辐射板对磁致伸缩换能器输出特性的影响

辐射板作为磁致伸缩换能器的最终输出元件,它所选用的材料、尺寸、形状将直接影响换能器的工作特性。本文在换能器工作原理的基础上,通过有限元软件ATILA模拟仿真在相同激励力、边界条件下,不同材料、尺寸、形状的辐射板对磁致伸缩换能器输出特性(频率、振动幅值、声压幅值)的影响。结果表明:硬铝材料辐射板出现活塞振型时振幅最大;增加辐射板直径D可有效增加辐射板振动幅值,同时增加辐射板辐射声压值,增加辐射板厚度H可有效增加辐射板出现活塞振型的频率值;凹球面辐射板出现活塞振型时振幅最大,对应谐振腔中声压幅值最高。以上分析结果为合理设计辐射板结构提供了参考。

The Influence of Radiation Plate on Magnetostrictive Transducer Output Characteristics

Abstract: The radiation plate as a final output element of magnetostrictive transducer, the material, size, shape of it will directly affect the operating characteristics of the transducer. Based on the principle of the transducer, this paper analyzes the influence of material, size, shape of the radiation plate on magnetostrictive transducer output characteristics (frequency, vibration amplitude, the sound pressure amplitude) under the same excitation force, boundary conditions by using ATILA software. The results showed that: Hard aluminum radiation plate can get the maximum vibration amplitude value when the piston type; increase the radiation plate diameter D can effectively increase the radiation plate vibration amplitude, while increasing the radiation plate radiating sound pressure level, Increasing the radiation plate thickness H can effectively increase the value of the radiation plate vibration frequency when the piston type; concave spherical radition plate can get the maximum amplitude by piston type make the highest sound pressure amplitude in the cavity and provide the basis for design of radition plat.