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김준곤(Jun-Kon Kim),노희민(Hee-Min Noh),김상수(Sang-Soo Kim),김석원(Seog-Won Kim),조미령(Mi-Ryeong Jo) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
In this paper, ride comfort analysis of cab in the high-speed train named HEMU-430X was conducted. The train was newly-developed electric multiple units for achieving 430 km/h. Moreover, the continuous ride comfort method was used for investigating vibrations about cabs during the train operation. From the results, the tendency that the ride comfort index was increased at the speed of the high-speed train. In addition, the results provided that most obtained ride comfort values were in stable regions.
OTPA방법을 이용한 철도차량 실내 소음 기여도 분석 연구
정재덕(Jae-Deok Jung),홍석윤(Suk-Yoon Hong),송지훈(Jee-Hun Song),권현웅(Hyun-Woung Kwon),노희민(Hee-Min Noh),김준곤(Jun-Kon Kim) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.1
The sensitivity of interior noise that the passengers perceive is comparatively high in the train, and structure-borne and air-borne types of noises come into the train. In this paper, to analyze contributions of these noise sources operational transfer path analysis(OTPA) is used. OTPA has some advantages of executing the contribution rates of several sources simultaneously, and in this work, 29 points are measured while running. Transfer functions between reference measurement points and response measurement points are calculated by the singular value decomposition(SVD) and Principal component analysis(PCA) method, and the frequency characteristics of the noise source are successfully derived. Also the interior noise is predicted and compared with measurement data to show the reliability.