阵元间互辐射对基阵指向性的影响研究及试验

Research and experiments of mutual radiation impedance effect on array directivity

摘要: 针对常规基阵指向性图计算并未考虑阵元间互辐射阻抗影响这一不足,修正了常规基阵指向性图计算公式。将阵元间的互辐射阻抗引入到水声基阵的辐射声场计算中,并依据叠加原理得到包含阵元间互辐射阻抗的基阵指向性图计算修正公式。15元均匀线列阵和5×5均匀平面阵的计算机仿真和消声水池试验结果表明,该修正公式相比于常规公式更能反映基阵指向性图的真实情况。

Abstract: The conventional array directivity calculation formulation is modified for ignoring the mutual radiation impedance in array directivity calculation.The mutual radiation impedance is introduced into the calculation of array radiation sound field,and a modified array directivity calculation formulation considering the mutual radiation impedance is gained according to the superposition principle.Resultsof computer simulation and experiments for a uniform linear array and a uniform planar array show superior performance on the present of the practical directivity pattern of the modified formulation in this paper in comparison to the conventional one.