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    국내학술대회 제목 게시판 내용
    제목(국문) 고속철도차량 윤축부근의 소음과 진동 측정을 통한 주행중 감시의 기초연구
    제목(영문) Running Monitoring by the Noise and Vibration Measurement near the Wheelset of the High-Speed Trains : A Preliminary Research
    저자 이준석 (Lee, Jun Seok ,과학기술연합대학원대학교 ) ▷공저자네트워크등록하기
    최성훈 (Choi, Sunghoon ,한국철도기술연구원 ) ▷공저자 네트워크 보기
    박춘수 (Park, Choonsoo ,한국철도기술연구원 ) ▷공저자네트워크등록하기
    초록 This paper is focused on the analysis of the noise and vibration measured near the wheelset of the
    high-speed trains using a time-varying frequency transform as a preliminary research of running monitoring.
    Due to the non-stationary characteristics, it is necessary to examine noise and vibration of the train with
    time-varying frequency transforms. In this paper, the short-time Fourier transform method is utilized - the
    stored data is localized by modulating with a window function, and Fourier transform is taken to each
    localized data. For the examination, the non-stationary noise and vibration of the high-speed train's wheelset
    are measured by using some microphones and accelerometers, and those signals are stored in a on-board
    data acquisition system. The non-stationary random signal analyses with the short-time Fourier transform are
    performed, and the result are classified as follows; auto-spectral density, cross-spectral density, frequency
    response, and coherence functions. From those functions, it is possible to observe the frequency
    characteristics of sleepers, switchers, tunnels, and steel bridges. Also, some distinct peaks, which are not
    dependent upon the train's speed, are identified from the results.
    저널명 한국철도학회 추계학술대회 ▷관련저널보기
    VOL 8
    PAGE 1454-1462
    발표년도 2008
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