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Terfenol是较理想的研制低频大功率声纳换能器的材料.具有大应变,高能量密度的特性,但设计者必须考虑涡流损耗.文献[1]中,为了提高Terfenol棒驱动的凹筒型换能器的效率,采用径向开缝的方式取代迭片结构,利用有限元方法计算了开缝数目,并作了实验测试.本文基于涡流轨迹的特征,提出了一种简便的几何计算开缝数目的方法,计算结果与文献[1]中有限元计算的结果一致.节省了设计成本.
Terfenol is an ideal material for the development of low-frequency high-power sonar transducers with large strain and high energy density, but designers must consider the eddy current loss.In literature [1], Terfenol The efficiency of the transducer, radial slit instead of lamination structure, using the finite element method to calculate the number of slits, and made an experimental test.Based on the characteristics of eddy current trajectory, a simple geometry calculation is proposed to open The number of the method, the calculation results and the literature [1] the finite element calculation results. Save the design cost.