HyperWorks发射系统底架结构优化及几何体重构
时间:2018-03-05 10:35 来源:毕业论文 作者:毕业论文 点击:次
| 摘要在HyperWorks结构优化的基础上，以某现有在研火箭炮底架为研究对象，了解结构优化设计的基本思想和方法。主要针对结构拓扑优化设计过程进行分析研究，并给出HyperWorks优化结果文件的属性及其特点，以便更加深入了解其优化程序的运行过程。同时，在得到优化结果的情况下，将其导出HyperWorks进行进一步的分析。然而，由于优化结果是以某些约束条件为前提进行计算的结果，所以优化之后的表面是十分复杂的曲面，导出之后的模型是由大量片体连结的，且片体之间不是无缝连结，都有或多或少的缝隙和缺陷。为解决此问题，需在原有优化结果的基础上进行结构的重新设计。本文主要论述的即是结构优化技术和几何体重构方法。19210 关键词 火箭炮底架 结构优化 拓扑优化 几何体重构 毕业论文设计说明书（论文）外文摘要 Title Launch system chassis structure optimization and geometry reconstruction Abstract On the basis of structural optimization in HyperWorks, we do a research for study with a rocket chassis and analyses the basic methods of the design of structural optimization. This article mainly analyses and studies the process of structural topology optimization, and works out the attributes and characteristics of optimization results file, in order to understand the process of running its optimization program more deeply. At the same time, in the case of the optimization results obtained, we need export the result for further analysis. However, due to that the optimization results are established on some constraints to calculate, the surfaces after optimization are extremely complex. Additionally,the model exported from HyperWorks is linked by a large number of Sheet bodies that are not seamless linked, so there are more or less cracks and defects. To solve this problem, we need to re-design the structure on the original optimization results. To sum up, this article mainly discusses the structural optimization techniques and the method of geometry reconstruction. Keywords rocket chassis, structural optimization, topology optimization, geometry reconstruction 目录 1 绪论 2 1.1 研究背景 2 1.2 研究目的和意义 3 1.3 国内外研究现状及发展情况 4 1.4 本文主要研究内容 5 2 有限元法及基本思想 5 3 结构优化设计理论基础 8 3.1 优化设计基本构成 9 3.2 OptiStuct迭代算法 10 3.3 灵敏度分析 11 3.4 近似模型拟合 11 4 Altair OptiStruct 结构优化技术 12 4.1 拓扑优化 12 4.2 形貌优化 13 4.3 尺寸优化 13 4.4 形状优化 13 5 优化结果属性及特点 13 5.1 OptiStruct优化的过程 14 5.2 优化结果文件类型 14 5.3 火箭炮底架的优化结果属性 16 6 几何体重构 27 6.1 软件导入导出 27 6.2 结构重构 35 结 论 42 致 谢 44 参考文献 45 1 绪论 (责任编辑：qin) |