Smart Structures and Systems

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Electromechanical coupled nonlinear dynamics of euler beam rails for electromagnetic railgun

  • Xu, Lizhong (Mechanical engineering institute, Yanshan University) ;
  • Wu, Dewen (Mechanical engineering institute, Yanshan University)
  • Received : 2016.04.17
  • Accepted : 2016.11.18
  • Published : 2017.02.25
⟨ Previous Next ⟩

Abstract

The electromagnetic field can cause an essential change of the dynamic behavior of the railgun. The evaluation of the dynamics performance of railgun is a mandatory task. Here, a nonlinear electromagnetic force equation of the railgun is given in which the clearance, the thickness and the width of the rail are considered. Based on it, the nonlinear electromechanical coupled dynamics equations of Euler beam rails for the railgun are proposed. Using the equations, the nonlinear free vibration frequency of the railgun is investigated and the effects of the system parameters on the frequency are analyzed. The nonlinear forced responses of the rail to the electromagnetic excitation are investigated as well. The results show that as the nonlinearity of the railgun system is considered, the vibration frequencies of the railgun system increase; as the current in the rail increases, the difference between the natural frequencies and the nonlinear vibration frequencies increases significantly; the nonlinearity of the railgun system is more obvious for smaller distance between the two rails, smaller rail thickness, and smaller stiffness of the elastic foundation; the unstable dynamics state of the rail system occurs when the armature runs to the exit of the railgun. The results are useful for design and application of the railgun system.

Keywords

Acknowledgement

Supported by : Education Ministry of China

References

  1. Fair, H. (2007), "Progress in electromagnetic launch science and technology", IEEE T. Magnetics, 43(1), 93-98. https://doi.org/10.1109/TMAG.2006.887596
  2. Fryba, L. (1977), Vibration of Solids and Structures under Moving Loads, Gronningen, The Netherlands: Noordhoff.
  3. Geng, Y. (2013), "Electromechanical coupled dynamics of rails for electromagnetic launcher", Int. J. Appl. Electrom. Mech., 42(3), 369-389.
  4. He, W. and Bai, X. (2013), "Dynamic responses of rails and panels of rectangular electromagnetic rail launcher", J. Vib. Shock, 32(15), 144-148 (in China).
  5. Johnson, A. and Moon, F. (2006), "Elastic waves and solid armature contact pressure in electromagnetic launchers", IEEE T. Magnetics, 42(3), 422-429. https://doi.org/10.1109/TMAG.2005.862105
  6. Johnson, A. and Moon, F. (2007), "Elastic waves in electromagnetic launchers", IEEE T. Magnetics, 43(1), 141-144. https://doi.org/10.1109/TMAG.2006.887443
  7. Lehmann, P., Peter, H. and Wey, J. (2001), "First experimental results with the ISL 10-MJ-DES railgun PEGASUS", IEEE T. Magnetics, 37(1), 435-439. https://doi.org/10.1109/20.911871
  8. Nechitailo, N. and Lewis, B. (2006), "Critical velocity for rails in hypervelocity launchers", Int. J. Impact Eng., 33(1-12), 485-495. https://doi.org/10.1016/j.ijimpeng.2006.09.077
  9. Pai, P.F. and Kaufman, C.A. (2012), "Characteristic speeds and influences of cross-sectional warpings on high-speed beamfoundation structures", Int. J. Mech. Sci., 59(1), 8-21. https://doi.org/10.1016/j.ijmecsci.2012.01.011
  10. Schuppler, C., Tumonis, L., Kacianauskas, R. and Schneider, M. (2013), "Experimental and numerical investigations of vibrations at a railgun with discrete supports", IEEE T. Plasma Sci., 41(5), 1508-1513. https://doi.org/10.1109/TPS.2013.2243920
  11. Shvetsov, G., Rutberg, P. and Budin, A. (2007), "Overview of some recent EML research in Russia", IEEE T. Magnetics, 43(1), 99-106. https://doi.org/10.1109/TMAG.2006.887597
  12. Tumonis, L., Schneider, M., Kaeianauskas, R. and Kaeeniauskas, A. (2009), "Structural mechanics of railguns in the case of discrete supports," IEEE T. Magnetics, 45(1), 474-479. https://doi.org/10.1109/TMAG.2008.2008534
  13. Tzeng, J. (2003), "Dynamic response of electromagnetic railgun due to projectile movement", IEEE T. Magnetics, 39(1), 472-475. https://doi.org/10.1109/TMAG.2002.806384
  14. Tzeng, J. and Sun, W. (2007), "Dynamic responce of cantilevered rail guns attributed to projectile/gun interaction - theory". IEEE T. Magnetics, 43(1), 207-213. https://doi.org/10.1109/TMAG.2006.887444
  15. Xu, L. and Geng, Y. (2012), "Dynamics of rails for electromagnetic railguns", Int. J. Appl. Electrom.Mech., 38(1), 47-64.
  16. Xu, L., Zheng, F. and Peng, L. (2015), "Electromechanical coupled nonlinear free vibration of rails for electromagnetic railguns", Int. J. Appl. Electrom. Mech., 47(2), 313-322.

Cited by

  1. Relating a Small-Scale Experiment to a Full-Scale Railgun Using Simulation and Similarity Theory vol.65, pp.12, 2018, https://doi.org/10.1109/TIE.2018.2826453
  2. Electromechanical coupled chaotic vibration for electromagnetic railgun vol.56, pp.4, 2018, https://doi.org/10.3233/jae-160142