Load alleviation control is highly desirable to reduce penalties associated with the added structural mass required to withstand rare load scenarios. This is particularly true for wind turbine designs incorporating long‐span blades. Implementation of compliance‐based morphing structures to modify the lift distribution passively has the potential to mitigate the impact of rare, but integrally threatening, loads on wind turbine blades while limiting the addition of actuation and sensing systems. We present a novel passive load alleviation concept based on a morphing flap exhibiting selective compliance from an embedded bistable element. A multifidelity, aeroelastic tool is used to study the shape adaptability of a morphing flap indicating that passive changes from high lift generation to load alleviation configurations can be achieved by exploiting the energy of the flow. This mechanism offers a method to reduce catastrophic peak loads potentially, thus offering the possibility to lower the overall structural weight of wind turbine blades.

中文翻译：

---

通过气动弹性驱动的选择性顺应变形来减轻风力涡轮机叶片上的被动载荷

减轻负荷控制是非常需要的，以减少与承受罕见负荷情况所需的增加结构质量相关的惩罚。对于包含大跨度叶片的风力涡轮机设计而言尤其如此。基于法规遵从性的变形结构的实现可以被动地修改升力分布，从而有可能减轻罕见但整体上具有威胁性的载荷对风力涡轮机叶片的影响，同时限制致动和传感系统的添加。我们提出了一种新型的被动负载减轻概念，该概念基于变形襟翼展示了来自嵌入式双稳态元件的选择性依从性。多保真 气动工具用于研究变形襟翼的形状适应性，这表明可以通过利用流动能量来实现从高升力生成到减轻载荷配置的被动变化。该机制提供了一种潜在地减少灾难性峰值负载的方法，从而提供了降低风力涡轮机叶片整体结构重量的可能性。