【摘要】：隨著社會的發(fā)展,各個國家對能源的利用日趨增加,而風(fēng)能不僅成本較低、取之不盡、清潔環(huán)保,而且具有一定的商業(yè)價值,逐漸受到重視。近年來,沿海地帶的風(fēng)能開發(fā)利用也有了長足的進步,與此同時對于比較新穎的海上風(fēng)電筒型基礎(chǔ)提出了更多更高的要求,在近海區(qū)的土質(zhì)比較復(fù)雜,土層的含水率比較高的前提下,按照非流固耦合來計算的結(jié)果的精確度不如考慮流固耦合影響下的荷載計算結(jié)果高,因此對于流固耦合的研究日漸受到人們重視。由于應(yīng)力場與流場的相互作用,其過程較為復(fù)雜,水的存在對土的抗剪強度影響比較大,因此有必要研究在此基礎(chǔ)上對筒型基礎(chǔ)的水平荷載進行分析。本文通過采用大型的ABAQUS有限元軟件模擬單筒筒型基礎(chǔ)三維模型,對比了流固耦合影響下無分艙板筒型基礎(chǔ)水平荷載與非流固耦合下的筒型基礎(chǔ)的區(qū)別,考慮流固耦合影響下有分艙板的筒型基礎(chǔ)水平荷載與不考慮時的區(qū)別,同時也對比了流固耦合影響下的帶分艙板與無分艙板的水平荷載的區(qū)別,指出帶有分艙板的筒型基礎(chǔ)的優(yōu)勢與劣勢。此外本文也分析了流固耦合影響下的不同埋深以及不同土質(zhì)條件下的筒型基礎(chǔ)水平荷載的變化規(guī)律以及破壞模式。以上研究把土體分為土顆粒與孔隙水分別來考慮,使得計算結(jié)果更接近真實情況,同時采用分艙板與無分艙板的對比也為筒型基礎(chǔ)后續(xù)的設(shè)計研究和不同條件下的應(yīng)用提供了參考。
[Abstract]:With the development of society, the utilization of energy in various countries is increasing day by day, and wind energy is not only low cost, inexhaustible, clean and environmental protection, but also has certain commercial value, and has been paid more and more attention. In recent years, the development and utilization of wind energy in coastal areas have also made considerable progress. At the same time, more and higher requirements have been put forward for the relatively novel offshore wind drum foundations, and the soil quality in offshore areas is relatively complex. On the premise of high moisture content of soil layer, the accuracy of calculation results based on non-fluid-structure coupling is lower than that of load calculation under the influence of fluid-solid coupling, so the research on fluid-solid coupling is paid more and more attention. Because of the interaction between the stress field and the flow field, the process is more complicated, and the existence of water has a great influence on the shear strength of the soil, so it is necessary to study the horizontal load of the cylindrical foundation on this basis. In this paper, a large scale ABAQUS finite element software is used to simulate the three-dimensional model of a single cylinder foundation, and the difference between the horizontal load of the subdivision slab cylindrical foundation and that of the non-fluid-solid coupling is compared under the influence of fluid-solid coupling. Considering the influence of fluid-solid coupling, the difference between the horizontal loads of the cylindrical foundation with subdivision slabs and those without subdivision slabs is compared, and the difference between the horizontal loads with subdivision slabs and without subdivision slabs is also compared. The advantages and disadvantages of cylindrical foundation with subdivision slabs are pointed out. In addition, the variation law and failure mode of horizontal load of cylindrical foundation under the influence of fluid-solid coupling under different buried depth and different soil quality are also analyzed in this paper. The above study divides the soil into soil particles and pore water, so that the calculation results are closer to the real situation. At the same time, the comparison between subdivision slabs and non-subdivision slabs also provides a reference for the further design and research of cylindrical foundation and its application under different conditions.
【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】：TU476

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