摘要
为了分析具有较高空间透明性的圆柱型声基阵是否具有较好的声透明性,建立了圆柱阵阵元间一次散射的模型,对圆柱阵上的单路阵元所接收到的声场总声压的特性进行了理论推导和分析,总声压包含声场中的直达波和来自各路阵元的散射波.理论仿真结果表明:空间透明圆柱阵的声透明性具有明显的局限性,特别是阵元接收声压的幅值在水平面内起伏明显,并且这种起伏的程度在很低的频段依然比较严重.湖试数据和理论分析结果吻合较好,证明理论分析模型和方法的准确性.该分析方法对于研究其他空间基阵的声透明性具有借鉴意义,研究结果证实了在对基阵进行高增益信号处理时,测量基阵阵列流形并进行补偿修正是十分必要的.
In order to analyze if the cylindrical transducer array utilizing a high level transparency in structure has a better acoustic transparency,a model was constructed based on the first scattering of sound between elements of cylindrical array.The received total sound pressure for a typical single-element installed on a cylindrical array,included not only the direct sound wave but also scattering waves from each element,and then was studied by conducting derivation and theoretical analysis.Simulation results show that although the cylindrical array was fully transparent in spatial structure,its acoustic transparency was still limited,especially for the amplitude of the sound pressure received by elements installed on a cylindrical array.The amplitude altered distinctly in the horizontal plane,and the amplitude of such undulation still kept considerably.The measured data for the experiment on the lake agreed well with the results of the theoretical analysis,and verified that the model and the method used for the analysis were accurate.The analysis method was also useful for the study of acoustic transparency for other spatial arrays,and the research results confirmed that it is necessary for measuring the array manifold and making necessary compensatory correction of the transducer array before processing the supergain signal.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2013年第4期429-433,共5页
Journal of Harbin Engineering University
关键词
圆柱阵
圆柱阵阵元
声透明性
声散射
声压相位
声压幅度
cylindrical array
array element
acoustic transparency
acoustic scattering
sound pressure phase
sound pressure amplitude
