For wind turbines operating in cold weather conditions, ice accretion is an established issue that remains an obstacle in effective turbine operation. While the aerodynamic performance of wind turbine blades with ice accretion has received considerable research attention, few studies have investigated the structural impact of blade ice accretion. This work proposes an adaptable projection-based method to superimpose complex ice configurations onto a baseline structure. The proposed approach provides an efficient methodology to include ice accretion in the high-fidelity isogeometric shell analysis of a realistic wind turbine blade. Linear vibration and nonlinear deflection analyses of the blade are performed for various ice configurations to demonstrate the impact of different ice accretion distributions on structural performance. These analyses indicate decreases in the blade natural frequencies and deflection under icing conditions. Such ice-induced changes clearly reveal the need for structural design consideration for turbines operating under icing conditions.

中文翻译：

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风力机叶片积冰的等几何分析

对于在寒冷天气条件下运行的风力涡轮机，积冰是一个既定问题，仍然是有效涡轮机运行的障碍。虽然带有积冰的风力涡轮机叶片的空气动力学性能受到了相当多的研究关注，但很少有研究调查叶片积冰的结构影响。这项工作提出了一种基于投影的适应性方法，将复杂的冰配置叠加到基线结构上。所提出的方法提供了一种有效的方法，可以在真实风力涡轮机叶片的高保真等几何壳分析中包括积冰。对各种冰配置进行叶片的线性振动和非线性挠度分析，以证明不同的积冰分布对结构性能的影响。这些分析表明在结冰条件下叶片固有频率和偏转会降低。这种冰引起的变化清楚地表明需要对在结冰条件下运行的涡轮机进行结构设计考虑。