基于正交设计的柱锥结合药型罩多参数结构优化

Multi-parameter structural optimization of cylindrical cone linerbased on orthogonal design

为了改善柱锥结合药型罩形成的射流稳定性较差,侵彻能力有待提高的问题,通过正交优化设计,改变柱型药型罩材料、柱型药型罩高度h以及柱型药型罩顶部厚度b,研究柱锥结合药型罩射流成型的断裂前头部速度、断裂时间、有效长度综合的最优方案组合。选取L25(56)正交优化表,通过AUTODYN软件进行数值仿真,得到了3个因素对3个指标影响程度的主次顺序。结果表明:射流断裂前头部速度的影响因素依次为:柱型药型罩高度、材料、顶部厚度;射流断裂时间的影响因素:柱型药型罩的材料和高度相同,其次为顶部厚度;射流有效长度的影响因素依次为:柱型药型罩的材料、高度、顶部厚度;综合分析,得到方案A:NICKEL,h=10 mm,b=1.5 mm,方案B:NICKEL,h=10 mm,b=2 mm形成的射流整体效果较好。

In order to improve the stability of the jet formed by cylindrical-cone liner,the penetration ability needs to be improved by changing the material of cylindrical liner,the height of cylindrical liner and the top thickness of cylindrical liner were changed by orthogonal optimization design.The optimal scheme combination of the head velocity before fracture,the fracture time and the effective length of the jet forming of cylindrical-cone liner was discussed by selecting L 25(56)orthogonal optimization table to carry on numerical simulation through AUTODYN software.The primary and secondary order of the influence degree of three factors on three indexes are obtained.The results show that the influencing factors of the head velocity before jet fracture are as follows:the height of cylindrical liner,the thickness of the top of material;Influencing factors of jet rupture time:the material and height of cylindrical liner are the same,followed by the top thickness;The influencing factors of effective length of jet are as follows:material height and top thickness of cylindrical liner;Comprehensive analysis shows that scheme A(NICKEL,h=10 mm,b=1.5 mm)and scheme B(NICKEL,h=10 mm,b=2 mm)form a better overall jet.