基于小波相关性的简支梁桥损伤评估方法

闫宇智1,战家旺1,张楠1,夏禾1,李明1,胡所亭2

振动与冲击 ›› 2018, Vol. 37 ›› Issue (12) : 67-74.

PDF(1390 KB)
PDF(1390 KB)
振动与冲击 ›› 2018, Vol. 37 ›› Issue (12) : 67-74.
论文

基于小波相关性的简支梁桥损伤评估方法

  • 闫宇智1,战家旺1,张楠1,夏禾1,李明1,胡所亭2
作者信息 +

A damage evaluation method for simplysupported bridges based on wavelet transform correlation#br#

  • YAN Yuzhi1,ZHAN Jiawang1,ZHANG Nan1,XIA He1,LI Ming1,HU Suoting2
Author information +
文章历史 +

摘要

以移动荷载作用下桥梁位移响应的小波相关性构造目标函数,减少待识别参数,提出了一种基于有限元模型修正理论的简支梁桥损伤分步评估方法,并采用该方法对一简支钢梁数值模型的损伤进行识别。识别结果表明:所提方法仅需布置一个位移测点即可对不同位置和程度的损伤进行定量识别,迭代效率高;移动荷载速度、大小和测点位置对损伤的定量识别效果影响较小,且具有较强的抗噪能力;在实际桥梁测试中,采用桥梁损伤边界逼近识别方法可以实现对损伤位置的逐步逼近和损伤程度的精细化识别。

Abstract

A substep method based on the FE model updating technique was proposed for the damage evaluation of simplysupported bridges. In the method, the wavelet transform correlation of the bridge displacement response under moving loads were taken as the objective function, and it reduced the parameters to be identified. A numerical example of a simplysupported steel beam model indicates that the proposed method can quantitatively identify the damage of different positions and degrees with only one displacement measuring point. The load velocity, load value and the location of measuring points have little influence on the quantitative identification of the damage, and the method has strong antinoise ability. The damage boundary approach method can be used to approach the true damage locations and identify the damage extents precisely.
 

关键词

简支梁桥 / 小波相关性 / 模型修正 / 定量评估 / 移动荷载

Key words

simply-supported bridge / wavelet transform correlation / FE model updating / quantitative evaluation / moving loads

引用本文

导出引用
闫宇智1,战家旺1,张楠1,夏禾1,李明1,胡所亭2. 基于小波相关性的简支梁桥损伤评估方法[J]. 振动与冲击, 2018, 37(12): 67-74
YAN Yuzhi1,ZHAN Jiawang1,ZHANG Nan1,XIA He1,LI Ming1,HU Suoting2. A damage evaluation method for simplysupported bridges based on wavelet transform correlation#br#[J]. Journal of Vibration and Shock, 2018, 37(12): 67-74

参考文献

[1] 吉伯海, 傅中秋. 近年国内桥梁倒塌事故原因分析[J]. 土木工程学报, 2010, 43卷增刊:495-498
Ji Bohai, Fu Zhongqiu. Analysis of Chinese Bridge Collapse Accident Causes in Recent Years [J]. China Civil Engineering Journal, 2010, 43: 495-498 (in Chinese)
[2] Peeters B. System Identification and damage detection in civil engineering [D].Catholic University of Leuven, 2000.
[3] L.J.Jiang,J.Tang,K.W.Wang.An Optimal Sensitivity-enhancing Feedback Control Approach via Eigenstructure Assignment for Structural Damage Identification[J]. Journal of Vibration and Acoustics,2007,129:771-783.
[4] Ricardo Perera, Antonio Ruiz. A Multistage FE Updating Procedure for Damage Identification in Large-scale Structures Based on Multi Objective Evolutionary Optimization[J]. Mechanical Systems and Signal Processing,2008,22:970-991.
[5] 赵俊,张伟伟,马宏伟. 移动荷载作用下简支梁的动态影像及裂纹损伤识别研究[J]. 振动与冲击,2011,30(6):97-103.
ZHAO Jun, ZHANG Weiwei, MA Hongwei. Dynamic Response and Crack Detection of Simply Supported Beam under Moving Loads[J]. Journal of Vibration and Shock, 2011,30(6):97-103.
[6] 余竹,夏禾,殷永高等. 基于小波变换与Lipschitz指数的桥梁损伤识别研究[J]. 振动与冲击,2015,34(14):65-69.
YU Zhu, XIA He, YIN Yonggao. Bridge Damage Identification Based on Wavelet Transform and Lipschitz Exponent[J]. Journal of Vibration and Shock, 2015,34(14):65-69.
[7] Chang C, Chen L. Vibration Damage Detection of a Timoshenko Beam by Spatial Wavelet Based Approach[J].Applied Acoustics,2003,64:1217-
1240.
[8] 任东华. 基于模态参数小波变换的铁路桥墩损伤识别方法及试验研究[D]. 中国铁道科学研REN Donghua. Experimental and Method Study on Damage Identification of Railway Piers Based on Modal Characteristics and Wavelet Transform[D]. China Academy of Railway Sciences,2014.
[9] 战家旺,王伟,张楠等. 基于模型修正理论的铁路桥墩损伤定量评估方法[J]. 中国铁道科学, 2015,36(5):28-35.
ZHAN Jiawang, WANG Wei, ZHANG Nan. Quantitative Damage Evaluation Method for Railway Piers Based on Model Updating Theory[J]. China Railway Science, 2015,36(5):28
-35.
[10] 杨雅勋. 基于动力测试的桥梁结构损伤识别与综合评估理论研究[D]. 长安大学,2008.
YANG Yaxun. Bridge Structure Damage Identification Research Based on the Dynamic Testing and the Research of Bridge Comprehensive Evaluation Theory[D]. Chang’an University,2008.
[11] 余竹. 基于移动荷载作用下结构响应及小波分析的桥梁损伤诊断研究[D]. 北京交通大学,2014.
YU Zhu. Research on Bridge Damage Detection Dased on Moving Load Induced Structural Response and Wavelet Analysis[D]. Beijing Jiaotong University,2014.
[12] 任宜春,马石城,林琳. 移动荷载作用下梁裂缝识别的小波方法研究[J]. 振动与冲击,2004,23(2):82-85.
REN Yichun, MA Shicheng, LIN Lin. Identification of Simple-supported Beam Cracks by Means of Wavelet Analysis[J]. Journal of Vibration and Shock, 2004,23(2):82-85.

PDF(1390 KB)

423

Accesses

0

Citation

Detail

段落导航
相关文章

/