中文摘要：

在由由圆螺线卷和垂直偏爱磁场组成的一个电磁的声学的变换器的非铁磁性的铝以内的散发的健全的域激发的特征是 studied.This 文章根据健全的地的分析排水量解决方案由那个力量来源模型生产了的电磁的 induction.Then 的原则介绍一个改进力量来源模型是 deduced.The 正切、正常的择向性砍并且纵的声音被计算 nume

英文摘要：

The characteristic of radiated sound field excitated within a non-ferromagnetic aluminum by an electromagnetic acoustic transducer consisting of circle-spiral coil and vertical bias magnetic field is studied. This article presents an improved force source model according to the principle of electromagnetic induction. Then the analytic displacement solution of sound field produced by that force source model is deduced. The tangential and normal directivities of shear and longitudinal sounds are calculated numerically and compared with experimental results. Experimental results conform well to the theoretical prediction, which not only shows that the electromagnetic acoustic transducer of this conformation has a good directivity of vertical shear-wave radiation, but also confirms the given force source model is effective to describe the actual physical behavior of the probe. Theoretical and experimental study lays a foundation for optimization design and engineering application of the electromagnetic acoustic probe.