用一维理论分析了由n个元件组成的压电换能器,用传输矩阵方法编程计算了换能器两端面的位移振幅比为最大时的最佳长度比,并作实验验证。实验和理论计算结果基本符合。 The piezoelectric transducers composed of n elements were analyzed by one-dimensional theory. The optimum length ratio at the maximum displacement amplitude ratio of two end faces of the transducer was calculated by transfer matrix method and verified by experiments. The experimental and theoretical calculations are basically consistent.