The Application of Polyurethane Material Structure in the Greenhouse

2014 ◽  
Vol 1033-1034 ◽  
pp. 970-977
Author(s):  
Xiao Feng Yang ◽  
Hua Yang Liang ◽  
Okumura Ummin ◽  
Mu Yang
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Normal Load ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Frame Structure ◽  
Material Structure ◽  
Element Analysis ◽  
Modern Agriculture ◽  
Finite Element Software

The application of new polymer materials in modern agriculture is considered and discussed in a completely new view in this paper. Combined with modern agricultural characteristics: out of season and large-scale planting, the excellent characteristics of modern polymeric materials are skillfully applied to modern agriculture greenhouse rack, which solves many defects of the traditional greenhouse frame structure material. This paper takes Hainan Province as the area of greenhouse structure research and analyze the shed load in the view of structural analysis, based on which the finite element software ABAQUS for the greenhouse framework structure are analyzed by finite element analysis. The results show that the stress and deformation results can satisfy the requirements of structural strength in the normal load conditions.

The Finite Element Analysis and Comparison of Wind Turbine Tower under Static Wind Load and Fluctuating Wind Load

2013 ◽  
Vol 446-447 ◽  
pp. 733-737
Author(s):  
Chi Chen ◽  
Hao Yuan Chen ◽  
Tian Lu
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Wind Turbine ◽  
Modal Analysis ◽  
Large Scale ◽  
Wind Load ◽  
Element Analysis ◽  
Finite Element Software ◽  
Wind Turbine Tower ◽  
Fluctuating Wind

In this paper, a 1.5 MW wind turbine tower in Dali, Yunnan Province is used as the research object, using large-scale finite element software Ansys to carry on the dynamic analysis. These natural frequencies and natural vibration type of the first five of tower are obtained by modal analysis and are compared with natural frequency to determine whether the resonance occurs. Based on the modal analysis, the results of the transient dynamic analysis are obtained from the tower, which is loaded by the static wind load and fluctuating wind load in two different forms. By comparing the different results, it provides the basis for the dynamic design of wind turbine tower.

The Finite Element Analysis on Axial Tensile Bearing Capacity of Round Steel-Tubes Reinforced with CFRP Sheets

2011 ◽  
Vol 368-373 ◽  
pp. 1595-1599
Author(s):  
Xiu Li Wang ◽  
Jun Jie Li
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Large Scale ◽  
Steel Tubes ◽  
Element Analysis ◽  
Cfrp Sheets ◽  
Finite Element Software ◽  
Axial Tensile ◽  
The Finite Element Analysis ◽  
Circumferential Reinforcement

The numerical simulation calculation on round steel-tubes reinforced with CFRP sheets was done through the large-scale finite element software ANSYS. In this research, four factors were comparatively analyzed so as to obtain the influence of them on ultimate axial tensile bearing capacity of steel-tubes. These four factors are longitudinal reinforcement length rate , thickness , elastic modulus and circumferential reinforcement ways of CFRP sheets. The results show that the ultimate axial tensile bearing capacity of steel-tubes strengthened with CFRP sheets is enhanced significantly and the reinforcement effect is very good.

The Chemo-Electro-Mechanical Behavior of the pH Sensitive Hydrogels in Transient Condition

2010 ◽  
Author(s):  
Kamlesh J. Suthar ◽  
Muralidhar K. Ghantasala ◽  
Derrick C. Mancini
Keyword(s):  
Finite Element ◽  
Research Effort ◽  
Polymeric Materials ◽  
Drug Uptake ◽  
Nonlinear Material ◽  
Transient Condition ◽  
Element Analysis ◽  
Finite Element Software ◽  
Hydrogel Swelling ◽  
Response To Change

Hydrogels are 3-D network polymeric materials that exhibit a phase-transition due to a change in their environment so that the response causes the hydrogel to swell or shrink. The changes in the solvent pH cause the hydrogel to swell or shrink, which is exploited for designing a drug delivery system. The time taken for drug uptake or delivery is an important aspect in these applications. The development of such systems require thorough understanding of the kinetic behavior of hydrogel swelling. We report the results of our research effort to model the time-dependent behavior using the finite element analysis. The hydrogel response is modeled using three partial differential equations in which two are nonlinear and third equation uses nonlinear material constants. Solving all three nonlinear equations using the finite element method for transient condition is a significant challenge. Our model is implemented using the generic finite element software COMSOL and the method can be used with any software having similar capabilities. We discuss the simulation of phase-transitions in transient conditions emphasizing the response to change in the solvent pH. The simulation was carried out on hydrogels with diameters from 200 μm to 500 μm while varying the solvent pH from 3 to 6. The results are compared with the published experimental data. A major achievement of this work is that the transient analysis is carried out in 2D, while the most reported literature are confined to one-dimensional analysis.

Reinforced Concrete Frame - Shear Wall Structure, Floor Open Hole Static Finite Element Analysis

2013 ◽  
Vol 788 ◽  
pp. 521-524 ◽  
Author(s):  
Kai Qin ◽  
Fu Ma
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Center Of Mass ◽  
Wall Structure ◽  
Reinforced Concrete Frame ◽  
Element Analysis ◽  
Weak Layer ◽  
Finite Element Software ◽  
Open Hole ◽  
Irregular Buildings

along with the diversification of architectural image and the construction of complicated functions, there are more and more irregular buildings. Floor open hole especially floor open hole is the typical representative of irregular buildings. Floor open hole lead to floor in-plane rigidity weakening that open hole level stiffness drop form weak layer, the structure of the center of mass and centroid offset weak layer is larger, so in the earthquake under the action of stress is more complicated. Large-scale finite element software ANSYS is applied in this article simplified single documents across the floor in the middle of the hole structure is simulated and analyzed under the static load of open hole plate, beam and column structure deformation and stress distribution, and will not open holes in the floor and open hole in the floor slab under the action of horizontal static stress were analyzed.

The Optimum Design of Large-Scale Inner-Tower Truss-Supporting Structure Based on Finite Element Analysis

2011 ◽  
Vol 201-203 ◽  
pp. 2645-2648
Author(s):  
Xiao Jing Wang ◽  
Dong Hui Li ◽  
Zhi Hu Gao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimum Design ◽  
Optimization Design ◽  
Large Scale ◽  
Element Analysis ◽  
Supporting Structure ◽  
Finite Element Software

A kind of truss-work used in large-scale tower is introduced in this paper. According to this example, a method of optimization design using the optimum function of ANSYS, which is one of the finite element software, is searched and discussed.

Comparison of Stiffness Degradation of Special-Shaped Column and Rectangular Column Structure in Earthquake

2013 ◽  
Vol 838-841 ◽  
pp. 1492-1496
Author(s):  
Yi Ying Li ◽  
Wen Pan ◽  
Xiao Feng Zou
Keyword(s):  
Finite Element ◽  
Energy Dissipation ◽  
Base Isolation ◽  
Time History ◽  
Frame Structure ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Software ◽  
Column Structure ◽  
Rare Earthquake

In this paper, using the finite element software PERFORM3D to establish the finite element analysis model for isolation and seismic frame structure with special-shaped column and rectangular column frame structure, and the overall structure of the moderate and strong elastic and nonlinear earthquake time-history analysis to get the dynamic characteristics, from two aspects of the damping coefficient in horizontal direction and the energy dissipation, investigation structure in earthquake and rare earthquake of superstructure stiffness attenuation. It can be drawn only seismic resistance measures are taken, the special-shaped column structure under rare earthquake stiffness attenuation speed is greater than the rectangular column, if after using base isolation technology, although the special-shaped column stiffness attenuation rate is still greater than the rectangular column, but the two energy dissipation ability.

Design and Analysis of the Dismountable Frame Structure for Vacuum Container

2012 ◽  
Vol 200 ◽  
pp. 27-31
Author(s):  
Yun Xiang Huang ◽  
Ke Tian Li ◽  
Zhe Hao Tan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Physical Model ◽  
Thin Plate ◽  
Optimization Design ◽  
Frame Structure ◽  
Element Analysis ◽  
Finite Element Software ◽  
Classic Theory ◽  
Elastic Thin Plate

Painting is one of the most important processes in decorating industrial product. But the vacuum container is the key of vacuum painting equipment. This paper analyzes the principle of dismountable vacuum container’s structure and establishes its basic physical model and simulates its environment load by the finite element software, then analyzes the important component and obtains the index of reliability and safety of dismountable vacuum container. According to the classic theory of elastic thin plate, the accuracy of the results of finite element analysis is proved. Then the further optimization design and the further finite element analysis are utilized to optimize the important component of vacuum container, finally the results meet the requirements.

Contact Stress Analysis of Hard Coating Rolling Bearing

2014 ◽  
Vol 644-650 ◽  
pp. 90-94
Author(s):  
Yong Guo
Keyword(s):  
Finite Element ◽  
Contact Stress ◽  
Large Scale ◽  
Roller Bearing ◽  
Analysis Tool ◽  
Element Analysis ◽  
Finite Element Software ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller ◽  
The Ideal

Take large-scale general finite element software ANSYS as the analysis tool and the cylindrical roller bearing as the research object, we establish the ideal contact numerical model of roller and analyze the Hertz contact stress. That calculation results of the ideal model are correspond to that of the finite element verifies the correctness of the finite element analysis method. In this paper, we establish the model of cylindrical roller bearing with coating, studying the distribution of contact stress in coatings with different thickness and analyzing the effect of coatings.

Excavation and Support of Deep Foundation Pit Finite Element Analysis

2012 ◽  
Vol 532-533 ◽  
pp. 450-454
Author(s):  
Xiao Lin Dong ◽  
Dong Nan Han
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Earth Pressure ◽  
Internal Force ◽  
Structural Deformation ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Element Analysis ◽  
Finite Element Software ◽  
Excavation Process

In this paper, sun deep foundation works as background for the pit excavation process are charged to protect the structural deformation and earth pressure traits were studied, and the use of the GTS large-scale finite element software, the actual works in the excavation process in a step-by-stepthe displacement field, the internal force distribution of the analysis, management is deep foundation software and GTS software to calculate the results were compared, focusing on the supporting structure of the deformation and its influencing factors, and come to some meaningful patternsprovide a meaningful reference for similar projects.

scholarly journals Stator Non-Uniform Radial Ventilation Design Methodology for a 15 MW Turbo-Synchronous Generator Based on Single Ventilation Duct Subsystem

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2760
Author(s):  
Ruiye Li ◽  
Peng Cheng ◽  
Hai Lan ◽  
Weili Li ◽  
David Gerada ◽  
...  
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Design Methodology ◽  
Large Scale ◽  
Synchronous Generator ◽  
Axial Direction ◽  
Scale Model ◽  
Element Analysis ◽  
Axial Temperature ◽  
Ventilation Duct

Within large turboalternators, the excessive local temperatures and spatially distributed temperature differences can accelerate the deterioration of electrical insulation as well as lead to deformation of components, which may cause major machine malfunctions. In order to homogenise the stator axial temperature distribution whilst reducing the maximum stator temperature, this paper presents a novel non-uniform radial ventilation ducts design methodology. To reduce the huge computational costs resulting from the large-scale model, the stator is decomposed into several single ventilation duct subsystems (SVDSs) along the axial direction, with each SVDS connected in series with the medium of the air gap flow rate. The calculation of electromagnetic and thermal performances within SVDS are completed by finite element method (FEM) and computational fluid dynamics (CFD), respectively. To improve the optimization efficiency, the radial basis function neural network (RBFNN) model is employed to approximate the finite element analysis, while the novel isometric sampling method (ISM) is designed to trade off the cost and accuracy of the process. It is found that the proposed methodology can provide optimal design schemes of SVDS with uniform axial temperature distribution, and the needed computation cost is markedly reduced. Finally, results based on a 15 MW turboalternator show that the peak temperature can be reduced by 7.3 ∘C (6.4%). The proposed methodology can be applied for the design and optimisation of electromagnetic-thermal coupling of other electrical machines with long axial dimensions.

Sign in / Sign up

Export Citation Format

Share Document