飞机加筋壁板紧固件松脱损伤检测的自相关分析方法

PDF(1207 KB)

振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 13-16.

论文

飞机加筋壁板紧固件松脱损伤检测的自相关分析方法

杨智春; 张慕宇; 王乐

作者信息 +

Damage detection of fastener loosening of aircraft stiffened panel by auto correlation analysis

Yang Zhi-chun; Zhang Mu-yu; Wang Le

Author information +

文章历史 +

摘要

提出了一种基于自相关函数的损伤检测方法。首先证明归一化后的结构各测点加速度响应自相关函数零点值仅与结构的模态参数有关，然后利用其构造损伤指标用于结构损伤的定位。飞机加筋壁板紧固件松脱损伤的损伤检测实验表明，该方法只需要利用结构在一定带宽白噪声激励下的加速度响应就能准确定位加筋壁板紧固件的松脱损伤，适用于紧固件松脱损伤的实时检测。

Abstract

An approach to detect structural damage using auto correlation function is proposed. The normalization of the auto correlation function of the acceleration response at time zero is theoretically proved only depended on the modal parameters of the structure, which is used to get the damage index to locate the damage. The feasibility and the effectiveness of the proposed method are verified by damage detection experiments of the fastener loosening of aircraft stiffened panel under white noise excitation. The results of the damage detection experiments also show that the proposed method, which only the acceleration response is needed, is suitable for real time detection of the fastener loosening.

导出引用

杨智春;张慕宇;王乐. 飞机加筋壁板紧固件松脱损伤检测的自相关分析方法[J]. 振动与冲击, 2011, 30(11): 13-16

Yang Zhi-chun;Zhang Mu-yu;Wang Le. Damage detection of fastener loosening of aircraft stiffened panel by auto correlation analysis[J]. Journal of Vibration and Shock, 2011, 30(11): 13-16