Three-Dimensional Nonlinear Finite Element Analysis on the Concrete Face Cock-Fill Dam of TianChi Upper Reservoir

2013 ◽  
Vol 838-841 ◽  
pp. 1763-1767
Author(s):  
Shuang Mei Chang ◽  
Wen She He ◽  
Yu Qiang Cheng ◽  
Su Min Zhao
Keyword(s):  
Finite Element ◽  
Water Pressure ◽  
Three Dimensional ◽  
Elastic Model ◽  
Finite Element Software ◽  
Dimensional Finite Element ◽  
Stress And Deformation ◽  
Three Dimensional Finite Element ◽  
Nonlinear Elastic ◽  
Concrete Face

Taking the concrete face cock-fill dam upper reservoir of Tianchi as an example, the stress and deformation characteristics of concrete face rock-fill dam are studied in-depth in this paper. The article builds a fine three-dimensional finite element model of Tianchi upper reservoir by a nonlinear elastic model of the finite element software ADINA. The stress and deformation of the two conditions under completion and storage for the dam are calculated ,which will be analyzed to obtain stress - strain distribution of the dam in two conditions, comparing dam stress and deformation before and after impoundment to get impact of the water pressure on the dam stress and deformation: comparing after impoundment and completion , the dam water level displacement of upstream side from role of horizontal water pressure will increase , the dam upstream offsets to downstream , but the offset is little ; Due to dam is affected by vertical hydrostatic pressure and uplift pressure after impoundment , the dam settlement is slightly less than the completion in storage. KEY WORDS: Tianchi upper reservoir, The concrete face cock-fill dam, Three-dimensional finite element, Nonlinear elastic model, Analysis of stress and deformation

scholarly journals Analysis of Stress Deformation Characteristics of Composite Geomembrane Rock-Fill Dam with Core Wall

2013 ◽  
Vol 470 ◽  
pp. 962-965
Author(s):  
Dong Yan Ding ◽  
Jian Min Ren
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Elastic Model ◽  
Deformation Characteristics ◽  
Distribution Rule ◽  
Dimensional Finite Element ◽  
Stress And Deformation ◽  
Three Dimensional Finite Element ◽  
Nonlinear Elastic

The Chengzigou hydropower station of composite geomembrane rockfill dam as an example of the dam body and the composite geotechnical membrane stress and deformation characteristics are used nonlinear elastic model - Duncan EB model establish three-dimensional finite element model of rockfill,by using the large finite element softwareFLAC3D,whice provided geogrid element to simulate lexible geomembrane shear interaction with soil.The stress and deformation of the dam and the composite geomembrane is calculated under two conditionscompletion period and impoundment period.And analyze the change of the stress and strain distribution rule,whice will provide the basis for the design of the geomembrane.

Finite Element Analysis of the Effect of Surface Hardening Depth in Port Crane Wheel

2011 ◽  
Vol 291-294 ◽  
pp. 3282-3286 ◽  
Author(s):  
Jiang Wei Wu ◽  
Peng Wang
Keyword(s):  
Finite Element ◽  
Surface Hardening ◽  
Three Dimensional ◽  
Element Model ◽  
Contact Stresses ◽  
Numerical Results ◽  
Element Analysis ◽  
Finite Element Software ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

In port crane industry, the surface hardening technique is widely used in order to improve the strength of wheel. But the hardening depth is chosen only by according to the experience, and the effect of different hardened depths is not studied theoretically. In this paper, the contact stresses in wheel with different hardening depth have been analyzed by applying three-dimensional finite element model. Based on this model, the ANSYS10.0 finite element software is used. The elastic wheel is used to verify the numerical results with the Hertz’s theory. Three different hardening depths, namely 10mm, 25mm and whole hardened wheel, under three different vertical loads were applied. The effect of hardening depth of a surface hardened wheel is discussed by comparing the contact stresses and contact areas from the numerical results.

Three Dimensional Finite Element Analysis of Reinforced Concrete Rectangular-Sectioned Aqueduct

2013 ◽  
Vol 644 ◽  
pp. 358-361
Author(s):  
Dong Yu Ji
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Element Analysis ◽  
Finite Element Software ◽  
Operating Process ◽  
Element Simulation ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper adopts general finite element software to carry out three-dimensional finite element simulation analysis for Huizeli reinforced concrete rectangular-sectioned aqueduct. Considering four combination cases in aqueduct’s construction and operating process, researching variation laws of the aqueduct’s stress and displacement. Analysis results show that design scheme of Huizeli reinforced concrete rectangular-sectioned aqueduct is reasonable, it can meet design requirements. Analysis results provide some theory references for design of reinforced concrete rectangular-sectioned aqueduct.

Three-Dimensional Seismic Analysis on Reactor Structure

2010 ◽  
Author(s):  
Naibin Jiang ◽  
Feng-gang Zang ◽  
Li-min Zhang ◽  
Chuan-yong Zhang
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Seismic Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Earthquake Excitation ◽  
Finite Element Software ◽  
Reactor Structure ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

The seismic analysis on reactor structure was performed with a new generation of finite element software. The amount of freedom degree of the model was more than twenty millions. The typical responses to operational basis earthquake excitation were given. They are larger than those with two-dimensional simplified finite element method, and the reasons of this phenomenon were analyzed. The feasibility of seismic analysis on large-scale three-dimensional finite element model under existing hardware condition was demonstrated, so some technological reserves for dynamic analysis on complicated equipments or systems in nuclear engineering are provided.

Force Analysis of Reinforced Concrete U-Shaped Beam-Supported Aqueduct

2013 ◽  
Vol 394 ◽  
pp. 381-384
Author(s):  
Ke Ding Liu
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Shaped Beam ◽  
Finite Element Software ◽  
Element Simulation ◽  
Dimensional Finite Element ◽  
Design Requirements ◽  
Three Dimensional Finite Element

This paper adopts general finite element software to carry out three-dimensional finite element simulation analysis for Sunjiagou reinforced concrete U-shaped beam-supported aqueduct. Considering five combination cases in aqueducts construction and operational process, researching variation laws of the aqueducts stress and displacement. Analysis results show that design scheme of Sunjiagou reinforced concrete U-shaped beam-supported aqueduct is reasonable, it can meet design requirements. Analysis results provide some theory references for design of reinforced concrete U-shaped beam-supported aqueduct.

Mechanical Performance Analysis of Petroleum Derrick Substructure

2011 ◽  
Vol 105-107 ◽  
pp. 2121-2124
Author(s):  
Jun Feng Pei ◽  
Sheng Ying Deng ◽  
Guang Min Chen ◽  
Jian Zhang
Keyword(s):  
Finite Element ◽  
Mechanical Performance ◽  
Three Dimensional ◽  
Element Model ◽  
Structural Testing ◽  
Static Properties ◽  
Finite Element Software ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Project Structure

In recent years, the self-elevating derrick substructure which with the characteristics of easy to install、remove and transfer are gradually replacing layer box, box block substructure, etc. The three-dimensional finite element model of the MXD-701 jack-up derrick and substructure, which is used to analyze static properties of the petroleum substructure under the six different working loads are built by the ANSYS finite element software. Meanwhile, the wireless structural testing system（STS-WiFi）is testing at the MXD-701 petroleum substructure. Then comparing of the model results and testing results. Analysis results indicate that the stress of the substructure at the two beam table is greatest, the stress of the upper part of the guy column is much greater, and others are low, but in general, the overall substructure can fit the requirements of the strength and intensity. The compared results can accurately reflect the project structure of the stress and strain. Then, we can get the capacity of the substructure in order to provide evidence to the security situation of the substructure. It will have great significance to enrich and develop the mast base design and safety assessment theory.

Improved mould design in metal injection moulding by combination of numerical simulations and experiments

2002 ◽  
Vol 216 (12) ◽  
pp. 1533-1547 ◽  
Author(s):  
J-C Gelin ◽  
T Barriere ◽  
B Liu
Keyword(s):  
Finite Element ◽  
Injection Moulding ◽  
Three Dimensional ◽  
Optimal Choice ◽  
Finite Element Software ◽  
Metal Injection Moulding ◽  
Dimensional Finite Element ◽  
Mould Design ◽  
Metallic Parts ◽  
Three Dimensional Finite Element

Metal injection moulding combines thermoplastic injection moulding and powder metallurgy technologies to produce small and intricate metallic parts in a near net shape. The injection stage is of primary importance and the injection moulding of a metallic powder and plastic binder permits the desired shape to be obtained. A procedure is proposed for mould cavity design and optimal choice of injection parameters. This procedure is based on both numerical simulation by the finite element method and experiments allowing a primer choice and an update of injection moulding parameters. The powder segregation phenomena have been also investigated by experiments, moulding and simulation and an approach based on a biphasic flow approach has been proposed that permits powder segregation to occur during injection. Based on that approach, a three-dimensional finite element software has been developed and used for simulation. Experiments and numerical investigations on powder segregation have been carried out and results are presented that are in good agreement with experiments.

The Comparison of the Criteria for Ratcheting in ASME VIII-2 and Methods Given by C-TDF

2020 ◽  
Author(s):  
Liping Wan ◽  
Wangping Dong
Keyword(s):  
Finite Element ◽  
Plastic Strain ◽  
Engineering Design ◽  
3D Structure ◽  
Three Dimensional ◽  
Element Analysis ◽  
Finite Element Software ◽  
Elastic Core ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Abstract Ratcheting assessment by elastic-plastic stress analysis is presented in ASME VIII-2, paragraph 5.5.7. There are three criteria. The first one is strict in engineering design. It’s hard for most of structures to satisfy it. If the plastic strain in the structure is zero, it means that the material is not fully utilized and maybe the structure is unreasonable. Therefore, the second and third criteria are used much more. The first one and the third one can be observed directly and judged accurately by the finite element analysis results. The second one demands an elastic core in the primary-load-bearing boundary. It could be easily observed when the structure is axisymmetric, but hard to judge in the 3D structure. Okamoto in Committee on Three Dimensional Finite Element Stress Evaluation (C-TDF) has studied two thermal stress ratchet criteria: evaluating variations in the plastic strain increments and evaluating variations in the elastic core region, which can accurately assess ratcheting. Recent years, based on the criteria above, more researches have been performed by engineers not only from C-TDF but from all over the world. In this work, several two-dimensional structures and three-dimensional structures under particular load and displacement boundaries are performed by using finite element software ANSYS, aiming to compare the similarities and differences between the criteria in ASME VIII-2, 5.5.7.2 and those given by C-TDF. The assessment of these structures presented in this work will help engineers understand the realization of the criteria and methods in engineering design, especially how to utilize the results from ANSYS.

The Research on the Influence of the Forms of Foundation on the Behavior of Adjacent Excavation Based on Building Materials

2013 ◽  
Vol 788 ◽  
pp. 606-610
Author(s):  
Qing Xiang Ji ◽  
Xin Sheng Ge
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Building Materials ◽  
Three Dimensional ◽  
Element Model ◽  
Deep Excavation ◽  
Foundation Pit ◽  
Finite Element Software ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Foundation pit excavation could be affected to some extent by surrounding different kinds of building materials, building structure, foundation form and load distribution, especially in intensive buildings. In this paper, based on the large-scale finite element software ANSYS, a three-dimensional finite element model is established to analyze the consequences of these complex and uncertain factors faced with by deep excavation projects and the conclusions of the excavation affected by different foundations form of adjacent buildings are arrived at.

Analysis of Stress Response for the Super High Rise Double-Tower Connected Structure with the Trusses of Changing Rigidity

2011 ◽  
Vol 291-294 ◽  
pp. 1559-1563 ◽  
Author(s):  
Zai Gen Mu ◽  
Li Wang ◽  
Zhong Fan
Keyword(s):  
Mechanical Property ◽  
Finite Element ◽  
Stress Response ◽  
Three Dimensional ◽  
High Rise ◽  
Finite Element Software ◽  
Connected Structure ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

According to the current “Construction structure load standard”, in this paper, on the base of building a FEM of super high rise DTCS that with connected trusses and a single tower without connected trusses, the mechanical property of each was analyzed by using ETABS, a three- dimensional finite element software. The contrasted result indicates that with connected trusses the double-tower connected structures have better performance and higher structural effectiveness. This feature is more clearly seen with the increases of the truss’ rigidity. The stress of the truss shows certain regularity with the alteration of the truss’ stiffness and location.

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