Damage Identification of Arch Bridge Based on Curvature Mode Wavelet Analysis

Based on the curvature modal damage identification of wavelet analysis principle, the finite element method was applied to analyze the vibration characteristics of the damaged deck arch bridge. Take Haar wavelet as the mother wavelet, through the continuous wavelet transform of curvature mode and then identified the damaged position by the maximum of wavelet coefficients. analyze the damage identification problem under three different damaged conditions (condition 1: only the arch 1 contained one damaged location; condition 2: the arch 1 and the arch 2 contained one damaged location respectively; condition 3: the arch 1 contained two damaged locations and the arch 2 contained one damaged location).This paper provided a valuable reference of damage identification and diagnosis for arch bridge.

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Damage Identification for Curl Tube Structure Based on Modal Flexibility Curvature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.2151 ◽

2012 ◽

Vol 490-495 ◽

pp. 2151-2155

Author(s):

Yong Jun Li ◽

Li Yuan Ma ◽

Tian Hui Wang

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Damage Identification ◽

Vertical Plane ◽

The Finite Element Method ◽

Central Difference ◽

Damage Location ◽

Modal Flexibility ◽

Central Difference Method ◽

Tube Structure

To detect the damage of curl tube structure with more effect, the finite element method (FEM) and experimental modal analysis (EMA) were employeed to generate the modal flexibility of the curl tube. The modal flexibility was used to compute the modal flexibility-curvature by using the central difference method. Different degrees and locations of damage were simulated by additional quality in the intact curl tube to verify the modal flexibility-curvature and difference generated by both FEM and EMA. The results show that the modal flexibility of curl tube should have the direction. In addition, we conclude that the flexibility curvature’s difference in x and y plane can not be used for damage identification. But using the flexibility curvature’s difference of the z direction in the vertical plane, we can not only identified the multiple damage location, but also to analized degree for the extent of injury to the same location .

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Modal analysis of delaminated composite plates using the finite element method and damage detection via combined Ritz/2D-wavelet analysis

Journal of Sound and Vibration ◽

10.1016/j.jsv.2013.01.012 ◽

2013 ◽

Vol 332 (12) ◽

pp. 2971-2983 ◽

Cited By ~ 13

Author(s):

A. Gallego ◽

P. Moreno-García ◽

Cesar F. Casanova

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Wavelet Analysis ◽

Damage Detection ◽

Modal Analysis ◽

Composite Plates ◽

The Finite Element Method ◽

Element Method

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Model Test Study on a Single Diagonal-Span Arch Bridge with Curved Beam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.44-47.2031 ◽

2010 ◽

Vol 44-47 ◽

pp. 2031-2035

Author(s):

Qian Wang ◽

Lei Shi ◽

Zhe Zhang

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Model Test ◽

Structural Design ◽

Test Method ◽

Curved Beam ◽

The Finite Element Method ◽

Special Shape ◽

Arch Bridge ◽

Test Study

Tong-Tai Bridge is a special-shape arch bridge with arch obliquely cross the curved beam. In order to validate the theoretical solutions and ensure the structure safety, model test is discussed. In this paper, the structural design, fabrication procedures and test method of the model are presented. Meanwhile, the finite element method is applied to analyses this special structure. Some experience of the structure construction is obtained during the practice process and the experimental results achieved are satisfactory.

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Damage Identification of Elastic Plate Based on Strain Mode Wavelet Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.4078 ◽

2011 ◽

Vol 71-78 ◽

pp. 4078-4081

Author(s):

De Qing Guan ◽

Hong Wei Ying ◽

Xiao Lin Zhong

Keyword(s):

Finite Element Method ◽

Wavelet Analysis ◽

Elastic Plate ◽

Damage Identification ◽

The Finite Element Method ◽

Strain Mode ◽

Simply Supported ◽

Analysis Theory ◽

Mexican Hat Wavelet ◽

Mexican Hat

By means of the wavelet analysis theory, the damage identification of elastic plate was studied. Adopted the finite element method to analyze the dynamic character of the plate and applied the method of Lanczos for calculating the strain mode, and the strain mode is analyzed by mexh wavelet (Mexican Hat wavelet). The location of the declining stiffness is identified by the place where maximum of wavelet coefficients appears. Therefore, this method is applied to the elastic damaged plate. Three types of damaged regions in rectangular simply supported plate are recognized, which indicates this method is effective and accurate. And this method has a certain value in the project application.

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Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽

10.1039/c9nr06508c ◽

2019 ◽

Vol 11 (43) ◽

pp. 20868-20875 ◽

Cited By ~ 1

Author(s):

Junxiong Guo ◽

Yu Liu ◽

Yuan Lin ◽

Yu Tian ◽

Jinxing Zhang ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Interfacial Effect ◽

Infrared Photodetector ◽

The Finite Element Method ◽

Ferroelectric Domains ◽

Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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