Study On The Noise Prediction Of Polar Cabin

At present, navigation conditions in the Arctic is continuously improved, and the demand for polar ships in the future will be more and more high, and people will be more and more requirement of the polar ships performance, with the ship in seeking security and rapidity, also need to consider the comfort. In order to ensure the effective operation of the equipment, and the living and working environment of the sailor, the ship’s cabin noise control is becoming more and more important.This paper is aimed at analyzing and predicting the layers of cabins’ sound pressure level of the polar transport ship’s superstructure, and providing corresponding noise control solutions. Contrast every cabins’ sound pressure level before and after noise control treatments by corresponding noise control solutions. Target cabins’ sound pressure level complies with the requirements of the related noise control criterion, and expecting to reach the effect of noise reduction.The specific research works are as follows:1. Summarized the methods of noise analysis and control of naval architecture and ocean engineering, and the basic concept of the acoustic and statistical energy analysis method was introduced.2. To establish a SEA model base on VA-One, and according to relevant data to set SEA parameters, it is concluded that the superstructure of polar ship noise sound pressure level of the numerical prediction. Discussed the temperature and the way the stiffener layout on the effects of cabin noise. It is concluded that with the same incentive conditions, the lower temperature, the cabin pressure level is higher. The sound pressure level of cabin along the direction of the stiffener layout is higher than at the direction of the vertical stiffener layout. Stiffener layout, the more intensive the better effect.3. On superstructure cabin noise reduction processing, successive studied for the sound insulation of the single wall, the double wall and the double composite wall. Being the one superfine glass wool as the sound-absorbing material in VA-One, and discussed the effect of noise reduction with the changes of thickness and laying. Compared the sound insulation performance of the laying 50 mm superfine glass wool in the middle of 100 mm double wall at different sides. It is concluded that the superfine glass wool laying in the double wall while away from the strong sound source is the ideal compound sound absorption structure, and on this basis, to optimize the thickness of the absorption material, with 23 mm is the optimal thickness for the double wall which interval is 100 mm.4. The simulation results showed up by curve graph and sound pressure level plot and form, and we could observe the effects of pre-processing and post-processing intuitively. It could achieve the desired purpose essentially in the noise prediction and control treatment of polar ship’s cabins. It had certain guidance and supplementary role in the view of prediction process theory and noise control treatments scheme. It had certain value for engineering application in improving the environment quality of polar ship’s cabins and reducing construction design cost and shortening the production cycle for the polar ships.