【摘要】：產(chǎn)品的設(shè)計過程是設(shè)計、分析與優(yōu)化反復迭代的過程,因此需要CAD系統(tǒng)與分析優(yōu)化系統(tǒng)的協(xié)作。基于IGES或STEP標準格式文件的協(xié)作雖然能夠支持CAD系統(tǒng)與分析優(yōu)化系統(tǒng)之間的邊界幾何信息交換,但因為無法支持參數(shù)化特征模型的交換而難以實現(xiàn)CAD系統(tǒng)與分析優(yōu)化系統(tǒng)的無縫集成以及產(chǎn)品設(shè)計過程中設(shè)計與分析優(yōu)化這一迭代過程的自動化。為了提高產(chǎn)品的設(shè)計與開發(fā)效率,本文提出了一種依據(jù)優(yōu)化后的邊界表示模型驅(qū)動原始參數(shù)化特征模型進行自動更新的方法,用以實現(xiàn)產(chǎn)品設(shè)計與分析優(yōu)化的無縫集成。本文的工作主要包括以下幾個方面：1.提出了一種實現(xiàn)CAD系統(tǒng)與分析優(yōu)化系統(tǒng)無縫集成的框架。該集成框架首先通過標準文件將分析優(yōu)化系統(tǒng)生成的優(yōu)化的邊界表示模型交換到CAD系統(tǒng)中,然后在CAD系統(tǒng)中依據(jù)優(yōu)化的邊界表示模型自動完成原始參數(shù)化特征模型的自動更新,實現(xiàn)了初始設(shè)計與分析優(yōu)化的無縫集成。2.提出了一種自動確定優(yōu)化后的邊界表示模型與原始參數(shù)化特征模型中幾何元素對應(yīng)關(guān)系的方法。該方法通過對兩個模型中的幾何元素進行幾何和拓撲相似度比較,能夠在原始參數(shù)化特征模型中準確找到與優(yōu)化后的邊界表示中的每個幾何元素相對應(yīng)的幾何元素。3.提出了一種基于幾何變動信息驅(qū)動參數(shù)化特征模型自動更新的方法。該方法通過將幾何變動信息自動轉(zhuǎn)化為參數(shù)化特征模型中的相應(yīng)尺寸變動,有效實現(xiàn)了參數(shù)化特征模型的自動更新。基于以上研究成果,通過Pro/E二次開發(fā),實現(xiàn)了一個優(yōu)化結(jié)果模型驅(qū)動的參數(shù)化模型自動更新系統(tǒng)。實驗結(jié)果表明,本文提出的方法能夠依據(jù)分析優(yōu)化系統(tǒng)生成的邊界表示模型,在CAD系統(tǒng)中有效完成原始參數(shù)化模型的自動更新,從而有效支持初始設(shè)計與分析優(yōu)化的無縫集成。
[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.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TP391.72;TB472

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本文編號：2212969