中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2011, Vol. 30 ›› Issue (2): 330-333.DOI: 10.3969/j.issn.1674-0696.2011.02.36

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基于不完整频响函数的结构整体状态评估

李柳生,李晓禹   

  1. 江西蓝天学院土木系, 江西南昌330029
  • 收稿日期:2010-04-09 修回日期:2011-02-17 出版日期:2011-04-15 发布日期:2015-03-12
  • 作者简介:李柳生(1983 — ),男,江西吉安人,硕士,国家二级注册结构工程师,主要从事结构损伤识别研究。E-mail:liliusheng2009@163.com。

Structural Integrated State Evaluation Based on Incomplete Frequency Response Function

LI Liusheng, LI Xiaoyu   

  1. School of Civil Engineering, Jiangxi Bluesky University, Nanchang 330013, Jiangxi, China
  • Received:2010-04-09 Revised:2011-02-17 Online:2011-04-15 Published:2015-03-12

摘要: 分析了土木工程结构的有限元模型,推导了损伤判别指标,构建了整体损伤计算方程组;利用最小二乘法求 解得到结构中的各单元损伤状况。利用结构的频响函数图形的偏移程度对结构的损伤进行定性判定;通过不完整 频响函数建立损伤识别指标对损伤位置进行识别;构建了损伤定量计算方程组;利用最小二乘法求解该方程组,并 对损伤程度进行评估。仿真结果表明:提出的损伤整体识别方法对结构损伤探测的评估能得到比较满意的结果。

关键词: 频响函数, 损伤识别, 定性, 定位, 定量, 最小二乘法

Abstract: Finite element model of civil engineering structure was analyzed; damage index was deduced; equations to calculate the damage weve built; dam age of each unit of the structure was obtained through the least square method. Offset level of graphics of frequency response function was employed to determine structural damage; damage location was identified by damage index based on incomplete FRF; calculation equations of damage quantitative were established; damage degree was assessed by the least square. The simulation results demonstrated that the integrated state evaluation could better assess structural damage.

Key words: frequency response function, damage identification, qualitative, localization, quantitative, the least square method

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