An efficient method was presented for the prediction of structure-borne sound transmission in ship engine compartment structures. Statistical energy analysis (SEA) was used, and the equations of subsystems were also presented. In the method developed, the input power from engine surface ra?diated noise measurement was evaluated to acmeve precise data. The theoretical formula was used to estimate the parameters of SEA. The effectiveness of the present method was illustrated by the com?parison between the predictive value and the actual measurement. The comparison result shows that the calculation value of engine compartment noise level is 93.8 dB(A), which is lower than the test value by 2.9 dB(A) ; the maximum error is 4 dB(A), the minimum is 0.3 dB(A) at main frequency band of 315 Hz; the predictive curve accords with the actual.
Key words
acoustics /
ship compartment /
noise /
statistical energy analysis method
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Footnotes
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