考虑流固耦合影响下的海上风电筒型基础的水平荷载特性研究
发布时间：2018-10-08 16:01
【摘要】：随着社会的发展,各个国家对能源的利用日趋增加,而风能不仅成本较低、取之不尽、清洁环保,而且具有一定的商业价值,逐渐受到重视。近年来,沿海地带的风能开发利用也有了长足的进步,与此同时对于比较新颖的海上风电筒型基础提出了更多更高的要求,在近海区的土质比较复杂,土层的含水率比较高的前提下,按照非流固耦合来计算的结果的精确度不如考虑流固耦合影响下的荷载计算结果高,因此对于流固耦合的研究日渐受到人们重视。由于应力场与流场的相互作用,其过程较为复杂,水的存在对土的抗剪强度影响比较大,因此有必要研究在此基础上对筒型基础的水平荷载进行分析。本文通过采用大型的ABAQUS有限元软件模拟单筒筒型基础三维模型,对比了流固耦合影响下无分舱板筒型基础水平荷载与非流固耦合下的筒型基础的区别,考虑流固耦合影响下有分舱板的筒型基础水平荷载与不考虑时的区别,同时也对比了流固耦合影响下的带分舱板与无分舱板的水平荷载的区别,指出带有分舱板的筒型基础的优势与劣势。此外本文也分析了流固耦合影响下的不同埋深以及不同土质条件下的筒型基础水平荷载的变化规律以及破坏模式。以上研究把土体分为土颗粒与孔隙水分别来考虑,使得计算结果更接近真实情况,同时采用分舱板与无分舱板的对比也为筒型基础后续的设计研究和不同条件下的应用提供了参考。
[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.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU476
本文编号：2257371
[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.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU476
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