| 单层网壳损伤识别理论与试验研究 |
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| 引用本文： | 闫维明,何浩祥,张爱林,王卓.单层网壳损伤识别理论与试验研究[J].空间结构,2009,15(1). |
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| 作者姓名： | 闫维明 何浩祥 张爱林 王卓 |
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| 作者单位： | 北京工业大学工程抗震与结构诊治北京市重点实验室,北京,100124 |
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| 基金项目： | 北京市自然科学基金重点项目，北京市科委奥运专项项目 |
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| 摘 要： | 结构损伤识别可以归结为结构损伤参数的模式识别问题.对结构响应信号进行小波包分解可以获得各频带的信号能量,将此特征向量作为输入,利用支持向量机强大的模式分类功能,可以实现结构的损伤识别.在环境振动下,对1/10比例的单层网壳模型进行损伤识别试验,将不同的杆件沿径向进行相应程度的截面切割用以模拟不同程度的损伤状态.对不同损伤情况的加速度样本进行三层小波包分解,以相应频带的信号能量作为输入建立支持向量机,利用支持向量机对未训练样本的信号能量进行损伤分类.试验结果表明该方法简便准确,验证了小波包和支持向量机方法用于损失识别的有效性.
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| 关 键 词： | 小波包 支持向量机 损伤识别 单层网壳 环境振动 |
Theoretical and experimental research on damage detection for single-layer lattice shell |
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| YAN Wei-ming,HE Hao-xiang,ZHANG Ai-lin,WANG Zhuo.Theoretical and experimental research on damage detection for single-layer lattice shell[J].Spatial Structures,2009,15(1). |
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| Authors: | YAN Wei-ming HE Hao-xiang ZHANG Ai-lin WANG Zhuo |
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| Affiliation: | Beijing Laboratory of Earthquake Engineering and Structural Retrofit;Beijing University of Technology;Beijing 100124;China |
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| Abstract: | The problem on structural damage detection can be viewed as the study on pattern recognition of damage parameters.The signals of structural responses can be decomposed by wavelet packet and the energy of different frequency bands is gained.The energy vector can be used as the input of support vector machine,which has the strong ability on pattern classification,and the damage detection could be realized.A damage detection test for a single-layer bielliptical spherical lattice shell model with a scale of 1/1... |
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| Keywords: | wavelet packet support vector machine damage detection single-layer lattice shell ambient vibration |
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