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基于振速测量的HELS方法研究

DOI: doi:10.3969/j.issn.1006-7043.2011.05.014

Keywords: Helmholtz方程最小二乘法, 平面近场声全息, 法向质点振速, 水下噪声源识别

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Abstract:

为了提高重建声场中质点振速量的重建精度,在传统基于声压测量的Helmholtz方程最小二乘(HELS)方法理论基础上,推导得到了基于振速测量HELS声场重建的测量模型,简称振速模型.给出了该模型的声场重建算法和参数选取的基本原则,并对基于振速模型的声场重建和声压模型的声场重建进行仿真计算比较结果表明,新模型较传统模型的声场重建精度更高,有较强的抗噪声能力且能够更准确的识别定位声源,尤其是对振速量重建具有更明显的优势.试验研究中,通过选取不同工况进一步证明了振速模型重建声场中振速量的优越性,显示了其在工程实践中广泛的应用前景.

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