Fiber Bragg Grating-Based System for 2-D Analysis of Vibrational Modes of a Steel Propeller Blade
Fiber Bragg Grating-Based System for 2-D Analysis of Vibrational Modes of a Steel Propeller Blade
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DOI：
10.1109/jlt.2014.2361631
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发表时间：
2014-12
影响因子：
4.7
通讯作者：
S. Javdani;M. Fabian;M. Ams;J. Carlton;T. Sun;K. Grattan
中科院分区：
文献类型：
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作者：
S. Javdani;M. Fabian;M. Ams;J. Carlton;T. Sun;K. Grattan
本文报告了使用基于光纤布拉格光栅 (FBG) 的传感器研究悬臂钢螺旋桨叶片的位移模态形状所获得的结果，首次使用 FBG 阵列进行振动监测。获得的实验数据与使用专有软件进行的同一叶片有限元分析的数据进行交叉比较。在所使用的实验配置中，形成一系列传感器阵列的光栅网络安装在所研究的叶片上以监测其弯曲模式，而另一组光栅垂直于该阵列安装以监测扭转模式。为了获得特定频率下叶片中产生的应变模式的形状，捕获了光纤光栅阵列随时间变化的动态响应，然后使用傅里叶变换算法进行处理，以显示叶片的固有频率。结果，获得了板的前九个固有频率的弯曲、扭转和耦合模态的位移模态形状。实验数据与理论分析非常吻合。本文展示了使用轻量级、微创传感技术分析螺旋桨叶片的潜力，从而说明了克服某些商业螺旋桨设计中螺旋桨有害影响的有效方法。
This paper reports results obtained using fiber Bragg grating (FBG)-based sensors to investigate the displacement mode shapes of a cantilevered steel propeller blade, using FBG arrays for vibration monitoring for the first time. The experimental data obtained are cross compared with those from a finite element analysis of the same blade, undertaken using proprietary software. In the experimental configuration used, a network of gratings, forming a series of sensor arrays, was mounted on the blade under study to monitor its bending modes, while a further set was mounted perpendicular to this array to monitor torsional modes. To obtain the shape of the strain modes generated in the blade at specific frequencies, the dynamic response of the FBG arrays, as a function of time, was captured and then processed using Fourier transform algorithms to show the natural frequencies of the blade. As a result, the displacement modes shapes for the bending, torsional, and coupled modes of the first nine natural frequencies of the plate were obtained. The experimental data show very good agreement with theoretical analysis. This paper demonstrates the potential of using the lightweight, minimally invasive sensing technique described for the analysis of propeller blades and, thus, illustrating an effective method to overcome the deleterious effects of propellers seen in some commercial propeller designs.