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易倍体育官网:近期,易倍体育官网-教师孙瑶等在《Journal of Sound and Vibration》上发表研究成果

发布时间:2017-03-31动态浏览次数:151

    近期,易倍体育官网-教师孙瑶等的“The use of an active controlled enclosure to attenuate soundradiation from a heavy radiator”研究成果在《Journal of Sound and Vibration》上发表。

论文简介如下:

    Active structural acoustical control usually experiencesdifficulty in the control of heavysources or sources where direct applications of control forces are not practical. To overcome this difficulty, an active controlled enclosure, which forms a cavity with both flexibleand open boundary, is employed. Thisconfiguration permits indirect implementation ofactive control in which the control inputs can be applied to subsidiarystructures otherthan the sources. To determine the control effectiveness of the configuration, the vibroacoustic behavior of the system, which consists of a top plate with an open, a sound cavityand a source panel, is investigated in this paper. A complete mathematical model of thesystem is formulated involving modified Fourier series formulations and the governingequations are solved using the Rayleigh-Ritz method. The couplingmechanisms of a partlyopened cavity and a plate are analysed in terms of modal responses and directivity patterns. Furthermore, to attenuate sound power radiated from both the top panel and the open, two strategies are studied: minimizing the total radiated power and the cancellationof volume velocity. Moreover, threecontrol configurations are compared, using a pointforce on the control panel (structural control), using a sound source in the cavity(acousticalcontrol) and applying hybridstructural-acoustical control. In addition, theeffects of boundary condition of the control panel on the sound radiation and controlperformance are discussed.

本网全文下载:dx.doi.org/10.1016/j.jsv.2016.12.016

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