High Power Laser and Particle Beams, Volume. 37, Issue 1, 013001(2025)

Simulation of dynamic electromagnetic characteristics of electromagnetic railgun based on COMSOL moving mesh

Linbo Yan1, Xinbo He1,2、*, Bing Wei1,2, Qian Yang1,2, and Linqian Li1,2
Author Affiliations
  • 1School of Physics, Xidian University, Xi’an 710071, China
  • 2Key Laboratory of Optoelectronic Information Perception in Complex Environments of the Ministry of Education, Xi’an 710071, China
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    Figures & Tables(13)
    Working principle of railgun
    Diagram of sliding mesh and dynamic mesh
    All divided into fine meshs
    All are coarse mesh divisions
    Coarse track mesh and fine armature mesh
    Schematic diagram of pulse excitation current distribution
    Armature velocity changes with time under the action of rectangular pulse current
    Armature velocity vs time under Gaussian pulse current
    Diagram of current density at the center of the armature with different meshing methods
    • Table 1. Model parameters of electromagnetic railgun

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      Table 1. Model parameters of electromagnetic railgun

      track length/mmtrack width/mmtrack thickness/mmcenter to center spacing/mmorbital conductivity/(S·m−1)armature length/mmarmature width/mmarmature conductivity/(S·m−1)
      900402050$ 5.998 \times {10^7} $5030$ 3.774 \times {10^7} $
    • Table 2. Parameter values of armature model

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      Table 2. Parameter values of armature model

      average height of the rough surface $ {\sigma _{{\mathrm{asp}}}} $/μmaverage slope of the rough surface $ {m_{{\mathrm{asp}}}} $/μmmicrohardness of solids $ {H_{\mathrm{c}}} $/Pacoefficient of friction $ \;{ \mu _{\mathrm{f}}} $viscous coefficient of friction $ {C_{\mathrm{f}}} $rectangular pulse current intensity $ {I_0} $/MA
      10.4$3 \times {10^9}$0.110.030.7
    • Table 3. Mesh information divided by three different static meshing methods

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      Table 3. Mesh information divided by three different static meshing methods

      mesh informationdomain units numberboundary elements numberedge elements numbermaximum mesh size/mmminimum mesh size/mm
      mesh①575001717219739016.2
      mesh②935392797664279180.18
      mesh③326996554745206900.18
      mesh④372512535544254900.18
    • Table 4. Calculation time under different grid partitioning methods and excitation currents

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      Table 4. Calculation time under different grid partitioning methods and excitation currents

      calculation time/s
      rectangular pulse currentGaussian pulse current
      mesh①24913907
      mesh②5927778209
      mesh③860212611
      mesh④1111315507
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    Linbo Yan, Xinbo He, Bing Wei, Qian Yang, Linqian Li. Simulation of dynamic electromagnetic characteristics of electromagnetic railgun based on COMSOL moving mesh[J]. High Power Laser and Particle Beams, 2025, 37(1): 013001

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    Paper Information

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    Received: Aug. 2, 2024

    Accepted: Dec. 3, 2024

    Published Online: Feb. 21, 2025

    The Author Email: Xinbo He (hexinbo@xidian.edu.cn)

    DOI:10.11884/HPLPB202537.240243

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