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On the use of Optical Fiber Bragg Grating (FBG) Sensor Technology for Strain Modal Analysis

机译:用于光纤布拉格光栅(FBG)传感器技术的使用进行菌株模态分析

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This paper discusses the use of optical fiber Bragg grating (FBG) strain sensors for structural dynamics measurements. For certain industrial applications, there is an interest to use strain sensors rather than or in combination with accelerometers for experimental modal analysis. Classical electrical strain gauges can be used hereto, but optical strain sensors are an interesting alternative with some very specific advantages. This paper gives an overview of dynamic strain measurements in industrial applications, discusses the benefits of FBG sensors and reviews their measurement principle. Finally, the concept of strain modal analysis is introduced and a helicopter main rotor blade vibration testing and analysis case study is presented.
机译:本文讨论了使用光纤布拉格光栅(FBG)应变传感器进行结构动力学测量。 对于某些工业应用,有兴趣使用应变传感器而不是与实验模态分析的加速度计组合。 可以使用古典电应变仪,但光学应变传感器是一种有趣的替代方案,具有一些非常具体的优点。 本文概述了工业应用中的动态应变测量,讨论了FBG传感器的好处并点评他们的测量原理。 最后,引入了应变模态分析的概念,并提出了直升机主转子叶片振动测试和分析案例研究。

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