국내 최대 기계 및 로봇 연구정보

국내학술대회

114

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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