现代防御技术 ›› 2024, Vol. 52 ›› Issue (1): 139-146.DOI: 10.3969/j.issn.1009-086x.2024.01.018

• 仿真技术 • 上一篇    下一篇

基于ABAQUS的固体火箭发动机壳体外压屈曲分析

耿发贵1(), 安自朝2, 何坤1, 康健1, 张鹏坤1, 刘腾跃1, 肖航1   

  1. 1.四川航天系统工程研究所,四川 成都 610000
    2.某部驻成都地区第三军事代表室,四川 成都 610041
  • 收稿日期:2022-11-25 修回日期:2023-04-10 出版日期:2024-02-28 发布日期:2024-02-21
  • 作者简介:耿发贵(1995-),男,云南曲靖人。工程师,硕士,研究方向为固体火箭发动机。 E-mail:gengfagui_dut@126.com

Buckling Analysis of Solid Rocket Motor Shell under External Pressure Based on ABAQUS

Fagui GENG1(), Zichao An2, Kun HE1, Jian KANG1, Pengkun ZHANG1, Tengyue LIU1, Hang XIAO1   

  1. 1.Sichuan Institute of Aerospace Systems Engineering, Chengdu 610000, China
    2.The Third Military Representative Office in Chengdu, Chengdu 610041, China
  • Received:2022-11-25 Revised:2023-04-10 Online:2024-02-28 Published:2024-02-21

摘要:

利用有限元分析软件ABAQUS对固体火箭发动机壳体进行外压屈曲分析。通过理论公式计算结果和有限元计算结果对比,当光壳体长径比不小于8时,有限元计算结果和Mises公式计算结果的误差在2.7%范围内,验证了有限元计算方法的准确性。采用有限元计算方法分析了带不同定心部壳体的屈曲性能,可以看出:相较于增加定心部的轴向长度,增加定心部的厚度对壳体抗屈曲性能的提升更为显著;定心部位置越靠近壳体中间,壳体的抗屈曲性能越好;定心部尺寸的约束下,由中间1个定心部增加到三个定心部均布,壳体临界失稳压力增加了36.1%。

关键词: 固体火箭发动机壳体, 屈曲, 临界失稳压力, 有限元计算, ABAQUS

Abstract:

The finite element analysis software ABAQUS is used to analyze the buckling of solid rocket motor shell under external pressure. By comparing the theoretical formula calculation results with the finite element calculation results, the error between the finite element calculation results and Mises formula calculation results is within 2.7% when the length-diameter ratio of the light shell is greater than 8, which verifies the accuracy of the finite element calculation method. The buckling performance of shells with different centering parts is analyzed by finite element method. It can be seen that compared with increasing the axial length of centering parts, increasing the thickness of centering parts can improve the buckling resistance of shells more obviously. The closer the centering position is to the middle of the shell, the better the buckling resistance of the shell is. In this paper, under the size constraint of centering parts, the critical instability pressure increases by 36.1% from one centering part in the middle to three centering parts uniformly distributed.

Key words: solid rocket motor shell, buckle, critical instability pressure, finite element calculation, ABAQUS

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