基于几何声学的船舶舱室声学设计方法  

Acoustic design method of ship's cabin based on geometrical acoustics

作　　者：冯爱景 魏强[2,3] 张大海[2,3] FENG Aijing;WEI Qiang;ZHANG Dahai(Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China;China Ship Development and Design Center,Wuhan 430064,China;National Key Laboratory on Ship Vibration and Noise,China Ship Development and Design Center,Wuhan 430064,China)

机构地区：[1]上海船用柴油机研究所,上海201108 [2]中国舰船研究设计中心,湖北武汉430064 [3]中国舰船研究设计中心船舶振动噪声重点实验室,湖北武汉430064

出　　处：《中国舰船研究》2017年第4期49-54,共6页Chinese Journal of Ship Research

摘　　要：[目的]为了在船舶舱室的众多噪声传递路径中选取最佳噪声控制位置及控制措施,[方法]基于几何声学理论中的声线跟踪法,考虑舱壁声透射的作用,提出声线搜索法。模拟船舶多舱室声场的分布,计算舱室声压。通过搜索目标舱室的供能声线,计算不同位置舱壁对目标舱室噪声的声灵敏度,根据灵敏度计算结果,设计船舶舱室降噪方案,优化舱室中高频噪声。[结果]利用该方法优化典型舱室噪声,噪声降低了7.3 dB。[结论]通过与统计能量法的对比分析,验证该方法可行,可指导船舶舱室降噪精细化设计。In light of the question of how to select the best noise control position and measures in the large noise transmission path of the cabins of a ship,based on the acoustic ray-tracing method in the theory of geometrical acoustics,and by considering the effect of the sound transmission of the bulkhead,this paper proposes the sound line search method.It is used to calculate the sound pressure of a ship's cabin,allowing the sound field distribution of multiple compartments to be simulated.The paper proposes a sound ray-searching method in which the acoustic sensitivity of different positions of the bulkhead to the noise of the target cabin is calculated by searching for the sound ray passing the target cabin.According to this,a cabin noise reduction plan can be designed to optimize medium and high frequency cabin noise.With this method,the noise of a typical cabin can be optimized and reduced by7.3dB.Through comparative analysis with the statistical energy method,it is proven that the method is feasible and can guide the refined design of noise reduction in ships'cabins.

关 键 词：舱室降噪 几何声学 声线跟踪法 声线搜索法 优化设计 

分 类 号：U661.44[交通运输工程—船舶及航道工程]