Hilbert边际谱在框架结构损伤检测中的应用

杨智春;张慕宇;丁燕;王乐

振动与冲击 ›› 2010, Vol. 29 ›› Issue (11) : 26-29,4.

PDF(1959 KB)
PDF(1959 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (11) : 26-29,4.
论文

Hilbert边际谱在框架结构损伤检测中的应用

  • 杨智春; 张慕宇; 丁燕; 王乐
作者信息 +

Application of Hilbert marginal spectrum in damage detection of frame structure

  • Yang Zhichun; Zhang Muyu; Ding Yan;Wang Le
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文章历史 +

摘要



提出了一种基于Hilbert边际谱的损伤检测方法,在Hilbert边际谱的基础上定义了特征幅值,并以损伤前后同一响应点位置特征幅值的相对变化量来计算用于进行结构损伤检测的损伤指标。由一个8层剪切框架结构的损伤检测仿真算例,获得了所提出的损伤指标与结构健康状态及损伤位置的对应关系,进而提出了利用该损伤指标来检测并定位框架结构损伤的步骤。最后,使用一个8层剪切框架结构的损伤检测实验说明本文方法可以准确识别出框架结构的健康状态以及损伤位置。

Abstract

A new damage detection method based on the Hilbert marginal spectrum is proposed. In this method the acceleration response of measuring points are decomposed by empirical mode decomposition method at first, the Hilbert transform is performed for the intrinsic mode function of the response to obtain Hilbert marginal spectrum, then the characteristic amplitude is defined, and the relative change of the characteristic amplitude at the same response measuring point between intact and damaged structures is used to calculate the damage index. The proposed method is validated using damage detection numerical simulation and model tests of a shear frame structure. The results show that the proposed method can detect and locate the damage with good accuracy.

关键词

Hilbert边际谱 / 损伤检测 / 经验模分解 / Hilbert-Huang变换

Key words

Hilbert marginal spectrum / damage detection / Empirical Mode Decomposition / Hilbert-Huang transform

引用本文

导出引用
杨智春;张慕宇;丁燕;王乐. Hilbert边际谱在框架结构损伤检测中的应用[J]. 振动与冲击, 2010, 29(11): 26-29,4
Yang Zhichun;Zhang Muyu;Ding Yan;Wang Le. Application of Hilbert marginal spectrum in damage detection of frame structure[J]. Journal of Vibration and Shock, 2010, 29(11): 26-29,4

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