本文選題：海洋支撐平臺(tái) + 樁柱結(jié)構(gòu)��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：在海洋波浪環(huán)境下,近海及海洋工程建筑物常年受到風(fēng)、波浪、海流的作用,其中波浪荷載是最主要的控制荷載。在港口工程及近海工程中,樁柱和樁群結(jié)構(gòu)是普遍采用的結(jié)構(gòu)形式,而樁柱結(jié)構(gòu)在波浪場(chǎng)中所受的波浪、流體載荷及其對(duì)波浪場(chǎng)的影響日益成為流體力學(xué)中的一個(gè)重要問題。因此,對(duì)樁柱結(jié)構(gòu)和波浪場(chǎng)之間的雙向流固耦合模擬分析有著十分重要的研究意義。 本文簡(jiǎn)要介紹了我國海洋能的發(fā)展,概括了波浪和海洋結(jié)構(gòu)物相互作用的計(jì)算方法,總結(jié)了波浪數(shù)值模擬的研究進(jìn)展及流固耦合研究進(jìn)展。論述了流固耦合分析時(shí)的控制方程、湍流模型等基本原理,系統(tǒng)的概述了線性波特性、控制方程以及邊界條件。 簡(jiǎn)要的介紹了數(shù)值造波的方法及運(yùn)用VOF法實(shí)現(xiàn)水氣自由液面的設(shè)置方法。應(yīng)用ANSYS-Workbench和CFX軟件建立了三維數(shù)值波浪水槽,通過設(shè)定邊界條件,實(shí)現(xiàn)了三維數(shù)值造波,并對(duì)數(shù)值模型進(jìn)行了驗(yàn)證。其次應(yīng)用ANSYS和CFX對(duì)單樁柱和波浪場(chǎng)進(jìn)行了雙、單向流固耦合模擬計(jì)算,并分析了兩種模擬方法樁柱所受的最大等效應(yīng)力和流場(chǎng)的變化情況,評(píng)價(jià)樁柱的穩(wěn)定性。最后應(yīng)用ANSYS和CFX軟件對(duì)串列雙樁柱和波浪場(chǎng)進(jìn)行了雙向流固耦合模擬,結(jié)合單樁柱的模擬結(jié)果,對(duì)單、雙樁柱上的最大等效應(yīng)力進(jìn)行了對(duì)比。 結(jié)果表明：在給定的波浪條件下,樁柱所受的最大應(yīng)力發(fā)生在樁柱底部,其應(yīng)力值在15704Pa-16320Pa之間呈周期性的變化,根據(jù)Von Mises屈服準(zhǔn)則,說明樁柱在這種波浪條件下是穩(wěn)定的；雙向流固耦合比單向流固耦合更能近似的模擬真實(shí)狀態(tài)；對(duì)單、雙樁柱上的最大等效應(yīng)力進(jìn)行了對(duì)比,串列雙樁柱的最大Von Mises應(yīng)力較單樁柱的最大Von Mises應(yīng)力偏小。本文對(duì)單樁柱和雙樁柱的流固耦合研究方法有一定的參考價(jià)值。
[Abstract]:In the ocean wave environment, offshore and marine engineering buildings are subjected to wind, waves and currents all year round, among which wave load is the most important control load. In port engineering and offshore engineering, pile-column and pile-group structures are generally used as structural forms. The wave, fluid load and its influence on wave field of pile-column structure in wave field are increasingly becoming an important problem in hydrodynamics. Therefore, it is of great significance to study the bidirectional fluid-solid coupling analysis between the pile-column structure and the wave field. This paper briefly introduces the development of ocean energy in China, summarizes the calculation methods of the interaction between waves and ocean structures, summarizes the research progress of numerical simulation of waves and the research progress of fluid-solid coupling. The control equation and turbulence model in fluid-solid coupling analysis are discussed. The linear wave characteristics, control equations and boundary conditions are systematically summarized. This paper briefly introduces the method of numerical wave generation and the method of setting the free surface of water and gas by using VOF method. Three-dimensional numerical wave flume was established by using ANSYS-Workbench and CFX software. The three-dimensional numerical wave generation was realized by setting boundary conditions, and the numerical model was verified. Secondly, ANSYS and CFX are used to simulate the double and unidirectional fluid-structure coupling of single pile column and wave field. The maximum equivalent stress and flow field of the two simulation methods are analyzed, and the stability of pile column is evaluated. In the end, ANSYS and CFX software are used to simulate the two-direction fluid-structure coupling between the two piles and the wave field. The maximum equivalent stress on the single and double piles is compared with the simulation results of the single pile column. The results show that under the given wave conditions, the maximum stress of the pile column occurs at the bottom of the pile column, and its stress value varies periodically between the 15704Pa-16320Pa values. According to the Von Mises yield criterion, the pile column is stable under the wave condition. Two-way fluid-solid coupling is more approximate than unidirectional fluid-solid coupling to simulate the real state, and the maximum equivalent stress on single and double piles is compared. The maximum Von Mises stress of tandem double-pile column is smaller than that of single pile column. This paper has some reference value for the research method of fluid-solid coupling between single pile column and double pile column.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P751

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