首页> 外文会议>Proceedings of the Thirteenth international conference on civil, structural and environmental engineering computing >The Dynamic Stiffness of Surface Footings for Offshore Wind Turbines: Reliability Based Assessment
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The Dynamic Stiffness of Surface Footings for Offshore Wind Turbines: Reliability Based Assessment

机译:海上风力涡轮机表面基础的动态刚度:基于可靠性的评估

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This study concerns the dynamic stiffness of foundations for large offshore windrnturbines. Especially, the purpose of the analysis is to quantify the uncertaintiesrnrelated to the first natural frequency of a turbine supported by a surface footing onrnlayered soil. The dynamic properties of the turbine structure are subject to relativelyrnsmall uncertainties compared to the properties of the subsoil. Thus, the seabed is notrna homogeneous half-space but contains layers of sand, clay, silt, etc. with depths thatrnvary from one position to another. The depth of the top layer may even change overrntime due to sediment transportation. Further, the stiffness and density of thernmaterials within a single layer is subject to uncertainties. This leads to uncertaintiesrnof the dynamic stiffness of the foundation and therefore the natural frequencies. Thernaim of the study is to quantify the level of uncertainties and discuss the utilization ofrnreliability-based design of surface footings for wind turbines.
机译:这项研究涉及大型海上风力涡轮机地基的动态刚度。特别地,分析的目的是量化与由表面立足的土壤支撑的涡轮机的第一自然频率有关的不确定性。与地基的性质相比,涡轮机结构的动态性质具有较小的不确定性。因此,海床不是均质的半空间,但包含一层从一个位置到另一个位置的深度的沙子,粘土,粉砂等。顶层的深度甚至可能由于沉积物的运输而改变超时时间。此外,单层内的材料的刚度和密度受到不确定性的影响。这导致了基础动态刚度以及自然频率的不确定性。这项研究的目的是量化不确定性的水平,并讨论利用基于可靠性的风力涡轮机表面基础设计。

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