基于ABAQUS的固体火箭发动机壳体外压屈曲分析  

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

作　　者：耿发贵 安自朝 何坤 康健 张鹏坤 刘腾跃 肖航 GENG Fagui;An Zichao;HE Kun;KANG Jian;ZHANG Pengkun;LIU Tengyue;XIAO Hang(Sichuan Institute of Aerospace Systems Engineering,Chengdu 610000,China;The Third Military Representative Office in Chengdu,Chengdu 610041,China)

机构地区：[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

出　　处：《现代防御技术》2024年第1期139-146,共8页Modern Defence Technology

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%。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.

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 

分 类 号：V19[航空宇航科学与技术—人机与环境工程] TJ76[兵器科学与技术—武器系统与运用工程]