优化结果模型驱动的参数化模型自动更新

发布时间：2018-08-30 11:45

【摘要】：产品的设计过程是设计、分析与优化反复迭代的过程,因此需要CAD系统与分析优化系统的协作。基于IGES或STEP标准格式文件的协作虽然能够支持CAD系统与分析优化系统之间的边界几何信息交换,但因为无法支持参数化特征模型的交换而难以实现CAD系统与分析优化系统的无缝集成以及产品设计过程中设计与分析优化这一迭代过程的自动化。为了提高产品的设计与开发效率,本文提出了一种依据优化后的边界表示模型驱动原始参数化特征模型进行自动更新的方法,用以实现产品设计与分析优化的无缝集成。本文的工作主要包括以下几个方面：1.提出了一种实现CAD系统与分析优化系统无缝集成的框架。该集成框架首先通过标准文件将分析优化系统生成的优化的边界表示模型交换到CAD系统中,然后在CAD系统中依据优化的边界表示模型自动完成原始参数化特征模型的自动更新,实现了初始设计与分析优化的无缝集成。2.提出了一种自动确定优化后的边界表示模型与原始参数化特征模型中几何元素对应关系的方法。该方法通过对两个模型中的几何元素进行几何和拓扑相似度比较,能够在原始参数化特征模型中准确找到与优化后的边界表示中的每个几何元素相对应的几何元素。3.提出了一种基于几何变动信息驱动参数化特征模型自动更新的方法。该方法通过将几何变动信息自动转化为参数化特征模型中的相应尺寸变动,有效实现了参数化特征模型的自动更新。基于以上研究成果,通过Pro/E二次开发,实现了一个优化结果模型驱动的参数化模型自动更新系统。实验结果表明,本文提出的方法能够依据分析优化系统生成的边界表示模型,在CAD系统中有效完成原始参数化模型的自动更新,从而有效支持初始设计与分析优化的无缝集成。
[Abstract]:The process of product design is iterative process of design, analysis and optimization, so the cooperation between CAD system and analytical optimization system is needed. Although collaboration based on IGES or STEP standard format files can support the exchange of boundary geometric information between CAD systems and analytical optimization systems, However, it is difficult to realize the seamless integration of CAD system and analytical optimization system because of its inability to support the exchange of parameterized feature models, and to automate the iterative process of design and analysis optimization in the process of product design. In order to improve the efficiency of product design and development, this paper proposes a method to automatically update the original parameterized feature model based on the optimized boundary representation model, so as to realize the seamless integration of product design and analysis optimization. The work of this paper mainly includes the following aspects: 1. A framework for seamless integration of CAD system and analytical optimization system is proposed. The integrated framework first exchanges the optimized boundary representation model generated by the analysis optimization system into the CAD system through the standard file, and then automatically updates the original parametric feature model based on the optimized boundary representation model in the CAD system. The seamless integration of initial design and analysis optimization. 2. A method of automatically determining the corresponding relationship between the optimized boundary representation model and the original parameterized feature model is presented. By comparing the geometric and topological similarity of the geometric elements in the two models, the method can accurately find the geometric elements corresponding to each geometric element in the optimized boundary representation in the original parameterized feature model. This paper presents an automatic updating method of parameterized feature model based on geometric change information. In this method, the geometric change information is automatically transformed into the corresponding dimension change in the parameterized feature model, and the automatic updating of the parameterized feature model is realized effectively. Based on the above research results, a parameterized model updating system driven by the optimized result model is realized through the secondary development of Pro/E. The experimental results show that the proposed method can effectively complete the automatic updating of the original parameterized model in CAD system according to the boundary representation model generated by the analytical optimization system, thus effectively supporting the seamless integration of initial design and analysis optimization.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.72;TB472

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