考虑船体声散射效应的螺旋桨噪声频域预报  

Propeller Noise Prediction Considering Hull Scattering Effect in Frequency Domain

作　　者：付建 李嘉[1] 曾帆[1] FU Jian;LI Jia;ZENG Fan(Naval Submarine Academy,Qingdao 266100,China)

机构地区：[1]海军潜艇学院,山东青岛266100

出　　处：《船舶力学》2022年第12期1879-1887,共9页Journal of Ship Mechanics

基　　金：国防装备预研项目(41410030102)。

摘　　要：为了分析船体散射效应对船尾螺旋桨声场的影响,结合点源模型和边界元方法提出任意边界条件下螺旋桨噪声的频域预报方法,该方法可以分别计算螺旋桨的入射声场和船体散射声场,定量评估船体的声散射效应。文中以5415船型和大侧斜螺旋桨为对象,首先基于计算流体力学模拟“艇+桨”的瞬态流场特征,然后考虑船体的声散射效应,计算分析螺旋桨的声场特征。结果表明:螺旋桨的散射声场与入射声场存在较大差异,考虑船体声散射效应后,螺旋桨声压低于入射声压,且其影响不可忽略。In order to analyze the effect of hull sound scattering on the sound field of propeller at stern,a frequency-domain prediction method of propeller noise at arbitrary boundary conditions is presented by combining the point source model and boundary element method,by which the incident sound field of propeller and scattering sound field of hull can be separately calculated and the sound scattering effect of hull can be quantitatively evaluated.With the DTMB 5415 ship and highly-skewed propeller taken as objects,the transient flow field of‘ship+propeller’was firstly simulated based on computational fluid dynamics,and then the sound field of propeller was calculated considering the sound scattering effect of hull.The results show that there is a significant difference between the scattering sound field and incident sound field of propeller,and that the propeller sound pressure is lower than the incident sound pressure after considering the hull sound scattering effect,which is not negligible.

关 键 词：螺旋桨噪声 散射效应 点源模型 边界元法 计算流体力学 

分 类 号：U661.44[交通运输工程—船舶及航道工程]