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基于CRITIC-灰色关联分析的强力旋压多目标优化
Multi-objective optimization of powerful spinning based on critical-grey correlation analysis
2025-04-14 15:40
摘 要：为提高固体火箭发动机旋压壳体强力旋压成形质量，将CRITIC客观赋权法与灰色关联分析相接合，提出CRITIC-灰色关联分析综合评价体系。选定工作角、旋轮直径、工作圆弧半径、进给比、轴向错距、芯模转速作为工艺参数变量，以实际壁厚、残余应变、残余应力为综合优化目标，运用ABAQUS软件进行数值模拟分析。设计6因素5水平的L(25)(56)正交试验，利用CRITIC法对评价指标权重进行客观赋值，将多目标灰色关联分析优化转化为单目标优化问题，最后获得最优强力旋压工艺参数。结果表明：通过CRITIC-灰色关联分析多目标优化，30Cr3旋压壳体优化后的实际壁厚为1.738mm，比正交最优序列降低8.67%；残余应变为1.204mm，与正交最优序列基本一致；残余应力为671.643MPa，比正交最优序列降低18.18%，旋压壳体成形质量更优。
Abstract: To improve the quality of the strong spinning forming of solid rocket engine casings, the CRITIC objective weighting method is combined with gray relational analysis to propose a comprehensive evaluation system of CRITIC-gray relational analysis. The working Angle, rotor diameter, working arc radius, feed ratio, axial deviation and mandrel speed were selected as the process parameters. The actual wall thickness, residual strain and residual stress were taken as the comprehensive optimization objectives, and numerical simulation analysis was carried out by ABAQUS software. L(25)(56) orthogonal test with 6 factors and 5 levels is designed, the CRITIC method is used to objectively assign the weight of evaluation indicators, the multi-objective grey correlation analysis optimization is transformed into a single objective optimization problem, and finally the optimal power spinning process parameters are obtained. The results show that the optimized wall thickness of 30Cr3 spinning shell is 1.738mm, which is 8.67% lower than that of the orthogonal optimal sequence by multi-objective optimization of CRITIC and grey correlation analysis. The residual strain is 1.204mm, which is basically consistent with the orthogonal optimal sequence. The residual stress is 671.643MPa, which is 18.18% lower than the optimal orthogonal sequence, and the forming quality of the spinning shell is better.
来源：数字仿真论坛
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