Study on Damage Identification of Simple Beam Bridge Based on the First-Order Curvature Mode Ratio

2014 ◽  
Vol 578-579 ◽  
pp. 1032-1036
Author(s):  
Yong Qin
Keyword(s):  
Numerical Simulation ◽  
Damage Identification ◽  
Simulation Analysis ◽  
Reference Value ◽  
Index Method ◽  
Structure Damage ◽  
First Order ◽  
Damage Degree ◽  
Practical Engineering ◽  
Beam Bridge

Starting with damage identification index method on the basis of the curvature mode, the first-order curvature mode ratio is proposed, and then it is made a numerical simulation analysis for a single span simple beam bridge with ANSYS. The identification of structure damage degree under the damage on the single position is studied. The fitted polynomial based on the derivation of the first-order curvature mode ratio can estimate the damage degree; it has a good reference value for the damage detection of structures in practical engineering.

scholarly journals Damage Identification of Plate Structure Based on the Method of Modal Flexibility Curvature Difference

2019 ◽  
Vol 256 ◽  
pp. 02015
Author(s):  
Jiangang Zhao ◽  
Yuxiang Zhang ◽  
Jiazhao Chen
Keyword(s):  
Numerical Analysis ◽  
Lower Order ◽  
Damage Identification ◽  
Higher Order ◽  
Plate Structure ◽  
First Order ◽  
Flexibility Matrix ◽  
Damage Degree ◽  
Higher Order Modes ◽  
Modal Flexibility

According to the higher order modes of the structure are difficult to extract and the lower order are easy to obtain in practice, it is put forward that only uses the parameters of lower or first-order modal to constitute the modal flexibility curvature difference (MFCD) as the index of damage identification, which based on the flexibility matrix of structure being sensitive to the structure modal characteristics. Numerical analysis is made on different damage conditions of a plate structure, and the result shows that the MFCD can not only accurately identify the single-damage and multi-damage position of plate structure, but also reflect the size of damage degree. It has a great significance to apply the index into the range of damage identification of actual structures.

Structural Analysis of the Shallow-Buried Station by Using Load Structure Method

2012 ◽  
Vol 204-208 ◽  
pp. 881-884
Author(s):  
Yong Shuai Cao ◽  
Yong Sheng Zhang
Keyword(s):  
Structural Analysis ◽  
Engineering Design ◽  
Simulation Analysis ◽  
Reference Value ◽  
Subway Station ◽  
Analysis Tool ◽  
Main Structure ◽  
Its Analysis ◽  
Practical Engineering ◽  
The Common

Aiming at a practical engineering case of a subway station, the paper uses the common software ANSYS as its analysis tool and uses the load structure method to do simulation analysis on the station's main structure. The results indicate that this method is practicable and has certain reference value for engineering design.

The Feasibility Study of Vibration Transmissibility Applied to Structure Damage Identification

2013 ◽  
Vol 347-350 ◽  
pp. 107-110
Author(s):  
Sen Wu ◽  
Bin Wang ◽  
Hai Hua Zhang
Keyword(s):  
Numerical Simulation ◽  
Cantilever Beam ◽  
Feasibility Study ◽  
Structural Damage ◽  
Simulation Experiment ◽  
Damage Identification ◽  
Structure Damage ◽  
Damage Location ◽  
Identification Method ◽  
Vibration Transmissibility

In view of the defects of the traditional damage identification method based on vibration,the damage identification method based on vibration transmissibility is put forward. The feasibility of the vibration transmissibility applied to structural damage identification is analyzed by the numerical simulation experiment of a cantilever beam, the analysis results show that, vibration transmissibility contains the structure damage severity, damage location and other useful information, and all the information is favor of the damage identification.

Numerical Simulation and Experimental Study of Static Driven Short Piles in the Dualistic Structure Stratum

2011 ◽  
Vol 55-57 ◽  
pp. 193-196
Author(s):  
Xin Gui Zhang ◽  
Xiang Gang Kong ◽  
Zhen Song
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Pile Foundation ◽  
Simulation Analysis ◽  
Measured Data ◽  
Vertical Load ◽  
Finite Element Software ◽  
Practical Engineering ◽  
Load Action ◽  
Dualistic Structure

In this paper, based on measured data of practical engineering, the characters of single short pile under the static vertical load action in the normal stratum combination model of dualistic structure has been simulated by using ABAQUS finite element software. Then simulated result and measured one has been compared and analyzed carefully. The analysis result indicated the applicability and reliability of ABAQUS finite element software in the simulation analysis of short pile. All these can provide some theoretical reference for design of short pile foundation.

scholarly journals Research on Damage Identification of Grid Structure Based on Genetic Algorithm

2019 ◽  
Vol 136 ◽  
pp. 03014
Author(s):  
Yu Wang ◽  
Menghong Wang ◽  
Huan Lu
Keyword(s):  
Numerical Simulation ◽  
Genetic Algorithm ◽  
Damage Identification ◽  
Simulation Analysis ◽  
Fitness Function ◽  
Reduction Factor ◽  
Grid Structure ◽  
Identification Method ◽  
Stiffness Reduction ◽  
Mutation Operators

This paper proposes a genetic algorithm based damage identification method for grid structures. The genetic algorithm is used to process the modal information of the structure, and the damage identification of the truss structure is carried out. The stiffness reduction factor of the structural member is used as the optimization variable. The objective function is constructed according to the frequency and vibration mode, and the fitness function is established. The binary coding method is used to improve the crossover and mutation operators. In this paper, a grid structure model is used for numerical simulation analysis and verified by experiments. In the experimental stage, the grid structure is excited by hammering method, and the response data of each node and the modal information of the structure are obtained. Numerical simulation and experimental analysis show that the damage identification method based on genetic algorithm can effectively judge the location and extent of damage.

Numerical Simulation Analysis on Repairing Hole of UAV Wing

2013 ◽  
Vol 690-693 ◽  
pp. 2891-2895
Author(s):  
Guo Dong Jin ◽  
Li Bin Lu ◽  
Liang Xian Gu ◽  
Juan Liang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Service Life ◽  
Simulation Analysis ◽  
High Stress ◽  
Reference Value ◽  
Safety Standards ◽  
Aerial Vehicle ◽  
Element Method

Parachute recovery of UAV is often caused of holes and other injuries on wings, that are required repair and maintenance. The surface of the patch will form the high stress area, that affects UAV using life and safety .But repair method is good or bad directly affects size of the high stress area. Based on finite element method, the broken hole repairing method was formulated and validated by ANSYS. The method could minimize the high stress area as far as possible, and economically repair broken hole of wing in certain precision and safety standards condition. It has a certain reference value for UAV repair and management, and has reference significance for extending the service life of the UAV. Key words: Finite element method; Unmanned Aerial Vehicle (UAV); Simulation; Hole of wings

Design of Virtual Prototype for Cold Roll Forming Machine of Side Panel of Engineering Vehicles and Numerical Simulation of the Forming Process

2013 ◽  
Vol 753-755 ◽  
pp. 159-162
Author(s):  
Qiu Bo Huang ◽  
Jun Rui Song ◽  
Qing Bo Yang
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Reference Value ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Side Plate ◽  
Pass System ◽  
Cold Roll ◽  
Solid Works

In this paper, based on the engineering vehicle’s side plate cold roll forming machine developed by a company, we use 3D solid modeling software Solid Works to complete the establishment of a 3D model. On the basis of explicit dynamics elastoplastic finite element method basic theory, we make numerical simulation analysis of the metal plate’s forming process by using ANSYS/LS-DYNA module. According to the simulation results, we make repeated adjustment and optimization on its pass system and parameters. Through the numerical simulation of the forming process, we conclude the stress-strain distribution of the sheet metal. For similar products, the result has a certain reference value to the research of cold roll forming process and the design of cold roll forming equipments.

Study on Engineering Materials with the Comparison and Discussion of Support Scheme in a Foundation Pit

2013 ◽  
Vol 788 ◽  
pp. 623-626
Author(s):  
Zheng Zhen ◽  
Ren Wang Liang
Keyword(s):  
Numerical Simulation ◽  
Shear Force ◽  
Simulation Analysis ◽  
Bending Moment ◽  
Engineering Material ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Cost Performance ◽  
Deep Foundation Pit ◽  
Practical Engineering

Taking a deep foundation pit engineering in Taiyuan as research background, this paper used two different supporting structure of foundation pit to make numerical simulation analysis by using Li zheng software. The engineering material had high cost performance. In addition, the paper studied the displacement, bending moment, shear force with the change of the excavation depth, and it came to the conclusion that some outcome can be used for reference in the practical engineering.

Finite Element Analysis on the Directly Buried Heating Bent Pipeline with Many Break Angles

2013 ◽  
Vol 842 ◽  
pp. 415-419
Author(s):  
Bao Xian Qian ◽  
Fei Wang ◽  
Guo Wei Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Design Method ◽  
Engineering Practice ◽  
Analysis Method ◽  
Element Analysis ◽  
Current Design ◽  
Practical Engineering

In order to get the optimal design scheme of a directly buried heating bent pipeline with many fold angles in a certain practical engineering, this paper simulated the pipeline by the ANSYS finite element analysis software.Through applying different boundary conditions to the model, the stress was analyzed, the destroy forms of the pipeline and the positions of stress danger points were determined,and the fatigue life was checked according to BS EN. Compared with the current design method,adopting numerical simulation analysis method has greatly reduced the number of the usage of compensators and fixed piers, broke through the restrictions for larger fold angle in the standard,and at the same time, it has reduced the construction difficulties and the engineering investment,improved the reliability of the network,this paper has guiding significance to the engineering practice.

Damage Identification Method of Simply Supported Beam Bridge with Multiple Girders

2013 ◽  
Vol 437 ◽  
pp. 377-381
Author(s):  
Ping Yi Sun ◽  
Yan Hua Wang ◽  
Yan Feng Niu ◽  
Han Bing Liu ◽  
Guo Jin Tan
Keyword(s):  
Numerical Simulation ◽  
Damage Identification ◽  
Identification Algorithm ◽  
Damage State ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Svm Algorithm ◽  
Damage Extent ◽  
Beam Bridge ◽  
T Beam

Considering the complexity of the simply supported beam with multiple girders, a two-step damage identification algorithm for this kind of bridge is presented. This algorithm first locates the damage by means of curvature of flexibility change, and then utilizes the PSO-SVM algorithm to identify the damage extent. At last, a numerical simulation calculation is conducted to identify the damage state of a simply supported T-beam bridge with five girders. The numerical simulation results show that the algorithm proposed is valid, reliable and with high recognition precision.

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