http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
격자볼츠만기법을 이용한 전동차용 견인전동기 공력소음 저감 설계
김준형(J.H. Kim),기호철(H.C. Ki),변성준(S.J. Byun),노주현(J.H. Rho) 한국전산유체공학회 2017 한국전산유체공학회지 Vol.22 No.1
The aerodynamic noise reduction of railway traction motor is required to satisfy new enhanced Korean noise regulations for a train. This paper is the study result on a noise reduction of a railway traction motor using Lattice Boltzmann Method(LBM). To verify the reliability of numerical analysis, the noise performance of the base model evaluated using LBM, and calculated result was compared with the experimental data. In addition, main noise sources were selected to design parameters through analyzing the flow field of the base model. Based on the noise sources analysis result, a design improvement model of traction motor for this study was derived to reduce the noise. The performance of a design improvement model was evaluated by applying a validated numerical scheme. As a result, it was confirmed that the noise was reduced due to the suppression of the internal turbulent flow components.
이승일(S. I. Lee),기호철(H. C. Ki),김보성(B. S. Kim),송문석(B. S. Kim) 한국도시철도학회 2014 한국도시철도학회논문집 Vol.2 No.1
Driving on the track of a railway vehicle running noise and peripheral devices can be distinguished by the behavior of the noise, and speed 200 km/h below the railway vehicle"s main source of noise driving the friction that occurs between wheel and rail is the noise. In this study, the friction of railway vehicle in order to measure the noise sound using the acoustic camera to track the position of driving the generation of noise sources, and that the cause was investigated. As a result, an increase in speed up, were found to increase the friction noise. In addition, the noise source and the acoustic camera was able to measure its size.