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超磁致伸缩执行器全耦合非线性动态有限元模型

, PP. 123-126

Keywords: 超磁致伸缩执行器,涡流,磁滞损失,动态有限元模型,耦合

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Abstract:

超磁致伸缩执行器在高频率下工作时,能量损失不仅包括磁滞损失、Terfenol-D棒涡流损失,还包括执行器导磁回路的附加涡流损失,同时执行器上存在磁场、电场、温度场及机械应力场四场之间的耦合。本文考虑超磁致伸缩执行器Terfenol-D棒质量、预压应力、偏置磁场、磁滞和涡流损失,从电场、磁场和机械应力场三场耦合角度,建立超磁致伸缩执行器三维非线性动态有限元模型。超磁致伸缩材料磁滞特性由Berqvist和Engdahl磁滞模型来描述。应用FEMLAB建模分析并与实验结果对比,发现模型与实验结果吻合较好,验证了所建立三维动态FEM模型的正确性。

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