基于间接法识别的桥梁振型的损伤定位方法

PDF(1259 KB)

振动与冲击 ›› 2018, Vol. 37 ›› Issue (24) : 13-17.

论文

基于间接法识别的桥梁振型的损伤定位方法

贺文宇，何健，任伟新

作者信息 +

A damage localization method based on indirectly identified mode shapes

HE Wenyu,HE Jian,REN Weixin

Author information +

文章历史 +

摘要

基于模态振型曲率变化的损伤定位法具有原理简单、结果直观、效率较高的优点，但其对高空间分辨率和基准振型的需求及中心差分法导致的低抗噪性，极大的限制了其应用范围。提出了一种基于间接法识别的桥梁振型的损伤定位指标。首先，利用希尔伯特变换从移动车辆响应中提取出高空间分辨率的损伤桥梁振型；然后采用区域振型曲率替代传统的振型曲率，多项式拟合估计未损桥梁的振型信息，综合有损与无损的区域振型曲率定义损伤定位指标；最后通过数值算例验证了所提出指标的有效性，并探讨了测试噪声、路面粗糙度等对定位精度的影响。

Abstract

Mode shape curvature change based damage localization methods possess the advantages of simple principle, intuitive results, and high efficiency.However, their application is limited by the requirement for high spatial resolution and reference mode shapes, and the central difference induced low anti-noise ability.This paper develops a new damage localization index (DLI) by using indirectly identified mode shapes.Firstly, the high spatial resolution mode shape in a damaged state was extracted from the moving vehicle response via the Hilbert transform.Then regional mode shape curvature (RMSC) was defined, and the mode shape information in an undamaged state was estimated by polynomial approximation.Finally, a DLI was formulated based on RMSC before and after damage to localized damage.Numerical studies were conducted to examine the effect of noise, and road roughness on the accuracy of the proposed DLI.

导出引用

贺文宇，何健，任伟新. 基于间接法识别的桥梁振型的损伤定位方法[J]. 振动与冲击, 2018, 37(24): 13-17

HE Wenyu,HE Jian,REN Weixin. A damage localization method based on indirectly identified mode shapes[J]. Journal of Vibration and Shock, 2018, 37(24): 13-17

参考文献

[1] Doebling S W, Farrar C R and Prime M B. A summary review of vibration-based damage identification methods [J]. Shock and Vibration Digest, 1998, 30(2): 91-105.
[2] Ren W X and Roeck G D. Structural damage identification using modal data. I: simulation verification [J]. Journal of Structural Engineering, 2002a, ASCE 128(1): 87-95.
[3] Pandey A K, Biswas M and Samman M M. Damage detection from changes in curvature mode shapes [J]. Journal of Sound and Vibration, 1991, 145(2): 321-332.
[4] Zhu X Q and Law S S. Wavelet-based crack identification of bridge beam from operational deflection time history [J]. International Journal of Solids and Structures, 2006, 43: 2299-2317.
[5] Yang Y B, Lin C W and Yau J D. Extracting bridge frequencies from the dynamic response of a passing vehicle [J]. Journal of Sound and Vibration, 2004, 272: 471-493.
[6] Yang Y B, Li Y C and Chang K C. Constructing the mode shapes of a bridge from a passing vehicle: a theoretical study [J]. Smart Structures and Systems, 2014, 13(5): 797-819.
[7] Qi Z Q and Au FTK. Identifying mode shapes of girder bridges using dynamic responses extracted from a moving vehicle under impact excitation [J]. International Journal of Structural Stability and Dynamics, 2017, 17(8): 1750081.
[8] Zhang Y, Lie T and Xiang Z. Damage detection method based on operating detection shape curvature extracted from dynamic response of a passing vehicle [J]. Mechanical Systems and Signal Processing, 2013, 35: 238-254.
[9]安宁. 基于列车—桥梁耦合振动响应的桥梁损伤识别方法研究[D]. 北京：北京交通大学，2013.
AN Ning. Research on damage detection techniques based on coupled vehicle-bridge vibration responses [D]. Beijing: Beijing Jiaotong University, 2013.
[10]贾宝玉龙. 梁式结构基于间接测量法的损伤识别方法研究[D]. 重庆：重庆大学，2016.
JIA Bao-yu-long. Reasearch on detection of beam-type structure by using bridge indirect measurement method [D]. Chongqing: Chongqing University, 2016.
[11]阳洋,周锡元,金国芳,刘荷.框架结构基于改进直接刚度法的地震损伤评估[J]. 振动与冲击. 2011, 30(02): 199-204
Yang Yang, Zhou Xi-yuan, Jin Guo-fang, Liu He. Modified direct stiffness calculation method for seismic damage assessment of frame structures [J]. Journal of Vibration and Shock. 2011, 30(02): 199-204
[12]李小珍，张黎明，张洁. 公路桥梁与车桥耦合振动研究现状与发展趋势[J]. 工程力学, 2008, 25(3): 230-240.
Li Xiao-zhen, Zhang Li-ming, Zhang Jie. State-of-the-art review and trend of studies on coupling vibration for vehicle and higway bridge system [J]. Engineering Mechanics, 2008, 25(3): 230-240.
[13] Wahab MMA and Roeck G D. Damage detection in bridges using modal curvatures: application to a real damage scenario [J]. Journal of Sound and Vibration, 1999, 266(2): 217-235.
[14] ISO 8608, Mechanical vibration-road surface profiles - Reporting of measured data, Geneva, Switherland, 1996.
[15] Keenahan J, OBrien E J and McGetrick PJ et al. The use of a dynamic truck- trailer drive-by system to monitor bridge damping [J]. Structural Health Monitoring, 2014, 13(2): 143- 157.