超磁致伸缩复合棒换能器研究

Design of a giant magnetostrictive tonpilz transducer

针对使用稀土超磁致伸缩材料作为激励元件的稀土换能器,系统研究了磁路结构与磁场分布的具体关系。通过磁路优化研究,提出了一种改进的磁路结构,设计了一种超磁致伸缩复合棒换能器。利用纵向振动和前盖板弯曲振动的两个模态的耦合,实现了频带的拓宽,在单个换能器上实现了大功率、小尺寸、宽带的工作性能。

The relationship between the structure of the magnetic circuit and the distribution of the magnetic field is studied for the rare-earth transducer that uses the rare-earth giant magnetostrictive materials as its excitation element. An improved structure of the magnetic circuit is presented and a giant magnetostrictive tonpilz transducer is designed through the optimized study of the magnetic circuit. The high power, small size and broad bandwidth for the single transducer as well as the broadening of the frequency band are realized through the two-mode coupling of the longitudinal vibration and the bending vibration of the front shroud.