桨叶振动对螺旋桨垂向激励下潜艇结构振动与声辐射的影响  

The effect on the vibration and acoustic radiation of the whole submarine due to the vibration of propeller blades under vertical excitation

作　　者：王路才[1] 周其斗[2] WANG Lucai;ZHOU Qidou(Department of Navigation,Dalian Naval Academy,Dalian 116018,China;College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军大连舰艇学院航海系,辽宁大连116018 [2]海军工程大学舰船与海洋学院,湖北武汉430033

出　　处：《中国舰船研究》2020年第5期161-166,共6页Chinese Journal of Ship Research

摘　　要：[目的]研究螺旋桨对潜艇结构振动和声辐射造成的影响。[方法]以螺旋桨不定常激振力为输入,分别以螺旋桨、艇体和整艇外湿表面的振动及其辐射噪声为输出,建立SUBOFF模型艇的艇体通道声学传递函数(ATF),通过对比上述3部分湿表面的声学传递函数,对照传递函数谱峰频率与螺旋桨的模态频率及其振型,着重分析螺旋桨桨叶振动对螺旋桨垂向激励下潜艇结构振动与声辐射的影响规律。[结果]研究表明:螺旋桨对整艇结构振动和声辐射的影响主要与螺旋桨模态频率及单桨叶交叉振动振型有关。当螺旋桨出现单桨叶交叉振动振型时,螺旋桨和整艇湿表面的声学传递函数出现了明显的谱峰,谱峰频率与螺旋桨模态频率对应,而在艇体湿表面的声学传递函数中该谱峰并未被表现出来;在其他频段,艇体湿表面的声学传递函数基本反映了整艇结构的振动与声辐射特性。[结论]所得结果可为声学设计阶段潜艇螺旋桨的设计提供参考,亦可为整艇噪声源的识别分析提供新思路。[Objectives]The effect of propeller on the structural vibration and acoustic radiation of submarine is studied.[Methods]As such,the acoustic transfer function(ATF)of SUBOFF submarine is established by using the propeller unsteady exciting force as an input,and the outer wet-surface vibration and radiated noise of the propeller,hull and whole submarine as outputs accordingly.The three ATFs of above-mentioned wet-surfaces are compared in accordance with spectral peaks and the propeller's modal frequencies as well as the modal shapes,the effect analysis of propeller blades'vibration on the structural vibration and acoustic radiation under vertical excitation is highlighted.[Results]The results show that the effect of the propeller on the vibration and acoustic radiation of the whole submarine is mainly related to the propeller blades'modal frequencies and the single blade cross-vibration modes.The frequency response curves of the mean-square normal velocity level and the radiated acoustic power of the propeller's wet-surface will be plumped up at the single blade cross-vibration modes'frequencies,and so do curves of full submarine's wetsurface,but those of the hull's wet-surface are quite the contrary.At other frequency bands,the ATF of the hull's wet-surface can reflect the whole submarine's vibration and acoustic radiation characteristics.[Conclusions]These results can serve as a reference for the acoustic design of submarine propellers,and also offer new insight into the analysis and identification of noise sources.

关 键 词：螺旋桨 振动 辐射噪声 声学传递函数 

分 类 号：U661.44[交通运输工程—船舶及航道工程]