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首页> 美国卫生研究院文献>Materials >Study of a Nonlinear Membrane Absorber Applied to 3D Acoustic Cavity for Low Frequency Broadband Noise Control
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Study of a Nonlinear Membrane Absorber Applied to 3D Acoustic Cavity for Low Frequency Broadband Noise Control

机译：用于低频宽带噪声控制的3D声腔非线性膜吸收器的研究

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摘要

As a new approach to passive noise control in low frequency domain, the targeted energy transfer (TET) technique has been applied to the 3D fields of acoustics. The nonlinear membrane absorber based on the TET can reduce the low frequency noise inside the 3D acoustic cavity. The TET phenomenon inside the 3D acoustic cavity has firstly investigated by a two degrees-of-freedom (DOF) system, which is comprised by an acoustic mode and a nonlinear membrane without the pre-stress. In order to control the low frequency broadband noise inside 3D acoustic cavity and consider the influence of the pre-stress for the TET, a general model of the system with several acoustic modes of 3D acoustic cavity and one nonlinear membrane is built and studied in this paper. By using the harmonic balance method and the numerical method, the nonlinear normal modes and the forced responses are analyzed. Meanwhile, the influence of the pre-stress of the nonlinear membrane for the TET is investigated. The desired working zones of the nonlinear membrane absorber for the broadband noise are investigated. It can be helpful to design the nonlinear membrane according the dimension of 3D acoustic cavity to control the low frequency broadband noise.
机译：作为低频域无源噪声控制的一种新方法，目标能量转移（TET）技术已应用于声学的3D领域。基于TET的非线性膜吸收器可以减少3D声腔内部的低频噪声。首先通过两自由度（DOF）系统研究了3D声腔内部的TET现象，该系统由声学模式和没有预应力的非线性膜组成。为了控制3D声腔内部的低频宽带噪声并考虑预应力对TET的影响，建立并研究了具有3D声腔的几种声模和一个非线性膜的系统的通用模型。纸。通过使用谐波平衡法和数值方法，分析了非线性法线模式和强迫响应。同时，研究了非线性膜预应力对TET的影响。研究了用于宽带噪声的非线性膜吸收器的所需工作区域。根据3D声腔的尺寸设计非线性膜，以控制低频宽带噪声可能会有所帮助。

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