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    국내학술대회 제목 게시판 내용
    제목(국문) 시간 주파수 - 변환을 이용한 고속철도차량의 동특성 분석
    제목(영문) Analysis of Dynamic Characteristics of High Speed Trains Using a Time Varying Frequency Transform
    저자 이준석 (Lee, Jun Seok ,과학기술연합대학원대학교/한국철도기술연구원 ) ▷공저자네트워크등록하기
    최성훈 (Choi, Sunghoon ,한국철도기술연구원 ) ▷공저자 네트워크 보기
    김상수 (Kim Sang-Soo ,한국철도기술연구원 ) ▷공저자네트워크등록하기
    박춘수 (Park, Choonsoo ,한국철도기술연구원 ) ▷공저자네트워크등록하기
    초록 This paper examined dynamic characteristics of high speed trains using a time varying frequency transform.
    Fourier transform based methods are frequently used for the calculation of the dynamic characteristics of trains
    in the frequency domain, but they cannot represent the time-varying characteristics. Therefore it is necessary to
    examine their characteristics using a time-varying frequency transform. For the examination, the non-stationary
    vibration of wheelset, bogie, and carbody are measured using accelerometers and stored in a data aquisition
    system. They are processed with localization of the data by modulating with a window function, and Fourier
    transform is taken to each localized data, called the short-time Fourier transform. From the processed results,
    time varying auto-spectral density, cross-spectral density, frequency response, and coherence functions have been
    calculated. From the analysis, it is confirmed that the time varying frequency transform is a useful method for
    analyzing the dynamic characteristics of high speed trains.
    저널명 한국철도학회 춘계학술대회 ▷관련저널보기
    VOL 8
    PAGE 174
    발표년도 2008
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