基于Patran二次开发的星形药柱几何参数灵敏度分析

Geometric Parameters Sensitivity Analysis for Star Grain Based on Secondary Development of Patran

为了分析几何参数对星形药柱结构完整性的影响,在有限元软件MSC.Patran/Nastran平台上,用Patran的二次开发工具PCL(Patran Command Language)实现了星形药柱建模与分析的参数化。研究了星形药柱最大Von Mises应变随药型几何参数的变化规律并进行了灵敏度分析。结果表明,星形药柱肉厚、星角系数、星角数以及沟槽顶弧倒圆半径等对药柱结构完整性影响较大,药型设计时应重点关注这些参数。所提出的方法和相应结论可为固体发动机设计提供参考。

In order to analyze the effect of geometric parameters on the structural integrity of star grain,the parameterized model of star grain was constructed through PCL（Patran Command Language） on the platform of FM software MSC.Patran/Nastran. The law of maximum Von Mises strain variation with geometric parameters was studied,and the geometric parameters sensitivity was analyzed based on the parameterized model. The results show that grain web thickness,star angle coefficient,star-hole number,and the rounding radius of groove top have great effect on the structure integrity of star grain. Therefore,more attention should be paid to these parameters in motor design. The analytical method and conclusion are beneficial for designing SRM.