针对复杂的交变载荷，采用运动强化模型反映塑性应变引起的各向异性和包辛格效应。
The (aeolotropism) and Bauschinger effect resulted from plastic deformation under cyclic loading were reflected by the kinematic hardening model in the SFEM.
实验表明，该模型在交变磁场的作用下，微执行器将做高频率划动，使水下微机器人模型能够在水中产生运动。
Through these experiments, we find that the micro actuators vibrate in high frequency under the action of the alternating magnetic field, which make the micro robot model move forward in the water.
通过动力电缆给井下直线电机供电后产生交变磁场，永磁体动子在交变磁场作用下带动泵柱塞上下往复运动，从而达到举升抽油的目的。
Under the action of variation magnetic field, the permanent magnet moving-coil drives the plunger pump to move up and down and lift oil up to ground.
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