Dynamic Performance Analysis for a Butterfly-Shaped Arch Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 74-78
Author(s):  
Hai Yun Huang ◽  
Xiang Rong Yuan ◽  
Ka Hong Cai
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Element Model ◽  
Loading Test ◽  
Structural Dynamic ◽  
Arch Bridge ◽  
Calculation Results ◽  
Dynamic Performance Analysis

The dynamic characteristics are not only the important indexes for evaluating the bridge structural rigidity, but also the principal parameters for structural dynamic analysis and earthquake resistant analysis. In this paper, a three dimensional solid finite element model for a butterfly-shape arch bridge in Zhongshan city was established to analyze the dynamic characteristics. By comparison the numerical calculation results with measured results of the dynamic loading test, an analysis and evaluation of the dynamic performance of this new type spatial arch bridge was made, and can serve as reference to the dynamic analysis and seismic design of similar bridges.

Deicing Excitation Simulation and Structural Dynamic Analysis of the Electro-Impulse Deicing System

2011 ◽  
Vol 66-68 ◽  
pp. 390-395 ◽  
Author(s):  
Qing Ying Li ◽  
Tian Bai ◽  
Chun Ling Zhu
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Field Analysis ◽  
Post Processing ◽  
Analysis Model ◽  
Structural Dynamic ◽  
Dynamic Finite Element ◽  
Ice Failure

A two-dimensional electromagnetic eddy current field analysis model of the experimental electro-impulse deicing system (EIDI) is developed. Additionally, a numerical post-processing method is proposed to calculate the deicing excitation exerting on the testing skin. Moreover, a three-dimensional dynamic analysis finite element model of the testing skin loaded the excitation is built for evaluating the response accelerations. Then, the calculated accelerations are compared with the experimental measured data to validate the correctness of the proposed methods. It is obtained that the results agree well, which indicates that it is feasible to use the method of post-processing pressure distribution for solving the deicing excitation and the method of structural dynamic finite element analyzing the testing skin for simulating dynamic response. The presented methods pave a way for ice failure analysis of the EIDI system.

Based on Concept of Generalized Instantaneous Space of Dynamic Performance Analysis

2014 ◽  
Vol 672-674 ◽  
pp. 1540-1544
Author(s):  
Ao Xiang Liu ◽  
Jun Wang ◽  
Jun Xian Kang ◽  
Qiang Zhang ◽  
Jun Sun ◽  
...  
Keyword(s):  
Modal Analysis ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Element Model ◽  
Response Analysis ◽  
Response Curves ◽  
Harmonic Response ◽  
Harmonic Response Analysis ◽  
Specific Material ◽  
Dynamic Performance Analysis

TX1600 boring and milling machining center milling part was studied. The Three-dimensional solid model was established based on Solidworks. Simultaneously, modal analysis was carried out by ANSYS Workbench software, the first six natural frequencies and corresponding modes were acquired. Based on the modal analysis, the harmonic response analysis of milling part was conducted,and the response curves of the three main motion orientation were obtained respectively, the vibration performance of milling part under forces was further explored,and the finite element model was validated. The feasibility of the model to simplify the program was verified by modal and harmonic response analysis. The study provides a good basis in terms of selecting a specific material. The structures and material are optimized. Ultimately, a lot of energy is saved.

Dynamic Performance Analysis of Single Tower Self-Anchored Suspension Bridge Using Measured Modal Identification

2012 ◽  
Vol 256-259 ◽  
pp. 1557-1562
Author(s):  
Zhi Guo Ma ◽  
Zhi Jun Li ◽  
Yi Huan Zhu ◽  
Xiao Wen Zhu
Keyword(s):  
Dynamic Performance ◽  
Three Dimensional ◽  
Joint Stiffness ◽  
Suspension Bridge ◽  
Element Model ◽  
Modal Identification ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Dynamic Performance Analysis ◽  
Suspension Structure

Recent years, Single tower self-anchored suspension structure system is more available around us. The research on dynamic characteristic types of structures is an example Nanjing Jiangxin-island Bridge, together with its field modal test and calculated value from a three-dimensional finite element model which focuses on the boundary sensitivity impact to dynamic characteristics of such bridges. The results show that, larger error appears when we do not consider expansion joint stiffness and bearing friction force relative to measured value, so this phenomenon should have to be considered. The conclusions provide important research basis for design and health monitoring of the bridge.

Finite Element Analysis and Optimization of Long-Span Gantry NC Machining Center Structure

2011 ◽  
Vol 346 ◽  
pp. 379-384
Author(s):  
Shu Bo Xu ◽  
Yang Xi ◽  
Cai Nian Jing ◽  
Ke Ke Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Dynamic Performance ◽  
Plate Thickness ◽  
Element Model ◽  
Wall Structure ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Dynamic Performance Analysis

The use of finite element theory and modal analysis theory, the structure of the machine static and dynamic performance analysis and prediction using optimal design method for optimization, the new machine to improve job performance, improve processing accuracy, shorten the development cycle and enhance the competitiveness of products is very important. Selected for three-dimensional CAD modeling software-UG NX4.0 and finite element analysis software-ANSYS to set up the structure of the beam finite element model, and then post on the overall structure of the static and dynamic characteristic analysis, on the basis of optimized static and dynamic performance is more superior double wall structure of the beam. And by changing the wall thickness and the thickness of the inner wall, as well as the reinforcement plate thickness overall sensitivity analysis shows that changes in these three parameters on the dynamic characteristics of post impact. Application of topology optimization methods, determine the optimal structure of the beam ultimately.

Discussion and Dynamic Characteristics of the Offshore Jacket Structure

2014 ◽  
Vol 638-640 ◽  
pp. 322-325
Author(s):  
Yue Zhao ◽  
Duan Duan Zhao ◽  
Qin Han Jiang
Keyword(s):  
Dynamic Characteristics ◽  
Random Vibration ◽  
Dynamic Performance ◽  
Power Spectrum Analysis ◽  
Fatigue Properties ◽  
Connection Form ◽  
The Finite Element Method ◽  
Research Focus ◽  
Calculation Results ◽  
Connection Type

In this paper, based on the finite element method, the K type common jacket structure connection in the form of positive connection and reverse connection conditions is being do comparative analysis. Research focus on dynamic characteristics, including of power spectrum analysis under the action of random vibration and fatigue properties of two kinds of connection type structure. The calculation results show: the inverted K type connection of jacket structure is about 10% increase in the stiffness and the dynamic performance, the inverted K type connection form is more worthy of popularization and application in engineering.

Finite-Infinite Element Dynamic Analysis of Pile-Soil-Structure System Considering the Change of Groundwater Level

2011 ◽  
Vol 250-253 ◽  
pp. 2291-2295
Author(s):  
Wei Hu ◽  
Guang Fan Li ◽  
Juan Du
Keyword(s):  
Dynamic Characteristics ◽  
Groundwater Level ◽  
Soil Structure ◽  
Horizontal Displacement ◽  
Element Model ◽  
Geological Condition ◽  
Shearing Stress ◽  
Structural Dynamic ◽  
Structure System ◽  
Infinite Element

The rise of groundwater level can reduce soil’s effective stress and destroy it’s structure. As a result, the dynamic characteristics of pile-soil-structure system will be changed remarkably. In this paper, a structural dynamic model was used for saturated loess, and the finite-infinite element model of pile-soil-structure system was established to study the groundwater level’s influence on the system’s dynamic characteristics, which included the distributions of pile section’s shearing stress, horizontal displacement and acceleration. The results indicated that, the height of groundwater level did not change the distribution shapes of shearing stress, horizontal acceleration, but had effect on their values. To the top section’s shearing stress and horizontal displacement, there almost had a same dividing groundwater level. When groundwater level was higher than that one, the shearing stress and horizontal displacement were increasing with the rising of groundwater level, but the regulations were just opposite when groundwater level under that height. The study also shown that, to a determinate geological condition and pile foundation, there has a dividing groundwater level, and which is also the most secure level to the pile-soil-structure system. The conclusion can give theoretic instruction for the safety evaluation of pile-soil-structure system around water area.

Analysis of Bridge Pier’s Dynamic Characteristics Considering Fluid-Solid Interface Coupling

2014 ◽  
Vol 1049-1050 ◽  
pp. 464-468
Author(s):  
Chen Hui Jin ◽  
Bo Ming Zhao ◽  
Run Bo Bai
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Great Influence ◽  
Water Structure ◽  
Natural Vibration Frequency ◽  
Finite Element Software ◽  
Interface Coupling ◽  
Solid Interface ◽  
Calculation Results

In the study of bridge pier’s dynamic characteristics, the modal analysis is the foundation of other dynamic analysis and is of great significance for studying other dynamic performance. Based on the dynamic theory of fluid-solid interface coupling, a 3D water-structure coupling finite element modal is established and computed by ANSYS. To verify the validity of the calculation results, the results of finite element software is compared with the analytical solutions in reference books. The analysis indicated that the results of finite element software are reasonable when the radius of bridge pier is five times the radius of water body. The ratio of water depth and the bridge pier’s height has a great influence on the change scale of bridge pier’s frequency. With the increase of bridge pier’s height-diameter ratio, the first three order natural vibration frequency is reduced.

Structural Dynamic Analysis and Optimization of High-Speed Precision Machining Center Column

2013 ◽  
Vol 655-657 ◽  
pp. 48-51
Author(s):  
Fu Qiang Wang ◽  
Zhi Yuan Rui ◽  
Dong Ping Zhao ◽  
Chun Li Lei
Keyword(s):  
Dynamic Analysis ◽  
High Speed ◽  
Dynamic Performance ◽  
Optimization Theory ◽  
Structure Optimization ◽  
Precision Machining ◽  
Variation Analysis ◽  
Optimization Scheme ◽  
Structural Dynamic ◽  
Machining Center

The theory of structural dynamic analysis is put forward firstly. Then the dynamic performance of HMC80 high-speed precision machining center column is analyzed by means of finite element method. The dynamic performance of the column is analyzed using structural dynamic optimization theory and variation analysis with the thickness of wall plate and the inner rib plates as the parameters thirdly. Based on the analysis results, the structure optimization scheme of the column is obtained. The structure optimization scheme is analyzed and the analysis results show that the dynamic performance of the column optimization scheme is improved obviously.

Loading Tests Research on Mianyang Anchang River Landscape Footbridge

2013 ◽  
Vol 361-363 ◽  
pp. 1210-1216
Author(s):  
Meng Yan ◽  
Nan Wu
Keyword(s):  
Prestressed Concrete ◽  
Dynamic Performance ◽  
Test Methods ◽  
Loading Test ◽  
Static Test ◽  
Symmetric Structure ◽  
The Future ◽  
Loading Tests ◽  
Prestressed Concrete Bridge ◽  
Dynamic Performance Analysis

Crossing Anchang River in Mianyang City，Anchang Landscape Footbridge connects Yuyingba and Baisheng Plaza. It bears large amount of pedestrian loads. The approximately anti-symmetric structure of this prestressed concrete bridge is girder-arch combined with unique and elegant appearance. However, without much design and construction reference, loading test is necessary for this footbridge to ensure its security in the future. Tanks are adopted in static test as the equivalent pedestrian loads to imitate the actual working conditions of the bridge and to assess its working capacity and construction quality, providing basis for the completion and the design exploration. Test methods and analysis results of this footbridge can be used as reference in loading test and dynamic performance analysis of similar bridges in the future.

Optimized Simulation Method and Experimental Verification on Dynamic Analysis of a Light Truck Frame

2009 ◽  
Author(s):  
Feng Gao ◽  
Yonghua Xiong ◽  
Lei Tian ◽  
Farong Du ◽  
Guoyan Xu
Keyword(s):  
Geometric Model ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Element Model ◽  
Simulation Method ◽  
Frame Structure ◽  
Light Truck ◽  
Combined Simulation ◽  
Set Up ◽  
Beam Frame

The three-dimensional geometric model of the fringe-beam frame had been built based on the frame structure of a light truck. In order to optimize the frame structure, the finite element model of the frame and the suspension system were set up. Considering the influence of suspension on frame dynamic performance, the modal properties of the frame model was analyzed in the commercial analysis program ANSYS, using two different methods. Based on the experiments, it was verified that combining MPC184 elements and spring elements Combin14 is a better way to simulate suspension compared to using spring finite elements only. Furthermore, the combined simulation results coincide with experimental modal analysis results, which were conducted thereafter. Subsequently, the frame stress-strain distribution rules and dynamics response were calculated under the random road spectrum excitation, and the frame dynamic parameters were obtained. This study provides some theoretical bases for frame structure improvement, and proposes an optimum method to simulate suspension. The results have direct significance in ensuring the stability, comfort and reliability of a light truck frame.

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