| 结构损伤线性及非线性特征谱模式识别及应用 |
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| 引用本文： | 孟昭秦,何林,刘仕军.结构损伤线性及非线性特征谱模式识别及应用[J].地球科学与环境学报,1999,21(3). |
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| 作者姓名： | 孟昭秦 何林 刘仕军 |
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| 作者单位： | 西安工程学院信电系!陕西西安710054(孟昭秦，刘仕军)，哈尔滨建筑大学建筑工程学院!黑龙江哈尔滨150008(何林) |
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| 基金项目： | 国土资源部九五重点项目 |
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| 摘 要： | 利用时间序列动态数据处理与建模对结构有损状态进行线性和非线性过程处理，用这两种方法对结构的物理状态进行谱分析和模态频率的提取进行了比较，计算结果表明非线性 Ｓ Ｅ Ｔ Ａ Ｒ 模型在特征谱的识别与提取上比线性 Ａ Ｒ Ｍ Ａ Ｘ 模型更有效，对微小损伤更灵敏。说明了在参数识别中非线性 Ｓ Ｅ Ｔ Ａ Ｒ 模型对物体损伤情况下振动数据建模较为客观，更能反映振动体系的损伤信息，是损伤识别数学模型有效的方法。
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| 关 键 词： | 参数识别 结构振动 非线性 动态数据系统 |
APPLICATION OF LINEAR AND NONLINEAR CHARACTER SPECTRUM PATTER RECOGNITION ON STRUCTURE DAMAGE DETECTION |
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| MENG Zhao qin ,HE Lin ,LIU Shi jun.APPLICATION OF LINEAR AND NONLINEAR CHARACTER SPECTRUM PATTER RECOGNITION ON STRUCTURE DAMAGE DETECTION[J].Journal of Earth Sciences and Environment,1999,21(3). |
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| Authors: | MENG Zhao qin HE Lin LIU Shi jun |
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| Institution: | MENG Zhao qin 1,HE Lin 2,LIU Shi jun 1 |
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| Abstract: | This paper presents linear and nonlinear process of the structure with damage by the way of time sequence analysis and the modeling of dynamical data system,respectively.Compared with the two ways of spectrum analysis of the structural physical state and the identification of its modal frequence,the calcaulated shows that the nonlinear SETAR model is more effictive in character spectrum recognition and can reflect more damage information flexisible than the linear ARMAX model and it also confirms that SETAR model is more reseasonable in parameter recognition of data set obtained from the damaged structure.The way of modeling and settling is a promised and prospective course in the field of mathematical modeling in structure damage identification. |
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| Keywords: | parameter recognition structure vibration nonlinearity dynamical data system |
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