탄성지지된 박용 펌프의 고체음저감에 관한 연구
A Study on Structure-Borne Noise Reduction for Resiliently Mounted Pumps for Ship
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Abstract
In this paper, SBN (Structure-Borne Noise) reduction of resiliently mounted machinery and effect of the foundation impedance on mount performance is studied. SBN reduction through the mount is analyzed by using two theoretical models; mass-spring model and wave model, in which longitudinal wave propagation is included. It is found that floor impedance greatly affects SBN reduction through lower mount, while it is almost negligible to SBN reduction through upper mount. Comparisons between measurement and predictions shows that the mass-spring model is valid only in low frequency range below few hundred Hz, while for high frequency ranges longitudinal wave propagation in the mount must be considered.
참고문헌 (6)
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- "Vibration and Shock in Damped Mechanical Systems", chapter 3 (1968), Inc