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在固体火箭发动机药柱设计过程中,装填分数较大的药柱结构完整性很难满足要求。利用PCL对商用有限元软件MSC Patran/Marc进行二次开发,建立星形药柱发动机的二维参数化有限元模型。在此基础上,采用遗传算法对星形药柱进行了形状优化,以结构完整性最优为优化目标,以装填分数为约束条件,得到了Von mises应变最小且面积装填分数不小于0.85的药柱形状。所提出的方法可方便地应用于各种固体火箭发动机装药设计。
In the process of design of solid rocket engine grain, the structural integrity of grain with large filling fraction is difficult to meet the requirements. The secondary development of the commercial finite element software MSC Patran / Marc was carried out by using PCL, and the two-dimensional parametric finite element model of the star shaped columnar engine was established. On this basis, the shape optimization of the star-shaped drugstuffs was carried out by using genetic algorithm, and the optimization of structural integrity was the optimal goal. The filling fraction was used as the constraint condition, and the medicine with the smallest Von mises strain and the area filling fraction of not less than 0.85 Column shape. The proposed method can be conveniently applied to various solid rocket motor charge designs.