Research on Power Flow Transmission through Elastic Structure into a Fluid-Filled Enclosure

Q2 Physics and Astronomy Advances in Acoustics and Vibration Pub Date : 2018-05-02 DOI:10.1155/2018/5273280

H. Rui, Li Chuangye, J. Laizhao, W. Weike

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引用次数: 2

Abstract

The work of this paper is backgrounded by prediction or evaluation and control of mechanical self-noise in sonar array cavity. The vibratory power flow transmission analysis is applied to reveal the overall vibration level of the fluid-structural coupled system. Through modal coupling analysis on the fluid-structural vibration of the fluid-filled enclosure with elastic boundaries, an efficient computational method is deduced to determine the vibratory power flow generated by exterior excitations on the outside surface of the elastic structure, including the total power flow entering into the fluid-structural coupled system and the net power flow transmitted into the hydroacoustic field. Characteristics of the coupled natural frequencies and modals are investigated by a numerical example of a rectangular water-filled cavity with five acoustic rigid walls and one elastic panel. Influential factors of power flow transmission characteristics are further discussed with the purpose of overall evaluation and reduction of the cavity water sound energy.

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流通过弹性结构进入充液壳体的电流传输研究

本文的工作以声纳阵列腔中机械自噪声的预测、评估和控制为背景。应用振动功率流传递分析来揭示流体-结构耦合系统的整体振动水平。通过对弹性边界充液外壳的流体-结构振动进行模态耦合分析，推导出了一种确定弹性结构外表面外部激励产生的振动功率流的有效计算方法，包括进入流体-结构耦合系统的总功率流和传输到水声场的净功率流。通过一个具有五个声学刚性壁和一个弹性板的矩形充水腔的数值例子，研究了耦合固有频率和模态的特性。为了全面评价和降低空腔水声能，进一步探讨了功率流传输特性的影响因素。

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Advances in Acoustics and Vibration ACOUSTICS-

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期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.