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Reliability of offshore wind turbines subject to seismic loading

机译：海上风力发电机在地震作用下的可靠性

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摘要

Probabilistic models are developed to predict shear and moment demands on wind turbine support structures subject to seismic excitations, and environmental (wind, wave, and current) and operational loadings. The probabilistic models are formulated starting from existing deterministic models and developing correction terms that capture the inherent bias. The correction terms and a model error are assessed using data obtained from detailed three dimensional nonlinear finite element analyses of a set of wind turbine systems that consider different design parameters. The finite element analyses account for the aerodynamic damping of operating wind turbines and the dynamic soil-structure interaction. The proposed probabilistic seismic demand models provide unbiased predictions of the seismic demand on support structures and properly account for the underlying uncertainties. The developed demand models are used to compute fragility estimates of an example support structure defined as the conditional probability of not meeting specified capacity levels.
机译：开发了概率模型，以预测受地震激励，环境（风，波和电流）和运行负荷影响的风力涡轮机支撑结构的剪切力和弯矩需求。概率模型是从现有的确定性模型开始，并开发捕获固有偏差的校正项来制定的。使用从一组考虑了不同设计参数的风力涡轮机系统的详细三维非线性有限元分析中获得的数据，评估校正项和模型误差。有限元分析考虑了运行中的风力涡轮机的空气动力学阻尼以及土壤与结构之间的动态相互作用。所提出的概率地震需求模型提供了对支撑结构上地震需求的无偏预测，并适当考虑了潜在的不确定性。已开发的需求模型用于计算示例性支撑结构的脆弱性估计值，该示例性支撑结构定义为不满足指定容量水平的条件概率。

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