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首页> 外文会议>IMAC Conference on Structural Dynamics >Full Field Dynamic Strain on Wind Turbine Blade Using Digital Image Correlation Techniques and Limited Sets of Measured Data from Photogrammetric Targets
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Full Field Dynamic Strain on Wind Turbine Blade Using Digital Image Correlation Techniques and Limited Sets of Measured Data from Photogrammetric Targets

机译：风力涡轮机叶片上的全场动态应变，使用数字图像相关技术和从摄影测量目标的测量数据集合

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摘要

Wind turbine blades are subjected to dynamic loadings in operation (as well as in the certification process) that result in dynamic stresses and strains that are important to understand. Generally, only a small number of strain gages are used in the certification process and even fewer, if any at all, are installed for operational measurements. Recent advances in digital image correlation (DIC) and digital photogrammetry (DP) have allowed for new opportunities for blade inspection and structural health monitoring. This paper presents several different methods for determining the dynamic stresses and strains using (a) digital image correlation techniques, (b) dynamic photogrammetry techniques and (c) a newly developed expansion process in conjunction with the finite element model to predict stresses and strains from limited measurement locations. All three approaches are discussed and used in the evaluation of a Southwest Wind Power turbine blade subjected to static loading and dynamic loading (sine dwell, multi-sine dwell and pluck testing) typical of the certification process. The advantages of each of the techniques are described and discussed in the paper.
机译：风力涡轮机叶片在操作（以及认证过程中的动态载荷（以及认证过程中），这导致动态应力和重要的菌株来理解。通常，在认证过程中仅使用少量的应变计，甚至安装在操作测量中的任何情况下。数字图像相关性（DIC）和数码摄影测量（DP）的最新进展使得刀片检测和结构健康监测的新机会。本文介绍了使用（a）数字图像相关技术，（b）动态摄影测量技术和（c）结合有限元模型来确定压力和菌株的新开发的扩展过程来确定动态应力和株的几种不同方法。有限的测量位置。所有三种方法都讨论并用于评估对静态装载和动态负载（正弦居住，多正弦居住和采集测试）进行静态负载和动态载荷（正弦，多正弦和拔拔测试）的评估。本文描述和讨论了每个技术的优点。

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