基于光纤光栅的碳纤维复合材料高温振动性能的研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (12): 24-28.

基于光纤光栅的碳纤维复合材料高温振动性能的研究

夏萍, 杨海如, 谭跃刚

武汉理工大学机电工程学院,武汉430070

收稿日期:2019-09-02 出版日期:2019-12-28 发布日期:2019-12-28
作者简介:夏萍(1984-),女,博士研究生,主要从事高温光纤传感及工程应用方面的研究,xiaping525@163.com。
基金资助:
国家自然科学基金(51375358)

STUDY ON VIBRATION PROPERTIES OF CFRP AT HIGH TEMPERATURES BASED ON FBG

XIA Ping, YANG Hai-ru, TAN Yue-gang

School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China

Received:2019-09-02 Online:2019-12-28 Published:2019-12-28

摘要/Abstract

摘要： 采用光纤布拉格光栅(FBG)作为动应变传感器,基于实验应变模态测试方法,研究了碳纤维复合材料(CFRP)板从室温(25 ℃)到190 ℃范围内的振动特性。运用有限元法分析了室温下CFRP悬臂梁的一、二阶振动频率和振型;采用脉冲锤敲击对CFRP悬臂梁在不同温度下进行了弯曲振动测试,并通过快速傅里叶变换(FFT)得到碳纤维板在每个温度下的一、二阶固有频率。结果表明:随着温度的升高,碳纤维复合材料板的一、二阶频率下降,表明其刚度下降,并较未加热之前发生了永久变化。

关键词: 光纤光栅, 碳纤维复合材料, 高温, 动态特性

Abstract: Based on experimental strain modal tests,the vibration properties of carbon fiber reinforced polymer (CFRP) plate at different elevated temperatures from 25 ℃ to 190 ℃ were investigated using fiber Bragg grating (FBG) as dynamic strain sensors. The 1st and 2nd frequency and vibration mode of CFRP cantilever beam at room temperature were obtained by finite element method. Bending vibration tests were conducted on CFRP cantilever beam at different temperatures through pulse hammer hitting and the 1st and 2nd natural frequency at different elevated temperatures were obtained by Fast Fourier Transform (FFT). The results showed that, the 1st and 2nd natural frequency decreased with the temperature rise, and the stiffness has changed permanently compared with those before heating.

Key words: fiber bragg grating, carbon fiber reinforced polymer, high temperatures, vibration properties

中图分类号:

TB332

夏萍, 杨海如, 谭跃刚. 基于光纤光栅的碳纤维复合材料高温振动性能的研究[J]. 玻璃钢/复合材料, 2019, 0(12): 24-28.

XIA Ping, YANG Hai-ru, TAN Yue-gang. STUDY ON VIBRATION PROPERTIES OF CFRP AT HIGH TEMPERATURES BASED ON FBG[J]. Fiber Reinforced Plastics/Composites, 2019, 0(12): 24-28.

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