【摘要】：隨著我國(guó)水力資源的開(kāi)發(fā),砌石拱壩在中小型水利工程建設(shè)中發(fā)揮著重要的作用。它以水泥用量低,大量的筑壩材料能夠就地取材,對(duì)相關(guān)的施工器械和技術(shù)需求較低,便于廣大群眾操作等許多優(yōu)點(diǎn)進(jìn)而得到廣泛應(yīng)用。依據(jù)科學(xué)的方法和理論對(duì)壩體體形優(yōu)化設(shè)計(jì)是砌石拱壩設(shè)計(jì)中重要的一個(gè)環(huán)節(jié),其體形合理與否直接關(guān)乎到大壩的造價(jià)與安全,是同時(shí)也是項(xiàng)目批復(fù)與否的重要依據(jù)。因此,研究砌石拱壩體形優(yōu)化的理論與方法有著重要的實(shí)際意義。本文針對(duì)樂(lè)安惠民砌石拱壩壩址的現(xiàn)實(shí)狀況,結(jié)合大壩空間布置,應(yīng)用有限元軟件,綜合考慮幾何、應(yīng)力和穩(wěn)定等約束條件,擬定較優(yōu)壩體體形設(shè)計(jì)方案,對(duì)優(yōu)化方案的可行性進(jìn)行分析論證,從而得出經(jīng)濟(jì)而實(shí)用的砌石拱壩體形。本論文的主要工作內(nèi)容如下:(1)本文在總結(jié)有限元計(jì)算方法的基礎(chǔ)上,進(jìn)一步介紹了有限元法分析的基本原理,列出了有限元數(shù)值分析方法的步驟,探究了拱壩優(yōu)化方法中的設(shè)計(jì)變量,提出了拱壩優(yōu)化設(shè)計(jì)方法中的目標(biāo)函數(shù),確立了拱壩優(yōu)化設(shè)計(jì)中的約束方程,從而構(gòu)建了基于有限元數(shù)值分析方法的拱壩體形優(yōu)化數(shù)學(xué)模型。(2)本文探討了拱壩體形的參數(shù)化設(shè)計(jì),介紹了拱冠梁及水平拱圈的參數(shù)化設(shè)計(jì)方法,并通過(guò)軟件內(nèi)置APDL參數(shù)化語(yǔ)言,完成了建立坐標(biāo)系、拱冠梁曲線、水平拱圈和建立實(shí)體模型等建模步驟,詳細(xì)敘述了模型建立的過(guò)程,實(shí)現(xiàn)了拱壩的參數(shù)化建模。(3)對(duì)壩體模型進(jìn)行不同工況荷載條件下的三維有限元靜力分析計(jì)算,驗(yàn)證初步設(shè)計(jì)壩型的安全穩(wěn)定性能,并通過(guò)拱壩優(yōu)化設(shè)計(jì)原理及方法,借助有限元分析軟件,實(shí)現(xiàn)擬建樂(lè)安惠民砌石拱壩體形優(yōu)化設(shè)計(jì)。
[Abstract]:With the development of hydraulic resources in China, masonry arch dams play an important role in the construction of small and medium-sized water conservancy projects. It has many advantages, such as low cement consumption, large quantity of damming materials, low demand for relevant construction equipment and technology, and easy operation by the masses, and then it has been widely used. According to the scientific method and theory, the optimum design of dam body shape is an important link in the design of masonry arch dam. Whether its shape is reasonable or not is directly related to the cost and safety of the dam, and is also an important basis for the approval of the project. Therefore, it is of great practical significance to study the theory and method of shape optimization of masonry arch dam. In view of the actual situation of Huimin masonry arch dam site in Le'an, combined with the space arrangement of the dam, and the application of finite element software, considering the constraints of geometry, stress and stability, the optimum design scheme of dam body shape is drawn up in this paper. The feasibility of the optimization scheme is analyzed and demonstrated, and the economic and practical shape of masonry arch dam is obtained. The main work of this paper is as follows: (1) on the basis of summarizing the finite element method, this paper further introduces the basic principle of the finite element analysis, and lists the steps of the finite element numerical analysis method. This paper probes into the design variables in the arch dam optimization method, puts forward the objective function in the arch dam optimization design method, and establishes the constraint equation in the arch dam optimization design. Thus, a mathematical model of arch dam shape optimization based on finite element numerical analysis method is constructed. (2) the parametric design of arch dam shape is discussed, and the parametric design method of arch crown beam and horizontal arch ring is introduced. The steps of establishing coordinate system, curve of arch crown and beam, horizontal arch ring and building solid model are completed by APDL parameterized language built in the software, and the process of model establishment is described in detail. The parametric modeling of arch dam is realized. (3) the static analysis and calculation of 3D finite element method are carried out on the dam body model under different working conditions to verify the safety and stability performance of the preliminary design dam type, and through the optimization design principle and method of arch dam, With the help of finite element analysis software, the shape optimization design of the proposed Huimin masonry arch dam is realized.
【學(xué)位授予單位】：南昌工程學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TV641.31

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本文編號(hào)：2297591