蜂窝夹层板结构中导波的传播特性及其脱粘损伤的检测

彭博,税国双,汪越胜

振动与冲击 ›› 2019, Vol. 38 ›› Issue (12) : 140-147.

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (12) : 140-147.
论文

蜂窝夹层板结构中导波的传播特性及其脱粘损伤的检测

  • 彭博,税国双,汪越胜
作者信息 +

Properties of guided waves propagating in honeycomb sandwich plates and the detection of disbonding damage using ultrasonic waves

  • PENG Bo,SHUI Guoshuang,WANG Yuesheng
Author information +
文章历史 +

摘要

利用有限元模型研究了蜂窝夹层板结构中导波的传播特性,并进行了蜂窝夹层板结构中蒙皮与蜂窝芯脱粘损伤检测的实验研究。首先建立了基于实际蜂窝夹层板结构的有限元模型,利用COMSOL Multiphysics软件模拟了导波在完好结构和含有脱粘损伤结构中的传播规律。结果表明,导波在蜂窝夹层板中传播时具有频散和多模态特性,可通过频散关系确定导波的各阶模态,且 模态对脱粘损伤最敏感。采用压电片作为激励源,选取窄带脉冲作为激励信号激发导波,利用Polytec激光测振仪采集蜂窝夹层板中的导波信号。对信号进行小波变换,提取 模态的幅值,并在此基础上通过损伤概率算法定位脱粘损伤的位置。结果表明, 模态幅值可作为损伤检测的参数,且重构的脱粘损伤与实际的脱粘损伤位置吻合较好。

Abstract

Properties of guided waves propagation in honeycomb sandwich plates were studied based on a finite element model, and a experimental study on detection of disbonding damage within the honeycomb sandwich structure was conducted by using ultrasonic waves.A finite element model was employed based on an actual honeycomb sandwich plate structure, and the propagations of guided waves both in perfect and damaged structure were simulated using the commercial software COMSOL Multiphysics.In the experimental study, piezoelectric wafers were used to excite the guided waves, and the waves were acquired using a Polytec Scanning Vibrometer.It was shown that the guided waves possess the features of dispersion and multi-modes; A0 mode is sensitive to the disbonding damage in the honeycomb sandwich structure, and the experimental result agrees well with the simulation.Furthermore, disbonding damage was located based on wavelet transform and damage probability imaging.

关键词

蜂窝夹层板结构 / 超声导波 / 脱粘损伤 / 小波变换 / 损伤概率算法

Key words

honeycomb sandwich plate / ultrasonic guided waves / disbonding damage / wavelet transform / damage probability imaging

引用本文

导出引用
彭博,税国双,汪越胜. 蜂窝夹层板结构中导波的传播特性及其脱粘损伤的检测[J]. 振动与冲击, 2019, 38(12): 140-147
PENG Bo,SHUI Guoshuang,WANG Yuesheng. Properties of guided waves propagating in honeycomb sandwich plates and the detection of disbonding damage using ultrasonic waves[J]. Journal of Vibration and Shock, 2019, 38(12): 140-147

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