Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)
- Volume 13 Issue 1
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- Pages.20-28
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- 1989
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- 1225-5963(pISSN)
DOI QR Code
Prediction of Sound Radiation Power from Coupled Structures Uusing SEA
SEA법에 의한 결합구조물의 음향방사파워 예측
- Published : 1989.01.01
Abstract
SEA(Statistical Energy Analysis) method has been applied to predict the sound radiation power from vibrating machinery. In this study, sound radiation power was predicted from coupled structures by transmission of vibration, which composed of two plates welded into an L shape. The predicted sound radiation power is in agreement within 2 or 3 dB on octave band comparing with values obtained from direct measurements. Also, in order to prove the validity of this method in changes of sound radiation power associated with modifications to structures, rubber pad was stuck on a plate. The results agree approximately within 3 or 5 dB. And SEA method is valuable for the optimal design to reduce the noise. Additionally, this paper suggests that the logarithmic decrement method is valid as the one for finding the loss factor.
본 연구에서는 경계조건에 대한 음향 방사율을 계산하고, 또한 각각의 구조물을 가진하여 진동을 측정하여 음향 방사 파워를 예측한다.
Keywords
- Statistical Energy Analysis;
- Sound Radiation Power;
- Radiation Efficiency;
- Loss Factor;
- Total Noise Reduction
- 통계적 에너지 해석;
- 음향 방사파워;
- 방사율;
- 손실계수;
- 총소음저감;