基于埋入式FBG风力发电机桨叶复合材料监测

Monitoring of composite material in embedded Fiber Bragg Grating based wind turbine blades

随着科技的进步,传统的表贴式光纤光栅已无法满足对风力发电机组监测的需求。因此,本文提出了一种基于埋入式光纤布拉格光栅(Fiber Bragg Grating, FBG)传感网络的风力发电机桨叶碳纤维复合材料损伤监测方法。首先,通过创建碳纤维复合材料试验件的三维模型,并进行有限元仿真,确立了FBG的布点位置。然后,将FBG埋入试验件,并进行力学性能试验,以监测各传感点的应变数值和相关损伤情况。最后,对试验件进行超声波无损探伤验证。实验结果表明,埋入式FBG能够实时动态监测碳纤维复合材料内部的损伤情况,为风力发电机组的结构健康监测积累了经验。

With the advancement of technology,traditional surface-mounted fiber optic gratings can no longer meet the requirements for monitoring wind turbine systems.Therefore,this paper proposes a method for monitoring the damage of carbon fiber composite materials in wind turbine blades using an embedded Fiber Bragg Grating(FBG)sensing network.Firstly,a three-dimensional model of the carbon fiber composite material test specimen is created,and finite element simulation is carried out to determine the placement of FBGs.Subsequently,FBGs are embedded into the test specimens and mechanical performance tests are conducted to monitor the strain values and related damage at each sensing point.Finally,an ultrasonic non-destructive testing is performed to verify the test specimens.Experi-mental results demonstrate that embedded FBGs can dynamically monitor the internal damage of carbon fiber composite materials in real-time,thus accumulating experience for structural health monitoring of wind turbine systems.