| 引用本文: | 李磊,唐国金,段静波,等.基于参数化建模的车轮形药柱形状优化.[J].国防科技大学学报,2011,33(1):11-16.[点击复制] |
| LI Lei,TANG Guojin,DUAN Jingbo,et al.Shape Optimization of Wheel Shape Grain Based on Parameterized Modeling[J].Journal of National University of Defense Technology,2011,33(1):11-16[点击复制] |
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| 基于参数化建模的车轮形药柱形状优化 |
| 李磊, 唐国金, 段静波, 申志彬 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 固体火箭发动机装药设计过程中，较高的装填分数往往导致药柱的应力应变较大，结构完整性不易满足要求，为了解决这一问题，将参数化建模方法与遗传算法相结合，对车轮形药柱进行形状优化。采用MSC.Patran软件的二次开发工具PCL (Patran Command Language)建立车轮形药柱的参数化有限元分析模型，能够根据给定的几何参数自动建模计算并输出药柱的最大应变和装填分数，可以作为函数被遗传算法调用。对某装填分数较高的车轮形药柱进行了形状优化，在温度载荷作用下，得到了装填分数不小于初始设计且最大应变比初始设计小30%的药柱形状。结果表明，所提出的方法是可行和有效的，可方便地应用于各种固体火箭发动机装药设计。 |
| 关键词: 固体火箭发动机 车轮形药柱 形状优化 参数化建模 |
| DOI： |
| 投稿日期：2010-09-09 |
| 基金项目:国家部委资助项目 |
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| Shape Optimization of Wheel Shape Grain Based on Parameterized Modeling |
| LI Lei, TANG Guojin, DUAN Jingbo, SHEN Zhibin |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In the process of SRM (Solid Rocket Motor) grain configuration design, high loading fraction always gives rise to high stress and train in the grain, and the structure integrity of grain turns hard to satisfy. To solve this problem, the integration of GA (Genetic Algorithm) and parameterized modeling method was applied to shape the optimization of the wheel shape grain. Parameterized finite element analysis model was constructed by PCL (Patran Command Language), the secondary development tool of MSC.Patran. Based on the model, the finite element mesh could be established and the maximum strain and loading fraction of grain could be exported when the geometric parameters were given.This made it convenient for GA to call, as a function. A shape optimization of a high loading fraction wheel shape grain was carried out, and the optimal grain was found. The maximum strain of the optimal grain, under low temperature load,was 30% less than the initial grain's. Meanwhile, the loading fraction remained the same. The results show that the method presented is feasible and available,and it can be applied to SRM grain configuration design of all sorts. |
| Keywords: solid rocket motor wheel shape grain shape optimization parameterized modeling |
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