Diagnosis and control of abnormal vibration and noise in typical cabin of ship
The abnormal vibration and noise problem for a cabin of a ship was diagnosed.Through the analysis of the real ship test,it was found that the main reasons were local structural resonance and fan outlet noise.Based on the analysis results and engineering requirements,the vibration and noise optimization scheme were proposed.Numerical simulation method was used to evaluate the optimization effect of deck vibration response,and empirical equations were used to estim-ate the optimization effect of interior noise in the cabin.The noise reduction effect was conducted by real ship test.The test results showed that:the deck vibration velocity was reduced from 5mm/s to 1.33 mm/s,which met the limit value of 2 mm/s;the total sound pressure level of the cabin was 43.4 dB(A),which meets the limit value of 45 dB(A)of the HAB+(MODU)standard,so it could be seen that the vibration and noise control optimization program had achieved the expected control ef-fect.This study could provide reference for the diagnosis and identification of abnormal vibration and noise in ship cabin,and provide technical support for the design of vibration and noise control.
vibration and noise controlvibration and noise diagnosiscabin
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