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Journal of Projectiles, Rockets, Missiles and Guidance >

2021 , Vol. 41 >Issue 5: 106 - 111

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2021.05.021

Rapid Structural Integrity Analysis of the Solid Propellant Grain withLarge Aspect Ratio under Extreme Conditions

  • YU Rui ,
  • ZHANG Lu ,
  • HE Jun ,
  • WU Min ,
  • TANG Chengzhi ,
  • DENG Kangqing ,
  • GUO Xiang ,
  • PANG Aimin
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  • 1 Science and Technology on Aerospace Chemical Power Laboratory, Hubei Xiangyang 441003, China
    2 Hubei Institute of Aerospace Chemical Technology, Hubei Xiangyang 441003, China

Received date: 2021-04-15

  Online published: 2025-05-30

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Abstract

The structural integrity of the solid propellant grain is of great significance to the correct working of the solid rocket motor(SRM). Large aspect ratio, high Mach, complex grain shape and extreme temperature have brought severe challenges to the structural integrity of grains. In this paper, based on ANSYS Workbench software platform, the structural integrity of the finocyl grain with a large aspect ratio (L/D >16) is analyzed by mean of viscoelastic theory. The stressstrain response of the grain subjected to the ignition pressurization loading at extreme temperature is obtained, which provides guidance for the integrity evaluation of the grain. At the same time, inorder to realize the rapid analysis of the structural integrity, the new calculating method of the stressstrain response at the key position in the grain established, and a rapid evaluation program is developed. Then the structural integrity of the grain during the high temperature(60 °C) and low temperature (40 °C) is analyzed by using the rapid evaluation program, and the results of the equivalent stress, strainand modulus of the key points of the grain are obtained. Finally, by comparing with the finite element simulation results based on the linearviscoelastic constitutive model, the results obtained by two methods are basically consistent. The rapid evaluation program greatly saves thecalculation time and shows the good applicability on the structural integrity analysis for the finocyl grain.

Key words： extreme conditions; ignition pressurization; structural integrity; assessment program; rapid analysis

Cite this article

YU Rui , ZHANG Lu , HE Jun , WU Min , TANG Chengzhi , DENG Kangqing , GUO Xiang , PANG Aimin . Rapid Structural Integrity Analysis of the Solid Propellant Grain withLarge Aspect Ratio under Extreme Conditions[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2021 , 41(5) : 106 -111 . DOI: 10.15892/j.cnki.djzdxb.2021.05.021

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