Abstract: The problem of excessive noise in the cabin of the fully built ship can be effectively avoided by using a fast and effective method to control the cabin noise at the design stage. A three-layer acoustic insulation model of a 50mm marine composite rock wool board is built and its sound insulation is numerically calculated based on the wave analysis method. It is found that the sound insulation calculated by the wave analysis method is much larger than that measured in the lab. It therefore considers the influence of the sound bridge between the two composite rock wool boards on the overall sound insulation. The numerical results then agree well with the experimental results from 100 Hz to 1 600 Hz. This method can quickly calculate the sound insulation of the composite rock wool board. It is helpful for the designer to control the cabin noise at the design stage.

Key words: composite rock wool board, sound insulation, wave analysis, acoustic bridge

摘要： 船舶设计师使用快速有效的方法对船舶在设计阶段进行舱室噪声控制可以有效避免船舶在建造完成后舱室噪声超标问题产生。文章基于波分析方法对船用50 mm复合岩棉板建立三层板隔声模型,并对其隔声量进行数值计算。研究过程中发现,仅用波分析方法计算得到的隔声量远大于实验室实测值。鉴于复合岩棉板两块面板之间声桥对整体隔声量的影响,数值计算结果100~1 600 Hz,与实验值相吻合。该方法能够对复合岩棉板的隔声量进行快速计算,对设计师在设计阶段进行船舶舱室噪声控制有帮助。

关键词: 复合岩棉板, 隔声量, 波分析, 声桥