• 제목/요약/키워드: 소음 방사

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배관 표면진동과 방사효율을 이용한 배관 소음예측기법 연구 (A Study on the Radiated Noise the Prediction in the Pipe by Fluid Induced Vibration using the Radiation Efficiency and Pipe Surface Vibration)

  • 이종주;박경훈;정우진;서영수
    • 한국소음진동공학회논문집
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    • 제24권10호
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    • pp.763-769
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    • 2014

  • This study is on the experiment and prediction of the pipe noise due to the internal fluid. The vibration of pipe external surface and noise in air were measured according to the internal fluid velocity and pipe type. In the experiment, the vibration and noise level of the straight pipe and rounded pipes show that the vibration and noise level are almost same. The 900 mitred pipe shows the high vibration and noise level. In the prediction of noise due to the internal flow, the method using the pipe surface vibration and radiation efficiency shows good agreement with experimental result.

  • https://doi.org/10.5050/KSNVE.2014.24.10.763 인용 PDF KSCI KPUBS HTML

압축기 쉘의 방사소음에 관한 연구 (A Study on Noise Radiation of Compressor Shell)

  • 채승훈;황원걸;오일권;박성우;류기오
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계학술대회논문집
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    • pp.164-167
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    • 2005

  • The noise level of refrigerating units is becoming more important to the manufacturer and the user of the product. Invariably, the compressor is a significant contributor to the overall noise level. Especially a major portion of the noise radiated by the vibration of the compressor shell. This paper presents an approach to relate the dynamic characteristics of the compressor shell with the noise radiation properties and the methods of redesigning the compressor shell to reduce the noise radiation. To relate the dynamic characteristics of the compressor shell with the noise radiation properties, the vibration and radiated sound were measured with the running compressor. Based on the results of these tests correlations between the shell vibration characteristics and the noise radiation properties are identified It was found that the vibration on the compressor shell and the noise radiated from the compressor were stronglycorrelatedincertainfrequencybands.

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