%0 Journal Article
%T 应变片在复合材料低能量冲击定位中的应用<br>Low Energy Impact Localization of Composite Materials Based on Resistance Strain Gauge
%A 赵刚
%A 李书欣
%A 刘立胜
%A 李昆
%J 振动.测试与诊断
%D 2018
%R 10.16450/j.cnki.issn.1004-6801.2018.03.014
%X 针对应用在航空结构中的碳纤维增强树脂基复合材料（carbon fiber reinforced plastics ,简称CFRP）的冲击与振动检测的需求，提出了利用电阻式应变片实现冲击定位的方法。通过应变片获取动态应变信号，运用小波变换提取信号的波达时间，采用Mindlin板理论计算波速，最后使用笔者提出的定位算法计算冲击源的位置。在一个尺寸为400mm×400mm×2mm的CFRP层合板样板上进行实验，结果显示误差小于10mm，证明所提出的方法可用于碳纤维增强树脂基复合材料层合板的冲击定位，为航空结构的结构健康监控提供了一定的依据。<br>According to the requirements of the impact and vibration testing for carbon fiber reinforced plastics (CFRP) used in aircraft structures, the method of achieving impact localization with resistance strain gauge is proposed. First, the dynamic strain signal is received from the resistance strain gauge. Then,the wavelet transform is applied to extract the arrival time of the signal. The wave velocity is calculated based on Mindlin plate theory. Finally, the coordinate of the impact source can be obtained by the localization algorithm proposed in this paper. Experiments are carried out on a carbon fiber laminate plate with the size of 400mm≠400mm≠2mm.The experimental results show that the error is less than 10mm.Thus, this paper provides a feasible approach to achieve structural health monitoring of aircraft structures.
%K 低能量冲击
%K 电阻式应变片
%K 小波变换
%K 定位
%K 碳纤维增强树脂基复合材料&lt
%K br&gt
%K low energy impact
%K resistance strain gauge
%K wavelet transform
%K localization
%K carbon fiber reinforced plastics (CFRP)
%U http://zdcs.nuaa.edu.cn/ch/reader/view_abstract.aspx?file_no=201803014&flag=1