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首页> 外文期刊>International journal of structural stability and dynamics >Broad-Band Noise Mitigation in Vibrating Annular Plates by Dynamic Absorbers
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Broad-Band Noise Mitigation in Vibrating Annular Plates by Dynamic Absorbers

机译：动态吸收器减轻环形环形板的宽带噪声

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摘要

Steady-state and transient acoustic radiation characteristics of clamped-free annular plate with tuned mass damper (TMD) device is studied. Galerkin's procedure is employed to obtain the transverse vibration of the annular disk. Based on the Rayleigh integral approach, acoustic pressure radiation is obtained and subsequently the modal sound power and modal radiation efficiency are obtained. A new formulation for the transient acoustic pressure in Laplace domain is presented for the first time in this paper. Durbin's numerical Laplace transform inversion scheme is employed to obtain the response spectrum. The optimum parameters of vibration absorbers are proposed for suppressing the dynamic vibration and acoustic pressure. A parametric study is carried out and the effects of vibration absorber characteristics are investigated using the analytical procedure. Limiting cases are considered and good agreements with the finite element solution, as well as with those available in the literature, are achieved.
机译：研究了带有调谐质量阻尼器（TMD）的免夹紧环形板的稳态和瞬态声辐射特性。采用Galerkin的方法获得环形盘的横向振动。基于瑞利积分法，获得声压辐射，随后获得模态声功率和模态辐射效率。本文首次提出了Laplace域瞬态声压的新公式。采用Durbin的数值Laplace变换反演方案获得响应谱。为抑制动态振动和声压，提出了减振器的最佳参数。进行了参数研究，并使用分析程序研究了减振器特性的影响。考虑了极限情况，并与有限元解决方案以及文献中的那些达成了良好的协议。

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