Finite Element Simulation Model for Electromagnetic Buffer under Intensive Impact Load

doi:10.3969/j.issn.1000-1093.2021.05.003

Abstract

Abstract: In order to obtain the electromagnetic and damping characteristics of the electromagnetic buffer under intensive impact load, an improved exponential demagnetization model is proposed to simulate the demagnetization process of NdFeB permanent magnets. An improved vector hysteresis model is adopted to consider the hysteresis effect of soft magnetic materials. And a primary-secondary eddy current coupled time-step finite element model is established, in which demagnetization and hysteresis are considered. The accuracy of the finite element model is verified through the laboratory impact load test. The damping and electromagnetic characteristics were obtained and analyzed through the magnetic field test. The intensive impact test was carried out to obtain the damping characteristics of electromagnetic buffer under high buffering velocity conditions. The results show that the finite element model has high reliability. The demagnetization effect increases with the increase in buffering velocity, which leads to the decreased damping coefficient. Hysteresis effect can disturb the magnetic field distribution and affect the damping force.

Key words: electromagneticbuffer, intensiveimpactload, exponentialdemagnetizationmodel, vectormagnetichysteresis

CLC Number:

TJ303⁺.4

LI Zixuan， YANG Guolai， LIU Ning. Finite Element Simulation Model for Electromagnetic Buffer under Intensive Impact Load[J]. Acta Armamentarii, 2021, 42(5): 913-923.

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