关键词: 声学, 邮轮, 统计能量分析法, 舱室噪声预报, 浮动地板

Abstract:

Based on the Statistical Energy Analysis, cabin noise is predicted and controlled in cruise. The main noise sources of cruise ship are analyzed, including air and structural noise generated by power equipment such as diesel engines, generators, propellers, air conditioners, fans and so on. Then, the SEA model of cruise ship is built by using VA One software, and the noise prediction of important cabins such as living and entertainment cabins and power equipment cabins are carried out. The spectrums of noise in those cabins are obtained, and compared with the limit value of IMO standard. The calculation results show that those cabins meet the requirements except the living room of four people. And it is found that the noise and vibration of the air conditioner room in the upper layer has great influence on the living room by analyzing the main noise sources of the living room. Then the different floating floors are applied to the air conditioner room to reduce noise of the living room. Through the comparative analysis the floating floor 2 and 3 have obvious effect of noise reduction on the living room. Finally, the acoustic characteristics of floating floor with different thickness of mineral wool are studied and there exists an optimal thickness.