双激励情况下结构-声耦合系统的声场研究
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- 英文论文题名：Research on sound field of structure-acoustic coupled enclosure under two exciting inputs
- 论文作者：何雪松 ; 游彩霞 ; 邢军华
- 英文论文作者：HE Xue-song ; YOU Cai-xia ; XING Jun-hua ; China Ship Development and Design Center ; National Key Laboratory on Ship Vibration & Noise ; School of Automobile and Traffic Engineering ; Wuhan University of Science & Technology
- 年：2016
- 作者机构：中国舰船研究设计中心船舶振动噪声重点实验室;武汉科技大学汽车与交通工程学院;
- 论文关键词：Trefftz法 ; WBM法 ; 结构-声学耦合 ; 封闭空腔 ; 声场分布
- 英文论文关键词：Trefftz method ; wave based method ; structure-acoustic coupled system ; enclosure ; sound field distribution
- 会议召开时间：2016-09-17
- 会议录名称：2016年度声学技术学术会议论文集
- 语种：中文
- 分类号：TB12;TB53
- 学会代码：SXJS
- 会议名称：2016年度声学技术学术会议
- 会议地点：中国湖北武汉
- 主办单位：船舶振动噪声重点实验室、湖北省声学学会
- 学会名称：《声学技术》编辑部
- 页数：5
- 文件大小：528k
- 原文格式：D
- 会议级别：全国
摘要
本文利用WBM方法,建立了一个双激励情况下的三维结构-声耦合系统模型。与基于单元的方法不同,此法将求解域内的动力学变量展开成精确满足控制方程齐次部分的全局波函数,和满足控制方程非齐次部分的特解函数的线性叠加,波函数的系数通过对边界条件进行加权余量积分得到,因此结构和声域都不再需要划分成更小的单元以及在每个单元内采用简单、近似的形函数来求解动力学方程。以一个双激励三维结构-声学空腔结构为研究实例,验证了模型的有效性,并讨论了吸声材料和阻尼对声场分布的影响规律
Based on wave-based method, a model has been developed for dynamic analysis of 3D coupled structure-acoustic systems under two exciting inputs. In contrast with the finite element method, in which the acoustic and structure domains are discretized into small elements and the dynamic equations are solved within each element using simple, approximate shape functions, the dynamic field variables are expressed as global wave function expansions, which exactly satisfy the governing dynamic equations. The contributions of the wave functions to the coupled structure-acoustic response result from an integral formulation of the boundary conditions. Based on a 3D structure-acoustic cavity example model, the validation of the method is proved, and the influence of damping and absorption to the sound filed distribution are discussed.
Based on wave-based method, a model has been developed for dynamic analysis of 3D coupled structure-acoustic systems under two exciting inputs. In contrast with the finite element method, in which the acoustic and structure domains are discretized into small elements and the dynamic equations are solved within each element using simple, approximate shape functions, the dynamic field variables are expressed as global wave function expansions, which exactly satisfy the governing dynamic equations. The contributions of the wave functions to the coupled structure-acoustic response result from an integral formulation of the boundary conditions. Based on a 3D structure-acoustic cavity example model, the validation of the method is proved, and the influence of damping and absorption to the sound filed distribution are discussed.
引文
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[9]张军,兆文忠,张维英.结构声辐射有限元/边界元法声学-结构灵敏度研究[J].振动工程学报,2005,18(3):365-370.ZHANG Jun,ZHAO Wenzhong,ZHANG Weiying.Research on acoustic-structure sensitivity basing on FEM and BEM[J],Journal of Vibration Engineering,2005,18(3):365-370.
[10]A.S.Sarigul,A.Secgin.A study on the applications of the acoustic design sensitivity analysis of the vibrating bodies[J].Applied acoustics,2004,65:1037-1065.
[2]施泽华,周海鸣.声弹性法及其应用[J].河海大学学报,1990,2(1):16-19.Shl Zehua;Zhou Haiming.Acoustic Elasticity and Its Application[J].Journal of Hohai University,1990,2(1):16-19.
[3]彭伟才,刘彦,原春晖.浮筏隔振系统有限元模型中基座的等效方法[J].中国舰船研究,2012,7(3):89-92.PENG Weicai,LIU Yan,YUAN Chunhui.Equivalent Machinery Base Method for Finite Element Analysis of Floating Raft Isolation System[J].Chinese Journal of Ship Research,2012,7(3):89-92
[4]Bouillard,Ihlenburg F.Error estimation and adaptivity for the finite element method in acoustics:2D and 3D applications[J].Computer methods in applied mechanics and engineering,1999,176:147-163.
[5]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,2007,6(3):71-74.Chen Meixia,Qiu Changlin,Luo Dong-ping Sound Radiation Analysis of Submerged Cylindrical Shell Excited by Interior Point Source Based on FEM/BEM.Chinese[J].Journal of Ship Research,2007,6(3):71-74.
[6]黎胜,赵德有.用边界元法计算结构振动辐射声场[J].大连理工大学学报,2000,40(4):391-394.LI Sheng,ZHAO Deyou.Calculation of acoustic field radiated by vibrating structures using BEM[J],Journal of Dalian University of Technology,2000,40(4):391-394.
[7]C.Vanmaele,D.Vandepitte,W.Desmet.An efficient wave based prediction technique for plate bending vibrations[J].Comput.Methods Appl.Mech.Engrg.,2007,45:110-136.
[8]Eisuke Kita,Yoichi Ikeda.Sensitivity scheme of boundary value problem of 2D Poisson equation by using Trefftz method[J].Engineering analysis with boundary elements,2005,29:738-748.
[9]张军,兆文忠,张维英.结构声辐射有限元/边界元法声学-结构灵敏度研究[J].振动工程学报,2005,18(3):365-370.ZHANG Jun,ZHAO Wenzhong,ZHANG Weiying.Research on acoustic-structure sensitivity basing on FEM and BEM[J],Journal of Vibration Engineering,2005,18(3):365-370.
[10]A.S.Sarigul,A.Secgin.A study on the applications of the acoustic design sensitivity analysis of the vibrating bodies[J].Applied acoustics,2004,65:1037-1065.