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  本文選題：渤海海域　切入點：SWAN模式　出處：《天津大學(xué)》2014年碩士論文

【摘要】：隨著社會的不斷發(fā)展與進步，災(zāi)害性海浪這種不可忽視的自然災(zāi)害，，愈發(fā)得到人們的關(guān)注，其中災(zāi)害性近岸波浪與人們的接觸最為直接與頻繁。災(zāi)害性近岸波浪對于近海的海岸基礎(chǔ)建設(shè)、工業(yè)生產(chǎn)作業(yè)、漁業(yè)養(yǎng)殖捕撈等相關(guān)行業(yè)有著深遠的影響。我國海洋經(jīng)濟的健康發(fā)展與完善的保證機制密不可分，所以研究海浪的形成發(fā)展傳播，進行海浪數(shù)值模擬，對波浪要素進行實時預(yù)報具有重要意義。 本文運用最新版本的第三代近岸淺海海浪模式SWAN40.91（SimulatingWaves Nearshore），以高精度WRF（Weather Research And Forecast）風(fēng)場和有限體積非結(jié)構(gòu)網(wǎng)格FVCOM潮流作為驅(qū)動場，在結(jié)合二者的情況下，從計算模式、網(wǎng)格形式、耦合樣式這幾個角度，對渤海海浪數(shù)值預(yù)報模式的豐富與完善進行了研究。最后根據(jù)工程實際，模擬了曹妃甸附近海域的兩處不同坡堤，在不同的反射條件下，海浪要素的變化情況。 計算模式上利用大型工作站多線程的優(yōu)勢，對串行和并行兩種計算模式進行了比較，并行計算可以有效地提高運算效率；網(wǎng)格形式上分別采用結(jié)構(gòu)網(wǎng)格和非結(jié)構(gòu)網(wǎng)格兩種單元，非結(jié)構(gòu)網(wǎng)格的模擬精度要高于結(jié)構(gòu)網(wǎng)格；耦合樣式上，在驗證潮流模型的可行性后，考慮潮流場和不考慮潮流場，考慮表層流與平均流的情形，對比發(fā)現(xiàn)不論是表層流與平均流，在作為輸入項加入模式時，結(jié)果沒有明顯的變化。 為給予波能轉(zhuǎn)換裝置在不同環(huán)境下的構(gòu)型選擇一定的理論參考，文中在綜合考慮波浪運動形態(tài)和波浪作用范圍的基礎(chǔ)上，分別針對海堤和岸堤兩處水工建筑物，進行了海浪數(shù)值模擬。在不同反射條件的影響下，通過選取幾個水工建筑物附近的特征檢驗點，對有效波高和平均周期的變化進行了論述。
[Abstract]:With the development and progress of the society, the disaster wave, which can not be ignored, has been paid more and more attention, among which the disaster near shore wave contact with people is the most direct and frequent.Disaster inshore waves have a profound impact on coastal infrastructure, industrial production, fisheries, aquaculture and fishing.The healthy development of marine economy in our country is closely related to the perfect guarantee mechanism, so it is of great significance to study the formation, development and propagation of ocean waves, to carry out numerical simulation of waves and to forecast wave elements in real time.In this paper, using the latest version of the third generation near shore wave model SWAN40.91(SimulatingWaves near shorehore, the wind field of high precision WRF(Weather Research And forecasting and the finite volume unstructured grid FVCOM power flow are used as the driving fields. Under the combination of the two models, the computational model and the grid form are used.In this paper, the rich and perfect models of wave numerical prediction in Bohai Sea are studied.Finally, according to the engineering practice, two different slope levees near Caofeidian are simulated. Under different reflection conditions, the variation of wave elements is simulated.Based on the advantage of multithreading of large workstation, the parallel computing mode is compared with serial computing mode and parallel computing mode. Parallel computing can effectively improve the efficiency of computing, and in the form of grid, structural grid and unstructured grid are used respectively.The simulation accuracy of the unstructured grid is higher than that of the structural grid, and in the coupling mode, after verifying the feasibility of the power flow model, considering the power flow field and the flow field, the surface flow and the average flow are considered.It is found that there is no obvious change in the results when the input term is added to the model, regardless of the surface flow and the average flow.In order to give a certain theoretical reference to the configuration of wave energy conversion device in different environments, on the basis of synthetically considering the wave motion form and wave action range, the paper aims at two hydraulic structures, seawall and shore embankment, respectively.The wave numerical simulation is carried out.Under the influence of different reflection conditions, the variation of effective wave height and mean period is discussed by selecting several characteristic test points near hydraulic structures.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P731.2

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