利用复声功率分析板-腔声传输中有源结构声控制机理
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- 英文论文题名：Analysis of control mechanisms in ASAC of sound transmission through panel-cavity system using complex sound power
- 论文作者：苏常伟 ; 朱海潮 ; 毛荣富 ; 苏俊博
- 英文论文作者：SU Chang-wei ; ZHU Hai-chao ; MAO Rong-fu ; SU Jun-bo ; Institute of Noise & vibration ; Naval University of Engineering ; National Key Laboratory on Ship Vibration & Noise
- 年：2016
- 作者机构：海军工程大学振动与噪声研究所;船舶振动噪声重点实验室;
- 论文关键词：控制机理 ; 复声功率 ; 有源结构声控制 ; 板—腔声传输
- 英文论文关键词：control mechanism ; complex sound power ; active structural acoustic control ; sound transmission through panel-cavity
- 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：TB535
- 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：398k
- 原文格式：D
- 会议级别：全国
摘要
在板—腔结构声传输中,腔体内噪声是由弹性板受激振动进而诱发向内辐射而产生的,因此弹性板的辐射声功率和控制机理之间必然存在联系。本文以复声功率为出发点,利用声通过一块矩形薄板向封闭空腔传入的ASAC理论分析模型,进行了板-腔结构声传输的ASAC机理分析,得到了一系列结论。一方面,指出了模态重组和模态抑制两种控制机理的具体内涵;另一方面,由虚声功率W_(Im)在最优控制力幅值附近存在"局部增大"证明了:对于结构控制模态,控制机理同时包含模态抑制和模态重组。
In sound transmission through panel-cavity, the noise in the cavity is caused by the elastic vibrating panel which radiates sound into the cavity. Thus, we come to a conclusion, there is relationship between the radiated sound power of the elastic panel and control mechanisms. In this paper, taking complex sound power as starting point, control mechanisms in ASAC of sound transmission through panel-cavity system are analyzed using the analytical model of active structural acoustic control of noise transmission through a panel into a cavity, and some valuable conclusions have been obtained. On the one hand, the concrete connotations of modal rearrangement and modal control are pointed out; On the other hand, the local increase of the reactive power near the optimal control point indicates that the mechanism of modal rearrangement also exists in the panel controlled condition.
In sound transmission through panel-cavity, the noise in the cavity is caused by the elastic vibrating panel which radiates sound into the cavity. Thus, we come to a conclusion, there is relationship between the radiated sound power of the elastic panel and control mechanisms. In this paper, taking complex sound power as starting point, control mechanisms in ASAC of sound transmission through panel-cavity system are analyzed using the analytical model of active structural acoustic control of noise transmission through a panel into a cavity, and some valuable conclusions have been obtained. On the one hand, the concrete connotations of modal rearrangement and modal control are pointed out; On the other hand, the local increase of the reactive power near the optimal control point indicates that the mechanism of modal rearrangement also exists in the panel controlled condition.
引文
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[2]丁少虎,陈克安,马玺越,等.水下圆柱壳声辐射有源力控制及机理分析[J].振动工程学报,2014,27(4):547-554.DING Shaohu,CHEN Kean,MA Xiyue,etal.Active structural acoustic control of a submerged finite cylindrical shell and its physical mechanism[J].Journal of Vibration Engineering,2014,27(4):547-554.
[3]Pan J,Hansen C H,Bies D A.Active control of noise transmission through a panel into a cavity:I.Analytical study[J].J.Acoust.Soc.Am.,1990,87(5):2098-2108.
[4]Pan J,Hansen C H.Active control of noise transmission through a panel into a cavity.II:Experimental study[J].J.Acoust.Soc.Am.,1991,90(3):1488-1492.
[5]Snyder S D,Hansen C H.Mechanisms of active noise control by vibration sources[J].Journal of Sound and Vibration,1991,147(3):519-525.
[6]Snyder S D,Hansen C H.The Design of Systems to Control Actively Periodic Sound Transmission Into Enclosed Spaces,Part II:Mechanisms and Trends[J].Journal of Sound and Vibration,1994,170(4):451-472.
[7]Qiu X J,Sha J Z,Yang J.Mechanisms of active control of noise transmission through a panel into a cavity using a point force actuator on the panel[J].Journal of Sound and Vibration,1995,182(1):167-170.