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다차원 스펙트럼 해석법을 이용한 로드노이즈의 전달경로 해석 및 실내음압 예측
박상길(Sang-Gil Park),강귀현(Kwi-Hyun Kang),황성욱(Sung-Uk Hwang),오기석(Ki-Seok Oh),노국희(Kuk-Hee Rho),오재응(Jae-Eung Oh) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
This paper presents a the method for estimating the noise source contribution on the road noise of the vehicle in a multiple input system where the input sources may be coherent with each other. By coherence function method, it is found that the biggest part of the noise source in the road noise is generated by structural vibration on the mechanical-acoustic transfer functions of vehicles. This analysis is modeled as four input/single output system because the noise is generated with four wheels that mechanism of the road noise is very complicated. The coherence function method is proved to be useful tool for identifying of noise source. The overall levels of the interior noise be coherence function method are compared with those measured and calculated by the frequency response function approach using mechanical excitation test. The experimental results have shown a good agreement with the results calculated by the coherence function method when the input sources are coherent strongly each other. The estimation of the road noise indicates that significant coherent can be achieved in the vehicle interior noise.
다차원 스펙트럼 해석법을 이용한 로드노이즈의 전달경로 해석 및 실내음압 예측
박상길(Park, Sang-Gil),강귀현(Kang, Kwi-Hyun),황성욱(Hwang, Sung-Wook),오기석(Oh, Ki-Seok),노국희(Rho, Kuk-Hee),오재응(Oh, Jae-Eung) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.11
This paper presents a the method for estimating the noise source contribution on the road noise of the vehicle in a multiple input system where the input sources may be coherent with each other. By coherence function method, it is found that the biggest part of the noise source in the road noise is generated by structural vibration on the mechanical-acoustic transfer functions of vehicles. This analysis is modeled as four input/single output system because the noise is generated with four wheels that mechanism of the road noise is very complicated. The coherence function method is proved to be useful tool for identifying of noise source. The overall levels of the interior noise be coherence function method are compared with those measured and calculated by the frequency response function approach using mechanical excitation test. The experimental results have shown a good agreement with the results calculated by the coherence function method when the input sources are coherent strongly each other. The estimation of the road noise indicates that significant coherent can be achieved in the vehicle interior noise.