Experiment Study on Toilet Flushing Noise and Numerical Analysis of Transient Cabin Noise of Cruise Ships
The characteristics of the transient noise source on board and the numerical simulation of the transient noise in the cabin are important contents in the comfort design of cruise ships.In this paper,the cabin transient noise source and vacuum toilet of the cruise ships are taken as the research object.The time-frequency characteristics of the flushing noise of the toilet are tested.It is found that this type of toilet is very noisy at the beginning and end of the flushing stage,and the peak sound pressure level in the time domain reaches 115 dB.The noise energy is mainly concentrated in the frequency band of 200-500 Hz.Then,the numerical simulation of the transient cabin noise under the action of the toilet noise source is per-formed in detail.The acoustic boundary element method and the statistical energy analysis method are applied to calculate the transient noise response of the cabin to the toilet flushing process in the frequency band of 20-8 000 Hz.The numerical simulation results are compared with the experimental measurement results.It is found that the average error of the overall sound pressure level is 1.17 dB and the average correlation coefficient is 0.912,which show that the numerical prediction re-sults of transient cabin noise are in good agreement with the experimental measurement results.The proposed method can ef-fectively predict the transient cabin noise of cruise ships.
acousticstransient noisetoilet noise sourceboundary element methodship cabin noise
万方数据
维普
