Structural Optimum Design and Pre-stress Simulation of Fiber Housing for Railgun
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摘要: 介绍了电磁轨道炮复合身管纤维缠绕封装的结构优化设计方法。给出了∅50 mm复合身管纤维层的缠绕厚度、缠绕角、层叠次序优化结果。基于生死单元及多步连续降温，给出了缠绕增强复合身管的预应力逐层模拟方法。采用分步逐层随机搜索法，优化了纤维缠绕张力制度，详细分析了两种状态约束下的张力优化结果，并给出了对应的身管初应力场和发射叠加应力场。优化结果表明，Ⅱ型张力方案中身管复合层发射前及发射过程的应力分布满足身管预应力设计要求。Abstract: The structural optimization design of filament winding housing for a railgun barrel is introduced.The thickness of fiber laminates, the winding angle and the stacking sequence of fibers for a 50 mm circular bore composite barrel are investigated for structural optimization.Numerical simulation of railgun prestressing has been studied based on continuous solution with birth-death element method.By using a method of stepwise optimization of multi-variable based on random search, the tension profile of fibers is optimized.Optimization of state variables under two different constraints is analyzed and initial stress field and superposition stress field of the prestressed barrel are given.The second type of optimization results show that the profile in this study can meet design requirements of the composite barrel.
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Key words:
- railgun /
- composite barrel /
- random search /
- tension profile
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图 3 50 mm圆口径复合身管材料及缠绕工艺参数(1/4模型)
Figure 3. Material properties and processing parameters for 50 mm circular bore barrel (1/4 model)
图 5 两种状态约束下张力优化结果曲线
Figure 5. Optimization results of tension force under two different constraints of state variables
图 6 Ⅰ型状态约束身管发射前及发射时环向应力分布
Figure 6. Hoop stress distribution of barrel under type Ⅰ constraints before and during launch
图 8 Ⅱ型状态约束身管发射前及发射时环向应力分布
Figure 8. Hoop stress distribution of barrel under type Ⅱ constraints before and during launch
表 1 50 mm圆口径复合身管最小缠绕质量优化结果
Table 1. Optimization result of minimum fiber mass for a 50 mm circular bore composite barrel
h1/mm h2/mm h3/mm h4/mm δ/mm S fc, k(Maximum) ω/mm 5.38 14.5 6.94 5.07 0.283 1.51 0.481 1.83 
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