本文選題：弧形鋼閘門　切入點(diǎn)：改進(jìn)遺傳算法　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：弧形閘門作為水工建筑物中的工作閘門,對(duì)于水工建筑物的結(jié)構(gòu)安全起到重要的作用�；⌒伍l門的設(shè)計(jì),要做到安全可靠、技術(shù)先進(jìn)、經(jīng)濟(jì)合理。按照現(xiàn)行的弧形閘門設(shè)計(jì)規(guī)范設(shè)計(jì)閘門時(shí),由于對(duì)弧形閘門空間整體結(jié)構(gòu)的忽略,在設(shè)計(jì)時(shí)整體設(shè)計(jì)過于保守,材料性能未能充分發(fā)揮。優(yōu)化設(shè)計(jì)是一種新的設(shè)計(jì)方法,它是將最優(yōu)化原理和計(jì)算機(jī)技術(shù)相結(jié)合,從大量設(shè)計(jì)方案中找出最合適的設(shè)計(jì)方案。本文利用優(yōu)化設(shè)計(jì)的方法,對(duì)弧形閘門進(jìn)行結(jié)構(gòu)優(yōu)化,尋找最佳設(shè)計(jì)方案,以提高設(shè)計(jì)的效率和質(zhì)量。本文以弧形閘門結(jié)構(gòu)為研究對(duì)象,在深入學(xué)習(xí)研究標(biāo)準(zhǔn)遺傳算法及其結(jié)構(gòu)優(yōu)化的原理的基礎(chǔ)上,將改進(jìn)遺傳算法、有限元理論、參數(shù)化建模技術(shù)、Visual Basic編程語(yǔ)言、有限元軟件ANSYS二次開發(fā)技術(shù)相結(jié)合,利用Visual Basic建立弧形閘門結(jié)構(gòu)優(yōu)化系統(tǒng),該系統(tǒng)可以實(shí)現(xiàn)自動(dòng)調(diào)用ANSYS進(jìn)行弧形閘門參數(shù)化建模,并對(duì)弧形閘門進(jìn)行結(jié)構(gòu)截面優(yōu)化和結(jié)構(gòu)尺寸優(yōu)化。具體方法為首先使用ANSYS的APDL語(yǔ)言構(gòu)建弧形閘門參數(shù)化模型,使用Visual Basic編寫改進(jìn)遺傳算法程序及設(shè)置優(yōu)化參數(shù),通過ANSYS二次開發(fā)技術(shù),實(shí)現(xiàn)Visual Basic對(duì)有限元軟件ANSYS的后臺(tái)調(diào)用,并將返回的計(jì)算結(jié)果進(jìn)行優(yōu)化處理,最后輸出弧形閘門最優(yōu)模型。本文首先建立弧形閘門有限元模型,并對(duì)在設(shè)計(jì)工況和自重荷載下工作的弧形閘門進(jìn)行應(yīng)力應(yīng)變分析。在深入研究遺傳算法的基礎(chǔ)上引入模擬退火算法的選擇機(jī)制,提高了算法的運(yùn)算效率,有效的緩解了遺傳算法的局部收斂問題。實(shí)現(xiàn)改進(jìn)遺傳與弧形閘門結(jié)構(gòu)優(yōu)化的結(jié)合,將改進(jìn)遺傳算法成功應(yīng)用在弧形閘門的結(jié)構(gòu)優(yōu)化中。建立弧形閘門結(jié)構(gòu)優(yōu)化系統(tǒng),成功實(shí)現(xiàn)了弧形閘門的結(jié)構(gòu)優(yōu)化,并以一實(shí)際工程為例進(jìn)行計(jì)算。優(yōu)化后案例閘門的重量減輕10.83%,成功實(shí)現(xiàn)了弧形閘門的結(jié)構(gòu)優(yōu)化工作。其次本文對(duì)優(yōu)化前后的弧形閘門結(jié)構(gòu)的應(yīng)力應(yīng)變情況進(jìn)行對(duì)比分析;并在實(shí)現(xiàn)弧形閘門結(jié)構(gòu)優(yōu)化的基礎(chǔ)上,將弧形閘門的設(shè)計(jì)變量進(jìn)行分組對(duì)比,分別對(duì)弧形閘門進(jìn)行了結(jié)構(gòu)截面優(yōu)化及結(jié)構(gòu)尺寸優(yōu)化并對(duì)比了優(yōu)化效果,同時(shí)本文討論了各組優(yōu)化變量的優(yōu)化效果,得出了對(duì)弧形鋼閘門結(jié)構(gòu)優(yōu)化有顯著影響的設(shè)計(jì)變量,為優(yōu)化參數(shù)組合的選取提供參考。由本文的研究結(jié)果可以看出,使用改進(jìn)遺傳算法與數(shù)值模擬相結(jié)合對(duì)弧形鋼閘門結(jié)構(gòu)進(jìn)行優(yōu)化可以得到較好的優(yōu)化結(jié)果。且建立的優(yōu)化系統(tǒng)使用方便,可以節(jié)約設(shè)計(jì)時(shí)間,為設(shè)計(jì)工作提供一定的參考。
[Abstract]:As a working gate in hydraulic structures, arc gate plays an important role in structural safety of hydraulic structure. Reasonable economy. When designing the gate according to the current design code of the arc gate, the overall design of the gate is too conservative due to the neglect of the integral structure of the space of the arc gate. Optimization design is a new design method, which combines optimization principle with computer technology to find out the most suitable design scheme from a large number of design schemes. In order to improve the efficiency and quality of the design, the structure of the radial gate is optimized to find the best design scheme. This paper takes the structure of the arc gate as the research object, on the basis of studying the standard genetic algorithm and the principle of structure optimization in depth. This paper combines the improved genetic algorithm, finite element theory, parametric modeling technology with Visual Basic programming language and the second development technology of finite element software ANSYS to establish the structure optimization system of arc gate by using Visual Basic. The system can automatically call ANSYS to model the arc gate parameterized, and optimize the structure section and size of the arc gate. The concrete method is to construct the parametric model of the arc gate by using the APDL language of ANSYS. Visual Basic is used to program the improved genetic algorithm and set the optimization parameters. Through the secondary development technology of ANSYS, the background call of Visual Basic to the finite element software ANSYS is realized, and the result of calculation is optimized. In this paper, the finite element model of arc gate is established. The stress-strain analysis of arc gate working under design condition and deadweight load is carried out. The selection mechanism of simulated annealing algorithm is introduced on the basis of deep research on genetic algorithm, and the computational efficiency of the algorithm is improved. The problem of local convergence of genetic algorithm is effectively alleviated. The combination of improved genetic algorithm and structural optimization of arc gate is realized. The improved genetic algorithm is successfully applied to the structure optimization of arc gate. The structure optimization system of arc gate is established. The structure optimization of arc gate is realized successfully. Taking a practical project as an example, the weight of the optimized case gate is reduced by 10.833.The structure optimization of the arc gate is realized successfully. Secondly, the stress and strain of the arc gate structure before and after optimization are compared and analyzed in this paper. On the basis of the structural optimization of the arc gate, the design variables of the arc gate are grouped and compared, the structural cross-section optimization and the structural dimension optimization of the arc gate are carried out respectively, and the optimization results are compared. At the same time, the optimization effect of each group of optimization variables is discussed, and the design variables which have a significant influence on the optimization of steel gate structure are obtained, which provides a reference for the selection of optimization parameters. The improved genetic algorithm and numerical simulation can be used to optimize the steel gate structure. The optimization system is easy to use and can save the design time and provide a certain reference for the design work.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV663

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