| 桁架结构损伤识别的最小秩方法 |
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| 引用本文： | 朱子,曹申. 桁架结构损伤识别的最小秩方法[J]. 河北工程大学学报(自然科学版), 2006, 23(3): 7-10 |
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| 作者姓名： | 朱子 曹申 |
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| 作者单位： | 清华大学,土木工程系,北京,100084;清华大学,土木工程系,北京,100084 |
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| 基金项目： | 教育部跨世纪人才基金及863计划(2002AA615110)资助课题 |
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| 摘 要： | 在结构损伤的早期阶段,损伤往往集中发生在少数单元,损伤前后总体刚度矩阵差的秩较小。本文给出一种基于矩阵最小秩理论的计算方法,对损伤结构的模态力余量方程进行求解,反演得到总体刚度矩阵的变化量。数值试验表明,该方法对桁架结构的损伤可进行精确的定位和标定。
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| 关 键 词： | 最小秩理论 模态力余量 损伤定位 损伤程度标定 |
| 文章编号： | 1007-6743(2006)03-0007-04 |
| 修稿时间： | 2006-03-30 |
Damage identification of truss structures using a minimum rank method |
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| ZHU Zi,CAO Shen. Damage identification of truss structures using a minimum rank method[J]. Journal of Hebei University of Engineering(Natural Science Edition), 2006, 23(3): 7-10 |
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| Authors: | ZHU Zi CAO Shen |
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| Abstract: | Damage tends to be concentrated in a few structural members at the early stage,so the stiffness perturbation matrix tend to be in small rank.A damage identification method of truss structures using a minimum rank theory is presented.Numerical results show that the method can localize and quantify the damage in truss structures precisely. |
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| Keywords: | minimum rank theory modal force error damage localization damage severity quantification |
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