基于时间序列分析的结构损伤识别

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (12) : 108-111.

论文

基于时间序列分析的结构损伤识别

杜永峰1,2 李万润1 李慧1,2 刘迪1

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Structural Damage Identification Based on Time Series Analysis

Du Yong-feng; Li Wan-run; Li Hui; Liu Di

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摘要

针对如何从结构响应信息中提取结构损伤指标的问题，提出了一种基于时间序列分析的结构损伤识别方法。首先对结构响应数据进行预处理，利用完好工况下的结构响应数据作为参考数据，建立自回归（Auto regression-AR）预测参考模型。其次，利用已建立的AR预测参考模型计算待识别工况的残差，将待识别工况的残差与AR预测参考模型的残差的方差之比作为损伤指标，对结构损伤进行识别。最后，通过算例表明，该损伤指标不仅可以判断结构是否发生损伤，而且可以识别结构的损伤位置。

Abstract

A structural damage identification method based on time series analysis was proposed to solve the question how to get the structural damage indexes in structural responses. AR predicted reference model was established using undamaged structural response data after data preprocessing. Secondly, the residual error of damage condition was calculated by AR predicted reference model, and then the variance of time series predicted model residual error was taken as damage index. At last, a single support beam was takes as an case study. Results shows that the damage index proposed can defined whether the damage was existed, and the proposed method can be applied to locate the damage.

导出引用

杜永峰;李万润李慧;刘迪. 基于时间序列分析的结构损伤识别[J]. 振动与冲击, 2012, 31(12): 108-111

Du Yong-feng;Li Wan-run;Li Hui;Liu Di. Structural Damage Identification Based on Time Series Analysis[J]. Journal of Vibration and Shock, 2012, 31(12): 108-111