【摘要】：河流與河床相互影響，相互制約，處于變化發(fā)展的過(guò)程中。在水流與河床相互作用的過(guò)程中，，泥沙運(yùn)動(dòng)起著紐帶作用，泥沙的淤積使得河床抬高，通過(guò)泥沙的沖刷，河床降低。對(duì)可能發(fā)生的泥沙運(yùn)動(dòng)過(guò)程和河床變形進(jìn)行定性和定量預(yù)測(cè)的正確與否，直接影響到水利工程的決策與成敗。隨著計(jì)算機(jī)的出現(xiàn)和現(xiàn)代高速電子計(jì)算機(jī)的發(fā)展，數(shù)學(xué)模型和系統(tǒng)模擬已被廣泛應(yīng)用。 本文主要研究?jī)?nèi)容如下： （1）對(duì)彎道水流泥沙運(yùn)動(dòng)規(guī)律的研究進(jìn)展進(jìn)行了系統(tǒng)的闡述，在此基礎(chǔ)上開展本文的研究工作。 （2）建立平面二維水沙數(shù)學(xué)模型，采用Galerkin集中質(zhì)量有限元法相結(jié)合的方法進(jìn)行求解，采用Fortran語(yǔ)言編寫程序?qū)崿F(xiàn)以上算法。 （3）通過(guò)物理模型的實(shí)測(cè)資料來(lái)檢驗(yàn)數(shù)學(xué)模型，模型吻合較好，表明了模型的正確性和合理性，并對(duì)試驗(yàn)中的縱向時(shí)均流速、橫向時(shí)均流速的分布特點(diǎn)進(jìn)行總結(jié)分析。最后對(duì)泥沙落淤情況進(jìn)行了預(yù)測(cè)。
[Abstract]:Rivers and riverbeds interact and restrict each other and are in the process of changing and developing. In the process of interaction between water flow and river bed, sediment movement acts as a link, the silt silting causes the river bed to be raised, and the river bed is reduced by the erosion of sediment. Whether it is correct or not to predict the sediment movement process and the river bed deformation qualitatively and quantitatively has a direct impact on the decision and success of water conservancy projects. With the emergence of computers and the development of modern high-speed electronic computers, mathematical models and system simulation have been widely used. The main contents of this paper are as follows: (1) the research progress of the flow and sediment movement in bends is systematically described, and the research work of this paper is carried out on this basis. (2) the planar two-dimensional mathematical model of water and sediment is established and solved by Galerkin lumped mass finite element method. The above algorithm is realized by programming with Fortran language. (3) the mathematical model is verified by the measured data of the physical model, which shows that the model is correct and reasonable, and the distribution characteristics of the longitudinal and transverse average velocity are summarized and analyzed. Finally, the sediment deposition is predicted.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV149

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 白玉川,NG Chiu-on,沈渙庭,王尚毅;Rheological Properties and Incipient Motion of Cohesive Sediment in the Haine Estuary of China[J];China Ocean Engineering;2002年04期

2 白玉川,李世森,董文軍;不平衡輸沙計(jì)算中泥沙起懸量與沉降量的確定——以沉沙池為例[J];海洋通報(bào);1996年06期

3 И.Л.羅索福斯基;尹學(xué)良;;彎道水流的研究[J];泥沙研究;1958年01期

4 張耀先,焦愛萍;彎曲型河道挾沙水流運(yùn)動(dòng)規(guī)律研究進(jìn)展[J];泥沙研究;2002年02期

5 劉月琴;彎曲型河流基本特性研究進(jìn)展[J];人民珠江;2003年02期

6 王尚毅,顧元h

本文編號(hào)：2352546