本文關(guān)鍵詞： 滲流 自由面 逸出面 批量節(jié)點處理 APDL　出處：《沈陽農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：滲流計算對于設(shè)計階段的壩型選擇、尺寸擬定、竣工后的運行安全都至關(guān)重要。本文分析了前人的研究成果,在此基礎(chǔ)上對滲流計算問題進(jìn)行探討。首先,對滲流分析方法進(jìn)行闡述,主要分為解析法、實驗分析法、數(shù)值模擬法。在數(shù)值解法中,自由面及逸出面的處理是求解的關(guān)鍵問題。自由面的處理方法比較成熟,分為剩余流量法、單位傳導(dǎo)矩陣調(diào)整法、初流量法、虛單元法和截止負(fù)壓法等。處理逸出面的方法分為近邊界面浸潤線延長線法、單個節(jié)點處理法、批量節(jié)點處理法等。本文詳細(xì)討論了各種逸出面處理方法,并進(jìn)行了評價。經(jīng)過綜合對比,肯定了批量節(jié)點處理法的優(yōu)勢。隨后,文章對批量節(jié)點處理法進(jìn)行了梳理歸納,從變分原理的角度闡述了逸出面問題的一些規(guī)律,對現(xiàn)有的批量節(jié)點處理法進(jìn)行了驗證并對各個方法的有效性給予評價。根據(jù)對現(xiàn)有批量逸出點的討論,本文提出了逸出面的改進(jìn)的處理方法,即同時進(jìn)行水頭檢驗H法和流量檢驗Q法。根據(jù)所提方法,采用通用有限元軟件ANSYS的APDL語言進(jìn)行編程,在程序中對自由面、逸出面、程序總體框架、收斂標(biāo)準(zhǔn)等問題逐個進(jìn)行解決并完成了程序代碼的編寫。文章的最后運用所編寫程序?qū)λ岱椒ㄟM(jìn)行驗證。分別進(jìn)行了二維和三維模擬,在二維模擬中驗證了本文所提方法的正確性、對于解決多個逸出點問題的有效性;在三維模擬中驗證了所提方法對三維模型的適用性性。
[Abstract]:Seepage calculation is very important for dam type selection, size determination and operation safety after completion. Based on the analysis of previous research results, the seepage calculation problem is discussed. First of all. The seepage analysis method is described, which is divided into analytical method, experimental analysis method and numerical simulation method. The treatment of free surface and free surface is the key problem to solve the problem. The free surface processing method is more mature, including residual flow method, unit conduction matrix adjustment method, initial flow method. Virtual element method and cut-off negative pressure method. The methods to deal with escape are extended line method, single node processing method, batch node processing method and so on. In this paper, a variety of escape processing methods are discussed in detail. After comprehensive comparison, the advantages of batch node processing method are confirmed. Then, the article summarizes the batch node processing method. From the point of view of variational principle, this paper expounds some laws of the problem of escape, validates the existing batch node processing method and evaluates the effectiveness of each method. According to the discussion of the existing batch escape points. In this paper, an improved method is put forward, that is, the water head test H method and the flow check Q method are carried out simultaneously. According to the proposed method, the general finite element software ANSYS APDL language is used to program. In the process of free surface, escape, the overall framework of the program. Convergence standard and other problems are solved one by one and the programming code is completed. Finally, the proposed method is verified by the program written in this paper. Two and three dimensional simulations are carried out respectively. In the two-dimensional simulation, the correctness of the proposed method is verified, and it is effective to solve the problem of multiple escape points. The applicability of the proposed method to the three-dimensional model is verified in three-dimensional simulation.
【學(xué)位授予單位】：沈陽農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV139.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 朱明;李宏偉;;小論地面通體磚鑲貼中的節(jié)點處理[J];黑龍江科技信息;2010年13期

2 王健;;地面通體磚施工中的處理[J];黑龍江科技信息;2011年13期

相關(guān)會議論文 前1條

1 李偉;;GCL在人工湖防滲節(jié)點處理[A];中國防水工程技術(shù)論壇論文集[C];2006年

相關(guān)博士學(xué)位論文 前1條

1 劉軍;面向復(fù)雜網(wǎng)絡(luò)的節(jié)點重要性排序和級聯(lián)失效研究[D];重慶大學(xué);2016年

相關(guān)碩士學(xué)位論文 前1條

1 王盛寶;滲流逸出面確定方法的改進(jìn)及實例驗證[D];沈陽農(nóng)業(yè)大學(xué);2017年

，

本文編號：1467719