本文選題：桁架結(jié)構(gòu) + 輸電塔-線體系��； 參考：《大連理工大學》2014年博士論文

【摘要】：輸電塔-線體系作為高負荷電能的輸送載體,是一種重要的生命線工程。隨著人民生活水平的不斷提高和國家經(jīng)濟建設的快速發(fā)展,建設高聳、大跨越的輸電塔-線結(jié)構(gòu)已成為必然趨勢,特別是特高壓輸電線路工程。建設和發(fā)展既安全可靠,又經(jīng)濟合理的輸電塔結(jié)構(gòu)一直是工程界的研究熱點和難點。鑒于現(xiàn)階段國內(nèi)外輸電塔結(jié)構(gòu)優(yōu)化設計方法和理論發(fā)展的相對滯后,本文在蟻群優(yōu)化算法和有限分析方法的基礎上,提出了一套完整的輸電塔結(jié)構(gòu)優(yōu)化設計與驗算分析方法。主要研究內(nèi)容如下： (1).針對于桁架結(jié)構(gòu)拓撲和形狀優(yōu)化設計存在著設計變量類型不統(tǒng)一,耦合優(yōu)化困難等問題,本文給出了一種基于蟻群算法的桁架結(jié)構(gòu)多類型變量優(yōu)化方法。其中,拓撲優(yōu)化以結(jié)構(gòu)拓撲量和拓撲總量為基礎,將拓撲優(yōu)化問題轉(zhuǎn)化為雙TSP問題,并采用蟻群算法實現(xiàn)求解；形狀優(yōu)化則是采用加權(quán)耦合的兩級優(yōu)化方式求解此類問題,并且充分發(fā)揮了不同類型蟻群算法各自的優(yōu)勢。 (2).由于多類型變量優(yōu)化方法在處理大型復雜結(jié)構(gòu)和布局優(yōu)化問題時的計算效率過低,本文提出了一種基于蟻群算法的桁架結(jié)構(gòu)離散型變量優(yōu)化方法,包括：截面、拓撲形狀和布局優(yōu)化方法。通過對多個經(jīng)典算例的分析與對比表明：本文方法的優(yōu)化效果顯著、簡單易行,并且具有非常良好的應用前景。 (3).基于蟻群算法在單目標優(yōu)化問題中的成功應用,本文提出了一種改進的基于離散變量的多目標蟻群優(yōu)化算法。該方法是在Pareto蟻群算法的基礎上,建立“可行解”和“非可行解”集合,并通過替換優(yōu)化過程中的重復解來提高算法的計算效率。該方法不僅可以求解雙目標函數(shù)問題,而且能夠很好的求解桁架結(jié)構(gòu)多目標優(yōu)化問題。 (4).考慮到輸電塔結(jié)構(gòu)的特殊性和復雜性,以及優(yōu)化方法一致性的要求,本文歸納總結(jié)出了一種“基于蟻群算法的輸電塔結(jié)構(gòu)離散變量優(yōu)化設計方法”,并且清晰明確的闡述了不同優(yōu)化內(nèi)容的物理意義和優(yōu)化準則。通過對輸電塔結(jié)構(gòu)局部和整體多層次優(yōu)化設計結(jié)果的分析表明：該方法是一種行之有效,且簡單實用的結(jié)構(gòu)優(yōu)化設計方法。 (5).鑒于輸電塔結(jié)構(gòu)真型試驗價格昂貴、費時費力,以及有限元方法的蓬勃發(fā)展,本文采用輸電塔-線體系連續(xù)倒塌模擬方法驗算優(yōu)化設計結(jié)果的安全性與可靠性。其中,驗算方法基于ABAQUS軟件平臺,并通過采用顯式有限元方法和生死單元技術(shù)模擬輸電塔-線體系連續(xù)性倒塌的全過程。此外,針對不同輸電塔模型的倒塌情況,本文還進一步探討了輸電塔結(jié)構(gòu)的薄弱環(huán)節(jié)、倒塌形式和抗倒塌的能力。
[Abstract]:As a carrier of high load electric energy transmission tower-line system is an important lifeline project. With the continuous improvement of people's living standards and the rapid development of national economic construction, it has become an inevitable trend to build tall and large span transmission tower-line structures, especially for UHV transmission line projects. The construction and development of safe, reliable, economical and reasonable transmission tower structure has always been a hot and difficult point in the engineering field. In view of the relative lag in the development of transmission tower structure optimization methods and theories at home and abroad, a complete set of optimization design and checking calculation analysis method for transmission tower structure is proposed on the basis of ant colony optimization algorithm and finite analysis method. The main contents of the study are as follows: There is no such thing as a bird. In order to solve the problems in topology and shape optimization design of truss structures, such as the inconsistency of design variables and the difficulty of coupling optimization, a multi-type variable optimization method for truss structures based on ant colony algorithm is presented in this paper. Among them, the topology optimization is based on the structural topology quantity and the total topology amount, the topology optimization problem is transformed into a double TSP problem, and the ant colony algorithm is used to solve the problem, while the shape optimization is solved by a weighted coupling two-stage optimization method. And give full play to the advantages of different types of ant colony algorithm. There are two pieces of water. Due to the low computational efficiency of multi-type variable optimization method in dealing with large complex structures and layout optimization problems, a discrete variable optimization method for truss structures based on ant colony algorithm is proposed in this paper, which includes: section. Topology shape and layout optimization method. Through the analysis and comparison of several classical examples, it is shown that the optimization effect of this method is remarkable, simple and feasible, and it has a very good application prospect. 3. Based on the successful application of ant colony algorithm in single objective optimization problem, an improved multiobjective ant colony optimization algorithm based on discrete variables is proposed in this paper. On the basis of Pareto ant colony algorithm, the set of "feasible solutions" and "non-feasible solutions" are established, and the computational efficiency of the algorithm is improved by replacing the repeated solutions in the optimization process. This method can not only solve the two-objective function problem, but also solve the multi-objective optimization problem of truss structure. 4. Considering the particularity and complexity of transmission tower structure and the requirement of consistency of optimization method, this paper summarizes a method of discrete variable optimal design of transmission tower structure based on ant colony algorithm. And the physical meaning and optimization criteria of different optimization contents are expounded clearly and clearly. The results of local and global multi-level optimization design of transmission tower structure show that this method is effective and simple and practical. 5. In view of the high cost, time-consuming and laborious real type test of transmission tower structure, and the vigorous development of finite element method, the safety and reliability of optimization design results are calculated by continuous collapse simulation method of transmission tower and line system in this paper. The method of checking calculation is based on ABAQUS software platform, and the whole process of continuous collapse of transmission tower and line system is simulated by using explicit finite element method and birth and death element technique. In addition, in view of the collapse of different transmission tower models, the weak link, collapse form and anti-collapse ability of transmission tower structure are further discussed in this paper.
【學位授予單位】：大連理工大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TU347

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