Harmony Response Analysis of a Simple Supported Beam Steel Bridge Based on ANSYS

The purpose and meaning of bridge health monitoring is sketched in this paper. In order to study of the structure of the bridge health monitoring problems, First of all, a finite element model for simply supported steel beam is set up on the basis of the Finite Element Theory and the software ANSYS in response to laboratory of the finite Element Theory and the software ANSYS in response to laboratory experient. Identify the different injury by comparing the index value and the rate of change. Through adding instantaneous excitation to the mid-span, do Harmony Response analysis for different injury of steel bridge model to reveal the frequency amplitude diagrams, from these diagrams can be found on the "peak" response. We can identify the different injury by comparing the index value and the rate of change.

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Modal Analysis of a Simple Supported Beam Steel Bridge Based on ANSYS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.594-597.2867 ◽

2012 ◽

Vol 594-597 ◽

pp. 2867-2870

Author(s):

Dong Li Wang ◽

Tong Li ◽

Chun Yu Wang

Keyword(s):

Modal Analysis ◽

Health Monitoring ◽

Element Model ◽

Rate Of Change ◽

Mode Shapes ◽

Steel Bridge ◽

Bridge Health Monitoring ◽

Bridge Model ◽

Set Up ◽

Index Value

The purpose and significance of bridge health monitoring is described in this paper. In order to study bridge health monitoring, Firstly, a finite element model for simply supported steel beam is set up on the basis of the Infinite Element Theory and the software ANSYS in response to laboratory experient. Through adding instantaneous excitation to the mid-span, do modal analysis for different injury of steel bridge model to reveal the natural frequency and mode shapes of the different injury of steel bridges, identify the different injury by comparing the index value and the rate of change.

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Finite element model updating of existing steel bridge based on structural health monitoring

Journal of Central South University of Technology ◽

10.1007/s11771-008-0075-y ◽

2008 ◽

Vol 15 (3) ◽

pp. 399-403 ◽

Cited By ~ 10

Author(s):

Xu-hui He ◽

Zhi-wu Yu ◽

Zheng-qing Chen

Keyword(s):

Finite Element ◽

Structural Health Monitoring ◽

Finite Element Model ◽

Health Monitoring ◽

Model Updating ◽

Element Model ◽

Finite Element Model Updating ◽

Steel Bridge ◽

Structural Health

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Application of Wavelet Transform to Modal Parameter Identification of the Concrete-Filled Steel Tube Arch Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.2446 ◽

2011 ◽

Vol 250-253 ◽

pp. 2446-2450

Author(s):

Wei Huang ◽

Guo Jing He

Keyword(s):

Finite Element ◽

Wavelet Transform ◽

Finite Element Model ◽

Health Monitoring ◽

Dynamic Properties ◽

Element Model ◽

System Response ◽

Response Analysis ◽

Modal Parameter ◽

Transform Method

It’s important to identify structural modal parameter in time and accurately for structural health monitoring and damage identification. Wavelet analysis is one of the various kinds of identification methods, which has been used in linear and nonlinear system response data since it can decompose signals simultaneously both in time-domain and frequency-domain with adaptive windows. In this paper, taking Bariba Bridge as an example, the modal analysis results obtained from the finite element model are compared with those estimated from the wavelet transform method. Good coincidence of results can be observed, which demonstrates that the built-up finite element model reflects the bridge’s real dynamic properties, and can serve as a baseline model for its dynamic response analysis under complicated excitations, long-term health monitoring and structural service state assessment.

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Separation Method of Strain Caused by Concrete Shrinkage and Creep in Bridge Health Monitoring

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.668-669.1421 ◽

2014 ◽

Vol 668-669 ◽

pp. 1421-1425

Author(s):

Ya Feng Gong ◽

Xiao Bo Sun ◽

Xiang Hui Li ◽

Yu Bo Jiao

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Health Monitoring ◽

Field Measurement ◽

Measurement Data ◽

Element Model ◽

Measured Data ◽

Bridge Health Monitoring ◽

Concrete Shrinkage ◽

Shrinkage And Creep

The strain caused by concrete shrinkage and creep is separated through the field measurement data in this paper. Then D62 model and ACI model of finite element model is established to predict shrinkage and creep. Compared with the measured data, the feasibility and practicability of these two models can be proved.

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The Finite Element Analysis and Optimization for the Grinder Based on the Joint Surface

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.281.165 ◽

2013 ◽

Vol 281 ◽

pp. 165-169 ◽

Cited By ~ 1

Author(s):

Xiang Lei Zhang ◽

Bin Yao ◽

Wen Chang Zhao ◽

Ou Yang Kun ◽

Bo Shi Yao

Keyword(s):

Finite Element ◽

Natural Frequency ◽

Element Model ◽

Joint Surface ◽

Weak Links ◽

Response Analysis ◽

Element Analysis ◽

Static And Dynamic Analysis ◽

Harmonic Response Analysis ◽

Grinding Machine

Establish the finite element model for high precision grinding machine which takes joint surface into consideration and then carrys out the static and dynamic analysis of the grinder. After the static analysis, modal analysis and harmonic response analysis, the displacement deformation, stress, natural frequency and vibration mode could be found, which also helps find the weak links out. The improvement scheme which aims to increase the stiffness and precision of the whole machine has proposed to efficiently optimize the grinder. And the first natural frequency of the optimized grinder has increased by 68.19%.

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Design optimization of vehicle asynchronous motors based on fractional harmonic response analysis

Mechanical Sciences ◽

10.5194/ms-12-689-2021 ◽

2021 ◽

Vol 12 (1) ◽

pp. 689-700

Author(s):

Ao Lei ◽

Chuan-Xue Song ◽

Yu-Long Lei ◽

Yao Fu

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Natural Frequency ◽

Asynchronous Motor ◽

Element Model ◽

Design Parameters ◽

Response Analysis ◽

Harmonic Response ◽

First Order ◽

Harmonic Response Analysis

Abstract. To make vehicles more reliable and efficient, many researchers have tried to improve the rotor performance. Although certain achievements have been made, the previous finite element model did not reflect the historical process of the motor rotor well, and the rigidity and mass in rotor optimization are less discussed together. This paper firstly introduces fractional order into a finite element model to conduct the harmonic response analysis. Then, we propose an optimal design framework of a rotor. In the framework, objective functions of rigidity and mass are defined, and the relationship between high rigidity and the first-order frequency is discussed. In order to find the optimal values, an accelerated optimization method based on response surface (ARSO) is proposed to find the suitable design parameters of rigidity and mass. Because the higher rigidity can be transformed into the first-order natural frequency by objective function, this paper analyzes the first-order frequency and mass of a motor rotor in the experiment. The results proved that not only is the fractional model effective, but also the ARSO can optimize the rotor structure. The first-order natural frequency of asynchronous motor rotor is increased by 11.2 %, and the mass is reduced by 13.8 %, which can realize high stiffness and light mass of asynchronous motor rotors.

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Automated finite element model updating of a scale bridge model using measured static and modal test data

Engineering Structures ◽

10.1016/j.engstruct.2015.07.029 ◽

2015 ◽

Vol 102 ◽

pp. 66-79 ◽

Cited By ~ 32

Author(s):

Masoud Sanayei ◽

Ali Khaloo ◽

Mustafa Gul ◽

F. Necati Catbas

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Test Data ◽

Model Updating ◽

Element Model ◽

Finite Element Model Updating ◽

Modal Test ◽

Bridge Model

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Structural Health Monitoring of the Scaffolding Dismantling Process of a Long-Span Steel Box Girder Viaduct Based on BOTDA Technology

Advances in Civil Engineering ◽

10.1155/2019/5942717 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Yong Ding ◽

Feng Xiao ◽

Weiwei Zhu ◽

Tao Xia

Keyword(s):

Health Monitoring ◽

Strain Distribution ◽

Time Domain Analysis ◽

Element Model ◽

Box Girder ◽

Bridge Health Monitoring ◽

Long Span ◽

Steel Box Girder ◽

Optical Time ◽

Distributed Optical Fiber

In this study, a distributed optical fiber sensing technique based on Brillouin optical time-domain analysis (BOTDA) is used to construct a complete bridge health monitoring system by continuously laying distributed sensing fiber lines in a steel box girder. The bridge scaffolding dismantling process is monitored to study the variation of the strain distribution. Additionally, a bridge finite element model is built to simulate the bridge scaffolding removed condition, and the strain distribution of the long-span steel box girder viaduct after scaffolding dismantling is compared with the measured values. This study provides a reference for monitoring the scaffolding dismantling process based on BOTDA technology.

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Analysis of temperature-induced deformation and stress distribution of long-span concrete truss combination arch bridge based on bridge health monitoring data and finite element simulation

International Journal of Distributed Sensor Networks ◽

10.1177/1550147720945205 ◽

2020 ◽

Vol 16 (10) ◽

pp. 155014772094520

Author(s):

Yanwei Niu ◽

Yong’e Wang ◽

Yingying Tang

Keyword(s):

Finite Element ◽

Temperature Distribution ◽

Stress Distribution ◽

Health Monitoring ◽

Three Dimensional ◽

Monitoring Data ◽

Temperature Fields ◽

Structural Deformation ◽

Arch Bridge ◽

Bridge Health Monitoring

Through decades of operation, deformation fluctuation becomes a central problem affecting the normal operating of concrete truss combination arch bridge. In order to clarify the mechanism of temperature-induced deformation and its impact on structural stress distribution, this article reports on the temperature distribution and its effect on the deformation of concrete truss combination arch bridge based on bridge health monitoring on a proto bridge with 138 m main span. The temperature distribution and deformation characteristics of the bridge structure in deep valley area are studied. Both of the daily and yearly temperature variation and structural deformation are studied based on bridge health monitoring. Using the outcome of monitoring data, three-dimensional solid finite element models are established to analyze the mechanism of temperature-induced deformation of the whole bridge under different temperature fields. The influence of temperature-induced effect is discussed on local damage based on the damage observation of the background bridge. The outcome of comparisons with field observation validates the analysis results. The relevant monitoring and simulation result can be referenced for the design and evaluation of similar bridges.

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