Volume 37 Issue 6
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ZHOU Xuewen, ZHAO Xiangwei, YANG Zhen, FAN Kun. Numerical analysis of dynamic characteristics of monorail rocket sled on rail[J]. Journal of Aerospace Power, 2022, 37(6): 1327-1335. doi: 10.13224/j.cnki.jasp.20210254
Citation: ZHOU Xuewen, ZHAO Xiangwei, YANG Zhen, FAN Kun. Numerical analysis of dynamic characteristics of monorail rocket sled on rail[J]. Journal of Aerospace Power, 2022, 37(6): 1327-1335. doi: 10.13224/j.cnki.jasp.20210254
shu

Numerical analysis of dynamic characteristics of monorail rocket sled on rail

doi: 10.13224/j.cnki.jasp.20210254
  • 1.

    School of Mechanical Engineering，Xi'an Jiaotong University，Xi'an 710049，China

  • 2.

    Norinco Group Test and Measuring Academy，China North Industries Group Corporation Limited，Huayin Shaanxi 714200，China

  • Received Date: 2021-05-20
  • Publish Date: 2022-06-28
    Abstract
  • To systematically analyze the dynamic characteristics of rocket sled travelling along rail，the three-dimensional Eluer-Bernouli beam elements were used to discretize the rocket sled system，and the nonlinear contact force model of the slipper-rail considering rail irregularity and slipper wear was established by reconstructing the long-range irregularity rail，and finally，the nonlinear dynamics equations was solved by Newmark-β combined with Newton-Raphson local iteration method to obtain the numerical solution of dynamic characteristics on rocket sled. Though experimental verification，the results showed that the peak value of the vertical overload to the mass of rocket sled was about 2 700g at Mach number of 2 speed；the duty cycle of rocket sled on rail was proportional to forward speed，and the vertical duty cycle of rocket sled was 16% at Mach number of 2 speed；the wear of slippers in high speed section accounted for 84% of the total trajectory wear，and the single contact wear of slipper-rail was proportional to the third power of the forward speed.

     

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