潮流能水轮机复合材料叶片的损伤特性研究

Study on the Damage Characteristics of Composite Blades of a Tidal Current Turbine

针对某型潮流能水轮机复合材料叶片,提出了一种损伤特性分析方法。基于Tsai-Hill失效准则建立复合材料叶片损伤模型。针对正常运行工况的复合材料叶片,提出了一种损伤特性分析方法。运用叶素动量理论计算水动力载荷。最后基于碳玻混杂技术,分析叶片碳玻混杂梁帽对损伤特性的影响。结果表明,叶片的损伤主要出现在梁帽部位。碳玻混杂设计方法能够降低叶片在运行时的最大应力、叶尖挠度和失效因子,同时也能减轻叶片质量,为轻质高性能水轮机复合材料叶片的设计提供了重要参考价值。

For fiber reinforced polymer(FRP)composite blades of a type of tidal current turbines,a method of damage characteristics analysis was proposed.The composite blade damage model based on Tsai-Hill failure criterion was established.The hydrodynamic loadings were determined by using the blade element momentum(BEMT).With the application of the carbon/glass hybrid technology,the effects of carbon/glass hybrid spar cap on damage characteristics were analyzed.The results showed that damage mainly appeared in the spar cap.This hybrid method can not only reduce the maximum stress,blade tip deflection and failure factor,but also reduce the blade weight.This study provides a significant reference for the design of lightweight and high-performance composite blades of hydroturbines.