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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 whether a cylindrical acoustic array with high spatial transparency has good acoustic transparency, a model of primary scattering between cylindrical elements is established. For a single array element on a cylindrical array, the total sound field received Sound pressure characteristics of the theoretical derivation and analysis of the total sound pressure, including direct sound waves in the field and from the various elements of the scattered waves.The theoretical simulation results show that: space transparent cylindrical acoustic transparency has obvious limitations, especially It is obvious that the amplitudes of sound pressure received by the array element fluctuate in the horizontal plane and the degree of this fluctuation is still very serious in the low frequency band.The data of the lake test agree well with the theoretical analysis to prove the accuracy of the theoretical analysis model and the method This method is of great value to the study of acoustic transparency of other spatial arrays, and the results show that it is necessary to measure the array manifold and compensate the errors when the array is processed with high gain signal.