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稀土铁超磁致伸缩材料具有磁致伸缩逆效应,以此为基础的加速度传感器具有过载能力强、测量范围广、能在恶劣环境下工作、寿命长等一系列优异性能,在重工业、化学等工业领域的自动化控制系统中有着广泛的应用前景。为了有效地设计和优化超磁致伸缩加速度传感器,该文根据能量变分原理,建立了超磁致伸缩材料Tb-Dy-Fe制作的加速度传感器的磁–机械强耦合模型,应用该模型采用自编有限元软件,计算了传感器空气隙中的磁感应强度和施加加速度的关系,并测试了施加加速度从20~150m/s2范围内传感器空气隙中的磁感应强度,发现计算结果与实验结果符合较好,相对误差小于9%,满足工程需要。表明建立的超磁致伸缩加速度传感器的磁–机械强耦合有限元模型是有效的,能够反映超磁致伸缩加速度传感器的输入输出关系。
Rare earth iron magnetostrictive materials with magnetostrictive inverse effect, based on the acceleration sensor with overload capability, wide measuring range, can work in harsh environments, long life and a series of excellent performance in heavy industry, chemical and other Industrial automation control system has a wide range of applications. In order to effectively design and optimize the Giant Magnetostrictive Accelerometer, a magneto-mechanical strong coupling model of the accelerometer made of the magnetostrictive material Tb-Dy-Fe is established according to the energy variational principle. The finite element software was used to calculate the relationship between the magnetic induction intensity and applied acceleration in the air gap of the sensor. The magnetic induction intensity in the air gap of the sensor with applied acceleration from 20 ~ 150m / s2 was tested. The calculated results agree well with the experimental results , The relative error is less than 9%, to meet the engineering needs. The results show that the established magnetostrictive and mechanical coupling finite element model of the giant magnetostrictive acceleration sensor is effective and can reflect the relationship between the input and the output of the giant magnetostrictive acceleration sensor.