• 제목/요약/키워드: 파워반감대역법

검색결과 1건 처리시간 0.015초

내부손실계수 측정을 위한 실험 방법 (Experimental Methods for the Measurement of Damping Loss Factors)

  • 김관주;최승권
    • 소음진동
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    • 제9권6호
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    • pp.1187-1192
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    • 1999
  • The purpose of this study is to determine the most appropriate experimental method of the measurement of "damping loss factors" (DLF) for the statistical energy analysis(SEA) calculation. The successful prediction of vibration levels from the structure is critically dependent on the accurate estimation of DLF's not only in conventional vibration analysis but especially in SEA. Unforunately, calculation of accurate DLF is not an easy matter. So experimental methods are made use of for the DLF values. Three kinds of experimental methods for estimating DLF, i.e. decay rate method, half-power bandwidth method and power balance method, are presented and tests are carried out for the plate and the cylindrical shell examples. Pro and con of each methods is reviewed. Finally, calculated DLF values are used for vibration level estimation using commercial SEA software and compared with measured vibration data.tion data.

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