基于统计能量法研究肋骨对双层圆柱壳声辐射特性的影响
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摘要
[目的]潜艇的主要结构形式是环肋圆柱壳,目前关于肋骨对圆柱壳声辐射特性影响的研究大多集中在中、低频,但是振动声学问题涉及到更宽的频率范围。[方法]采用统计能量法研究宽频范围内肋骨对圆柱壳声辐射特性的影响。首先,分析圆柱壳增加肋骨后统计能量参数的变化;然后,研究耐压壳、外壳分别增加肋骨、改变肋骨间距、改变肋骨形状对圆柱壳声辐射特性的影响;最后,分析激振力作用在不同位置时,环肋圆柱壳声辐射特性的差异。[结果]得到了肋骨影响下双层圆柱壳在500 Hz～100 kHz范围内的统计能量参数和辐射噪声变化规律。[结论]研究结果对合理选用肋骨降低潜艇的振动与辐射噪声有一定参考作用。
[Objectives]The main structure of a submarine is a ring-stiffened cylindrical shell. At present,most research into the effects of ribs on the acoustic radiation characteristics of cylindrical shells is concentrated on middle and low frequencies,but the acoustic vibration problems involve a wider frequency range.[Methods]By using statistical energy analysis,we can study the effects of ribs on the acoustic radiation characteristics of a cylindrical shell in a wider frequency range. The changes in the SEA parameters induced by ribs are analyzed and the influence of different rib parameters on the radiation noise of a double cylindrical shell are studied. Then,the difference of ring-stiffened cylindrical shell caused by excitation force acting on different positions is studied.[Results]The variation rule of SEA parameters and radiation noise in the range 500 Hz～100 kHz of double cylindrical shell influenced by ribs is obtained.[Conclusions]The findings in this study can provide valuable references for reducing the radiation of submarines through the proper use of ribs.
[Objectives]The main structure of a submarine is a ring-stiffened cylindrical shell. At present,most research into the effects of ribs on the acoustic radiation characteristics of cylindrical shells is concentrated on middle and low frequencies,but the acoustic vibration problems involve a wider frequency range.[Methods]By using statistical energy analysis,we can study the effects of ribs on the acoustic radiation characteristics of a cylindrical shell in a wider frequency range. The changes in the SEA parameters induced by ribs are analyzed and the influence of different rib parameters on the radiation noise of a double cylindrical shell are studied. Then,the difference of ring-stiffened cylindrical shell caused by excitation force acting on different positions is studied.[Results]The variation rule of SEA parameters and radiation noise in the range 500 Hz～100 kHz of double cylindrical shell influenced by ribs is obtained.[Conclusions]The findings in this study can provide valuable references for reducing the radiation of submarines through the proper use of ribs.
引文
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[2]纪刚,周其斗,谢剑波.以实测振动数据为输入的水下结构振动与辐射噪声预报[J].振动与冲击,2011,30(11):135-141,147.JI G,ZHOU Q D,XIE J B.Prediction of dynamic response and acoustic radiation from an underwater structure based on vibration data got from experiment[J].Journal of Vibration and Shock,2011,30(11):135-141,147(in Chinese).
[3]纪刚,张纬康,周其斗,等.圆柱壳的力辐射模态分析与噪声控制[J].海军工程大学学报,2014,26(4):83-87,91.JI G,ZHANG W K,ZHOU Q D,et al.Force radiation mode analysis and acoustic reduction of cylindrical structure[J].Journal of Naval University of Engineering,2014,26(4):83-87,91(in Chinese).
[4]陈美霞,邱昌林,骆东平.基于FEM/BEM法的内部声激励水下圆柱壳声辐射计算[J].中国舰船研究,2007,2(6):50-54.CHEN M X,QIU C L,LUO D P.Sound radiation analysis of submerged cylindrical shell excited by interior point source based on FEM/BEM[J].Chinese Journal of Ship Research,2007,2(6):50-54(in Chinese).
[5]王路才,周其斗,纪刚.肋骨侧向加强对环肋圆柱壳水下振动与声辐射的影响[J].中国舰船研究,2013,8(2):84-89.WANG L C,ZHOU Q D,JI G.Effects of lateral reinforced plates on underwater vibro-acoustic features of ring-stiffened cylindrical shells[J].Chinese Journal of Ship Research,2013,8(2):84-89(in Chinese).
[6]LYON R H,DEJONG R G.Theory and application of statistical energy analysis[M].2nd ed.Newton Massachusetts:Butterworth-Heinemann,1995.
[7]COTONI V,LANGLEY R S,SHORTER P J.A statistical energy analysis subsystem formulation using finite element and periodic structure theory[J].Journal of Sound and Vibration,2008,318(4/5):1077-1108.
[8]姚德源,王其政.统计能量分析原理及其应用[M].北京:北京理工大学出版社,1995:4
[9]尹剑飞,温激鸿,肖勇,等.基于高级统计能量分析的周期加筋板振动特性研究[J].物理学报,2015,64(13):0134301.YIN J F,WEN J H,XIAO Y,et al.Study of vibration propagation in periodic rib-stiffened plates using advanced statistical energy analysis[J].Acta Physica Sinica,2015,64(13):0134301(in Chinese).
[10]ICHCHOUM N,BERTHAUT J,COLLET M.Multimode wave propagation in ribbed plates:part I,wavenumber-space characteristics[J].International Journal of Solids and Structures,2008,45(5):1179-1195.