一种基于压电晶片阵列的板结构损伤识别方法

彭海阔 孟 光 李富才

振动与冲击 ›› 2009, Vol. 28 ›› Issue (9) : 56-59.

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PDF(1290 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (9) : 56-59.
论文

一种基于压电晶片阵列的板结构损伤识别方法

  • 彭海阔 孟 光 李富才
作者信息 +

A PIEZOELECTRIC TRANSDUCER ARRAY-BASED METHOD FOR DAMAGE DETECTION IN PLATE STRUCTURES

  • PENG haikuo MENG Guang LI Fucai
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摘要

提出一种通过单个压电晶片对板结构进行激励,使用十字形压电晶片阵列接收响应信号,然后基于相控阵原理对信号进行处理,从而对板结构损伤进行识别的方法。首先用谱元法分析了在单点激励下铝板结构有损伤和无损伤时Lamb波的传播情况,得到压电晶片阵列中各阵元所在位置的响应信号。根据压电晶片阵列布置形式及各阵元之间的相互位置,对各阵元接收到的时域信号进行处理,从而对结构的损伤进行识别。通过对板结构中含有一个和两个损伤的情况进行了研究,验证了该方法的有效性。

Abstract

Based on phased array, a method using a transmitter and a cross-shape piezoelectric (PZT) transducer array was proposed for the purpose of damage detection in plate structures. Lamb wave propagation in an aluminum plate with and without a crack was simulated using spectral finite element method. The response signals of the structure were taken in the location of the elements of the PZT array and the difference signals of those responses were calculated. The time shifting is carried out according to the scheme and the relative locations of elements in the PZT array and then the signals are summed to detect damages in structure. The damaged plate structure was investigated using a cross-shape array. The results demonstrate that the proposed method can effectively detect the damages in plate structures.

关键词

结构健康监测 / Lamb波 / 损伤识别 / 相控阵

Key words

Structural health monitoring / Lamb wave / Damage detection / Phased array

引用本文

导出引用
彭海阔 孟 光 李富才. 一种基于压电晶片阵列的板结构损伤识别方法 [J]. 振动与冲击, 2009, 28(9): 56-59
PENG haikuo MENG Guang LI Fucai. A PIEZOELECTRIC TRANSDUCER ARRAY-BASED METHOD FOR DAMAGE DETECTION IN PLATE STRUCTURES[J]. Journal of Vibration and Shock, 2009, 28(9): 56-59

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