Magneto-elastic-plastic dynamic responses and instability of beam-plate excited by magnetic pulse

作者：Gao Yuan Wen^*; Qi Fa Qiang

来源：Journal of Vibration Engineering, 2007, 20(1): 61-65.

• Dynamic instability
• Ferromagnetic beam plate
• Magnetic pulse
• Residual configuration

The magneto-elastic-plastic dynamic responses and the dynamic instability of a ferromagnetic beam-plate under some magnetic pulses have been studied. Based on the sandwich beam model for elastic-plastic analyses and Gerlerkin';s method, the magneto-elastic-plastic dynamic governing equations of the ferromagnetic beam-plate with unmovable simple supports are derived. Four types of magnetic pulse with rectangular, triangular, sawtooth and sinusoidal shapes are taken into account and under which, some characteristic curves, such as dynamics response, dynamic instability and residual configuration of ferromagnetic beam-plate are displayed. The numerical results indicate that the dynamic instability is strongly dependent on the amplitude, shape and duration of the pulse field. The critical magnetic field of pulse magnetic with rectangular shape is the smallest and that for the case of sinusoidal shape is the largest.

• 出版日期2007