;Jeon, Chang-Seong
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.1679-1688
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    • 2008
  • Recently, the bogie frame weight of Light Rail Transit system has been reduced in order to save energy and materials. However, this light weighted vehicle structure is very important to verify the fatigue strength at the development stage. Bogie system consists of bogie frame, suspensions, wheel-sets, braking system and transmission system. Among these components, the bogie frame is most significant component subjected to the whole vehicle and passenger loads. In this study, the bogie frame for the New LRT power car is evaluated to the static and fatigue strength. And the evaluation method is used the LRT Performance Test Standards Specification throughout the FEM analysis and static load test. The static and fatigue test results for the LRT bogie frame of power car has been appeared very safety and stable for the design load conditions.

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A Study on Algorithm of Bogie Unit Braking System (차세대전동차 대차단위 제동시스템 알고리즘에 관한 연구)

  • Kim, Gil-Dong;Lee, Han-Min;Park, Sung-Hwan
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1916-1921
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    • 2008
  • In the braking process of rolling stocks, the equivalent braking force is applied to the all bogies. However, the load applied to the front and rear bogie are different in the actual commercial traveling. In the case, since the different slip situation is occurred in each bogie, it is essential to use the independent anti-slip control per bogie unit in order to reduce the loss of braking force. In this paper, the algorithm about bogie unit braking is proposed and verified.

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The Launch Operation Sequence through Remote Control of Bogie (보기 원격제어를 통한 발사 운용과정)

  • Lee, Chang-Bae;Seo, Jin-Ho;Lee, Soo-Jin;Chung, Eui-Seung
    • Aerospace Engineering and Technology
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    • v.7 no.2
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    • pp.144-150
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    • 2008
  • Bogie(The Launch vehicle transporter) is the special land transportation vehicle for the LV (Launch vehicle) which is used for not only the transportation-means of LV from LVAB(Launch Vehicle Assembly Building) to LP(Launch Pad) but also one of principal tools for launch operation sequence. Due to the multi-role of Bogie, The technical requirements of bogie are very complicated. Especially launch operation has performed with not only bogie but also many ground support equipments. So, it is impossible to establish technical requirements of bogie without whole understanding of launch operation. This paper was made for arranging whole launch operation sequence and technical requirements of bogie based on the this sequence.

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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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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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