白噪声激励下的复合材料层合结构损伤检测的内积向量法

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (4) : 127-131.

论文

白噪声激励下的复合材料层合结构损伤检测的内积向量法

王乐，杨智春，王慧，党晓娟，丁燕

作者信息 +

Damage Detection of Composite Laminated Structure Using Inner Product Vector under White Noise Excitation

WANG Le, YANG Zhichun, WANG Hui, DANG Xiaojuan, DING Yan

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摘要

利用白噪声激励下结构各测点的动力学响应之间的互相关函数，引入了内积向量（Inner Product Vector，IPV）的概念，提出了应用内积向量进行结构损伤检测的方法，并分析了测试噪声对基于内积向量的损伤检测方法的影响。通过对复合材料层合梁的分层损伤检测仿真算例，验证了该方法检测损伤的有效性以及较高的抗噪能力。

Abstract

Using the cross correlation function of the vibration responses under white noise excitation, a novel concept of inner product vector (IPV) is introduced. Based on the conception of IPV, a new damage detection method is proposed, and the measuring noise resistant ability of the proposed method is also analyzed theoretically. It is proven that the IPV can be easily formed using the inner product of the time domain vibration responses; the value of IPV is dependent on the mode shapes of the structure and the influence of measuring noise on the damage detection results can be adaptively eliminated in the calculation of IPV. Numerical simulation examples of delamination damage detection for a composite laminated beam demonstrated the effectiveness and the anti-noise ability of the proposed method.

导出引用

王乐;杨智春;王慧;党晓娟;丁燕. 白噪声激励下的复合材料层合结构损伤检测的内积向量法[J]. 振动与冲击, 2009, 28(4): 127-131

WANG Le;YANG Zhichun;WANG Hui;DANG Xiaojuan;DING Yan. Damage Detection of Composite Laminated Structure Using Inner Product Vector under White Noise Excitation[J]. Journal of Vibration and Shock, 2009, 28(4): 127-131

中图分类号： TB123