中文摘要：

针对水声基阵阵元间存在互辐射阻抗的情况，研究了互辐射阻抗对基阵加权指向性的影响。以互辐射阻抗的形成机理为出发点，将互辐射阻抗引入基阵辐射声场的计算中，修正了基阵加权指向性函数的计算公式，并以超指向性加权为例，进行了计算机仿真与消声水池实验。仿真与实验结果表明：在阵元间距较小、低频时互辐射阻抗会严重影响基阵的加权指向性，所提的修正指向性函数更能反映基阵指向性的真实情况。

英文摘要：

The effect on directivity of weighted array is investigated for the existence of mutual radiation impedance between underwater acoustic array elements. Based on the acoustic theory the mutual radiation impedance is introduced into the calculation of array radiation sound field, the weighted directivity function is modified, and then computer simulations and anechoic tank experiments are carried out for super directivity array. The results of computer simulations and anechoic tank experiments show that the array directivity is significantly affected at low working frequency in small array distance and the modified directivity function agree with the practical situation better in comparison to the conventional one.