基于膜模态的反数值声学声源表征

IF 1.3 4区医学 Q3 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY

Noise & Health Pub Date : 2023-05-25 DOI:10.3397/nc_2023_0054

Xin Yan, D. Herrin, Nikhil Ghaisas

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引用次数: 0

摘要

采用逆方法对辐射噪声源进行表征。现场声压测量用于重建振动结构表面的振动。这种逆计算的基函数是膜模态。这些模态是通过假设振动结构周围有稀薄的空气包络来计算的。利用该空气包层计算声模态，然后假设声模态振型为结构模态。虽然不是实际的结构模态，但这些模态易于计算并形成方便的基函数。通过两个示例演示了该过程。第一个是小型电动机，第二个是发电机组。结果表明，该方法可以准确地表征某声源的声辐射。

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Source Characterization using Inverse Numerical Acoustics based on Pellicular Modes

An inverse method is used to characterize radiating noise sources. Measurements of the sound pressure in the field are used to reconstruct the vibration on the surface of a vibrating structure. The basis functions for this inverse calculation are pellicular modes. These modes are calculated by assuming that there is a thin air envelope around the vibrating structure. The acoustic modes are calculated using this air envelope and the acoustic mode shapes are then assumed to be structural modes. Though not the actual structural modes, these modes are easily calculated and form convenient basis functions. This procedure is demonstrated on two examples. The first is a small electric motor and the second is a generator set. It is demonstrated that the procedure can be used to accurately characterize the sound radiation from a source.

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来源期刊

Noise & Health AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY-PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

CiteScore

2.10

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Noise and Health is the only International Journal devoted to research on all aspects of noise and its effects on human health. An inter-disciplinary journal for all professions concerned with auditory and non-auditory effects of occupational, environmental, and leisure noise. It aims to provide a forum for presentation of novel research material on a broad range of topics associated with noise pollution, its control and its detrimental effects on hearing and health. It will cover issues from basic experimental science through clinical evaluation and management, technical aspects of noise reduction systems and solutions to environmental issues relating to social and public health policy.