• Title/Summary/Keyword: 고속철도차량

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The technical trend of high speed train (고속철도차량의 기술 동향)

  • Baik, Kwang-Sun;Ohn, Jung-Ghun;Lee, Kang-Won
    • Proceedings of the KIEE Conference
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    • pp.1282-1284
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    • 2003
  • 현재 각 국에서 운영중이거나 개발중인 고속철도차량의 주요 장치의 적용 현황을 정리하고 보다 안정적이고 좋은 승차감을 유지하기 노력과 각각의 장점이 결합되어 진행되는 개발사례에 대하여 알아본다.

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Dynamic Characteristics of the Noise and Vibration of High-speed Train's Wheelset using Time-varying Frequency Analysis (시간-주파수 분석을 이용한 고속철도차량 윤축에서 발생하는 소음과 진동의 동적 특성)

  • Lee, Jun-Seok;Choi, Sung-Hoon;Kim, Sang-Soo;Park, Choon-Soo
    • Journal of the Korean Society for Railway
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    • v.12 no.4
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    • pp.465-471
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    • 2009
  • In this paper, a relationship between the noise and vibration of a high-speed train's wheelset is examined by using time-varying frequency analysis with random data analysis which together contributes to a reduction in the number of experimental running. The noise and vibration of the wheelset is mainly caused by an interaction between the wheel and railway which shows in non-stationary characteristics. For the analysis, they are measured by some microphones and accelerometers, and those signals are post-processed by time-varying frequency analysis with random data analysis. From the analysis, their methods are useful for analyzing the noise and vibration of high-speed train's wheelset.

A Study on the Air Pressure Endurance Test Device for High Speed Train Windows (고속철도차량 객차창문의 공기압력내구성 시험장치 개발에 관한 연구)

  • Chang, Dae-Sung;Yi, Won
    • Journal of the Korean Society for Railway
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    • v.15 no.2
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    • pp.104-108
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    • 2012
  • All of the Korean high speed train windows have been imported from abroad up to now. In this paper, the air pressure endurance test device for high speed train windows was studied and developed. This test device can create air pressure variation similar to train running real condition and carry out pressure endurance test according to international standard. Henceforward, this test device will be useful for domestic production of high speed train windows.

A Study on Interior Noise Characteristics of High-speed Trains (고속철도 차량의 실내소음 특성 연구)

  • Noh, Hee-Min;Choi, Sunghoon;Kim, Seog-Won;Hong, Suk-Yoon
    • Journal of the Korean Society for Railway
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    • v.16 no.1
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    • pp.14-19
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    • 2013
  • Because excessive interior noise when riding a high-speed train leads to annoyances, fatigue and stress for passengers, interior noise reduction methods should be considered. In particular, a high-speed train operated in various operation environments, and in South Korea, these include open fields and tunnels. Therefore, a specific study about changes in interior noise characteristics according to different environments is necessary. For this reason, the interior noise characteristics on a KTX train and on the KTX-Sancheon train were analyzed from noise measurements using microphones in this paper. Vibrations on the axles, bogies and floor were also measured, are these area are structural paths for interior noise. From this research, the interior noise characteristics according to the driving speed were deduced and the effects on interior noise by driving environments such as open fields and tunnels were investigated. Furthermore, the effect on interior noise by axles, bogies and floor vibrations were analyzed from a transfer function analysis.

Noise Sources Localization on High-Speed Trains by using a Microphone Array (마이크로폰 어레이를 이용한 고속철도 차량의 소음원 도출 연구)

  • Noh, Hee-Min;Cho, Jun-Ho;Choi, Sung-Hoon;Hong, Suk-Yoon
    • Journal of the Korean Society for Railway
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    • v.15 no.1
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    • pp.23-28
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    • 2012
  • In this paper, noise of Korean high-speed trains (KTX) running at different speed from 150 to 300km/h was measured by a microphone array system. From the measurement, relation between maximum sound pressure levels and train moving speeds of KTX was drawn and a regression coefficient from the relation was also derived. Moreover, increases of SPL with speeds of KTX were analyzed in the frequency domain. From the analysis, sound characteristics of passing-by noise of KTX were provided. Then, dominant noise source areas were obtained from the measurements and propagation patterns of KTX in vertical direction were also investigated. Finally, noise sources of KTX were identified from inspection of noise maps.

Assessment of the Pressure Transient Inside the Passenger Cabin of High-speed Train Using Computational Fluid Dynamics (전산유체역학을 이용한 고속철도차량 객실 내 압력변동 평가)

  • Kwon, Hyeok-Bin;Nam, Sung-Won;Kwak, Jong-Hyun
    • Journal of the Korean Society for Railway
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    • v.12 no.1
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    • pp.65-71
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    • 2009
  • The pressure transient inside the passenger cabin of high-speed train has been assessed using computational fluid dynamics (CFD) based on the axi-symmetric Navier-Stokes equation. The pressure change inside a train have been calculated using first order difference approximation based on a linear equation between the pressure change ratio inside a train and the pressure difference of inside and outside of the train. The numerical results show that the pressure change inside the new Korean high-seed train passing through a tunnel of Seoul-Busan high-speed line at the speed of 330km/h satisfied well the Korean regulation for pressure change inside a passenger cabin if the train is satisfying the train specification for airtightness required by the regulation.