本文選題：MIKE21 + 海陽(yáng)中心漁港工程��； 參考：《中國(guó)海洋大學(xué)》2014年碩士論文

【摘要】：漁港的建設(shè)涉及到護(hù)岸建設(shè)、場(chǎng)地回填以及港池疏浚等環(huán)節(jié)，將會(huì)導(dǎo)致海岸線以及水深的變化，從而使得工程附近的水動(dòng)力條件發(fā)生變化，流速、流向等因素的改變又會(huì)對(duì)污染物質(zhì)輸移以及泥沙淤積產(chǎn)生影響。由于工程一旦建成，這些影響便不可恢復(fù)，屬于不可逆的影響。因此，工程施工前選擇合理的設(shè)計(jì)方案顯得尤為重要，合理的工程設(shè)計(jì)方案要求對(duì)海洋環(huán)境的影響要小。本文通過(guò)對(duì)海陽(yáng)中心漁港工程附近海域水動(dòng)力及泥沙沖淤的數(shù)值模擬研究，并通過(guò)分析數(shù)值模擬結(jié)果，得出合理最優(yōu)的方案，為海陽(yáng)中心漁港工程的建設(shè)提供科學(xué)指導(dǎo)。 海岸地區(qū)一般水深較淺，潮流運(yùn)動(dòng)的水平尺度遠(yuǎn)大于垂直尺度，流速等水力學(xué)參數(shù)沿垂直方向的變化較水平方向的變化要小得多。因此，可以采用沿水深積分的平面二維水動(dòng)力和泥沙輸運(yùn)模型來(lái)進(jìn)行數(shù)值模擬。 MIKE21是丹麥水力研究所（簡(jiǎn)稱DHI）開(kāi)發(fā)的系列水動(dòng)力學(xué)軟件之一，屬于平面二維自由表面流模型。MIKE21軟件自1993年研發(fā)以來(lái)，，在國(guó)內(nèi)外得到了廣泛的應(yīng)用，解決了大量地工程問(wèn)題，為工程的建設(shè)提供了理論上的指導(dǎo)。 本文基于MIKE21軟件，建立了工程海域二維水動(dòng)力模型以及泥沙輸運(yùn)模型，研究海陽(yáng)中心漁港工程建設(shè)對(duì)附近海域水動(dòng)力和泥沙沖淤的影響，選出較優(yōu)方案，為海陽(yáng)中心漁港的建設(shè)提供理論上的指導(dǎo)。主要的工作內(nèi)容和結(jié)論如下： 1、本文通過(guò)對(duì)丁字河口、千里巖、古龍嘴與岸線圍成的海域水深、地形資料的搜集，利用MIKE21軟件，建立了二維水動(dòng)力模型。并通過(guò)一些實(shí)測(cè)的數(shù)據(jù)對(duì)該模型的一些特征點(diǎn)進(jìn)行了潮位、流速以及流向的驗(yàn)證。驗(yàn)證結(jié)果表明，該模型是可靠的，適用于實(shí)際工程項(xiàng)目中，還對(duì)工程區(qū)域大范圍海域的流場(chǎng)特征進(jìn)行了簡(jiǎn)要的分析。 2、在建立的水動(dòng)力模型驗(yàn)證正確的基礎(chǔ)上，利用MIKE21軟件分別建立了海陽(yáng)中心漁港兩種方案建設(shè)后的二維水動(dòng)力模型，并數(shù)值模擬了工程建設(shè)對(duì)工程附近海域水動(dòng)力的影響。利用數(shù)值模擬結(jié)果，進(jìn)行水動(dòng)力變化的影響分析。對(duì)兩種方案建設(shè)后對(duì)水動(dòng)力場(chǎng)的影響進(jìn)行了定量分析，通過(guò)對(duì)15個(gè)代表點(diǎn)的流速分析，表明方案1建設(shè)后流速的變化小于方案2建設(shè)后的流速差值變化，即方案1建設(shè)后對(duì)周圍流場(chǎng)的影響小于方案2。 3、在水動(dòng)力場(chǎng)的基礎(chǔ)上，耦合了泥沙輸運(yùn)模型。數(shù)值模擬了波流耦合作用下全年和強(qiáng)浪風(fēng)向SE（15m/s）大風(fēng)作用24h后下，工程前和兩種方案建設(shè)后海底的地形沖淤情況。兩種工程方案分別建設(shè)后，對(duì)海陽(yáng)港和冷家莊之間的外海海域海底地形變化影響均較小，不同方案建設(shè)后泥沙沖淤對(duì)海底地形變化影響的區(qū)別主要體現(xiàn)在工程附近區(qū)域。 4、無(wú)論是波流耦合作用下全年的沖淤趨勢(shì)還是SE（15m/s）大風(fēng)作用24h后的沖淤趨勢(shì)，兩種方案建設(shè)后港池內(nèi)都有不同程度的淤積，但不會(huì)對(duì)通航造成影響；兩種建設(shè)方案的差別主要體現(xiàn)在對(duì)擬建碼頭和岸線之間水道的沖刷作用加強(qiáng)，以及疏港路橋梁下水道沖刷程度的不同。根據(jù)沖淤數(shù)值模擬預(yù)測(cè)結(jié)果分析不同建設(shè)方案對(duì)工程附近疏港路穩(wěn)定性的影響，方案1由于建立了東、西防波堤，使得疏港路附近的沖刷程度減小，能很好地保護(hù)疏港路的穩(wěn)定。因此，通過(guò)泥沙輸運(yùn)模型的計(jì)算結(jié)果分析得出，方案1優(yōu)于方案2。 5、結(jié)合水動(dòng)力場(chǎng)和泥沙沖淤數(shù)值模擬預(yù)測(cè)結(jié)果，通過(guò)對(duì)比分析，可以得出方案1優(yōu)于方案2。 本文在水動(dòng)力和泥沙沖淤數(shù)值模擬的基礎(chǔ)上，選出了較優(yōu)的方案，為海陽(yáng)中心漁港的規(guī)劃設(shè)計(jì)提供了決策的科學(xué)參考。
[Abstract]:The construction of the fishing port involves the construction of the revetment, the backfilling of the site and the dredging of the port, which will lead to the change of the coastline and the depth of the water, so that the hydrodynamic conditions in the vicinity of the project will change, the changes in the flow velocity and the flow direction will affect the transport and siltation of the pollutants. It is not reversible, which is irreversible. Therefore, it is very important to choose a reasonable design scheme before the construction, and the reasonable engineering design scheme requires small impact on the marine environment. In this paper, the numerical simulation of the hydrodynamic and sediment erosion and siltation in the sea area near the Haiyang central fishing port project is studied, and the numerical model is analyzed. Based on the results obtained, a reasonable and optimal plan is drawn up to provide scientific guidance for the construction of Haiyang central fishing port project.
In the coastal area, the water depth is generally shallow, the horizontal scale of the flow motion is far larger than the vertical scale, and the variation of the hydrodynamic parameters along the vertical direction is much smaller than that in the horizontal direction. Therefore, the two-dimensional hydrodynamic and sediment transport model along the depth of water can be used for numerical simulation.
MIKE21 is one of the series of hydrodynamics software developed by the Danish Hydraulic Research Institute (DHI). It belongs to the plane two-dimensional free surface flow model.MIKE21 software since its development in 1993. It has been widely used both at home and abroad. It has solved a lot of engineering problems and provided theoretical guidance for the construction of the project.
In this paper, based on MIKE21 software, a two-dimensional hydrodynamic model and a sediment transport model in the sea area are established, and the influence of the construction of Haiyang central fishing port on the hydrodynamic and sediment erosion and siltation in the surrounding sea area is studied. The optimal scheme is selected to provide theoretical guidance for the construction of the fishing port in Haiyang. The main work contents and conclusions are as follows:
1, by means of MIKE21 software, a two-dimensional hydrodynamic model is established through the collection of water depth and topographic data in the waters of the estuarine estuary, thousand li rock, Gulong mouth and shore line, and some characteristic points of the model are verified by some measured data. The results show that the model is reliable, It is applied to practical engineering projects, and the flow field characteristics of large areas in engineering area are briefly analyzed.
2, on the basis of the validation of the established hydrodynamic model, the two dimensional hydrodynamic model of two schemes in Haiyang central fishing port is established by using MIKE21 software, and the influence of the construction on the hydrodynamic forces near the sea area is numerically simulated. The effects of the numerical simulation on the hydrodynamic changes are analyzed. Two schemes are used. After the construction, the effect of the hydrodynamic field is quantitatively analyzed. Through the analysis of the velocity of the 15 representative points, it is shown that the change of flow velocity after the construction of scheme 1 is less than that after the construction of scheme 2, that is, the influence of the scheme 1 on the surrounding flow field is less than that of the scheme 2..
3, on the basis of the hydrodynamic field, the sediment transport model is coupled, and the terrain erosion and siltation of the seabed after the construction of SE (15m/s) and the wind action of strong wave wind to SE (15m/s) is simulated. After the construction of the two engineering schemes, the seabed topography between the outer sea area and the sea area between Haiyang port and cold house Zhuang Zhuang Zhuang Zhuang Zhuang Zhuang Zi Zhuang Zhuang Zhuang Zhuang Zhuang Zhuang Zhuang Zhuang Autonomous Region is constructed. The difference of the influence of sediment erosion and deposition on the seabed terrain changes is mainly reflected in the vicinity of the project.
4, the erosion and silting trend of the whole year under the coupling of wave and current is also the trend of the erosion and siltation after the SE (15m/s) gale action 24h. After the construction of the two schemes, there are different degrees of siltation in the harbor pool, but it will not affect the navigation, and the difference between the two construction schemes is mainly reflected in the enhancement of the scouring effect of the waterway between the proposed wharf and the shore line, and The influence of different construction schemes on the stability of the dredging Road near the project is analyzed according to the numerical simulation of the erosion and siltation. Scheme 1 because of the establishment of the East and West Breakwater, the degree of scour near the dredge road is reduced, and the stability of the dredging road can be well protected. Therefore, the sediment transport model is adopted. The analysis of the calculation results shows that the scheme 1 is better than the scheme 2..
5, combined with the numerical simulation results of hydrodynamic field and sediment erosion and deposition, it can be concluded that scheme 1 is better than scheme 2. through comparative analysis.
On the basis of numerical simulation of hydrodynamic and sediment scour and deposition, a better scheme has been selected, which provides a scientific reference for the planning and design of Haiyang central fishing port.
【學(xué)位授予單位】：中國(guó)海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731.2;TV148

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