Analysis of Temperature Field of Nuclear Canned Pump and Thermal Deformation Calculation of the Shielded Can

2012 ◽  
Vol 588-589 ◽  
pp. 1862-1865
Author(s):  
Yue Jun An ◽  
Chun Ye Guo ◽  
Guo Ming Liu ◽  
Li Ping Xue
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Temperature Distribution ◽  
Heat Source ◽  
Theoretical Basis ◽  
Thermal Deformation ◽  
Field Data ◽  
Axial Direction ◽  
Element Model ◽  
Canned Motor

In order to find out the reason for deformation,cracking and leakage of the shielded can of nuclear canned motor and put forward the solution,a finite element model of 2-pole and 8kW canned motor in temperature field was created. Assigned materials and boundary conditions to each component and calculated the temperature distribution of the canned motor by equivalent heat source load method and display the distribution visibly.By combining with the temperature field data,obtained the temperature characteristics of the shielded can and calculated the thermal deformation based on the maximum temperature.The result of analysis show that the temperatures of each component are different,shielded can’s temperature rise is not uniformly distributed along the circumferential direction and the degree of thermal deformation along axial direction is larger than that along radial direction.The conclusion of this paper is conducive to understand the temperature distribution in canned motor and characteristics of thermal deformation in shielded can clearly,and provides an important theoretical basis for the development of new shielded can structure.

Numerical Simulation Analysis on the Temperature Field in Indirect Selective Laser Sintering of 316L

2013 ◽  
Vol 711 ◽  
pp. 209-213 ◽  
Author(s):  
Nai Fei Ren ◽  
Lei Jia ◽  
Dian Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Temperature Field ◽  
Heat Source ◽  
Simulation Analysis ◽  
Selective Laser Sintering ◽  
Element Model ◽  
Cyclic Loads ◽  
Physical Experiments ◽  
Key Points

Using APDL programming language, an appropriate finite element model is created and the moving cyclic loads of Gauss heat source are realized. From the detailed qualitative analysis of the results, the variety laws of temperature field in indirect SLS are obtained. Plot results at different moments, temperature cyclic curves of key points and the curves of depth of fusion and width of fusion on the set paths, are of important guiding significance for subsequent physical experiments.

Numerical Modeling and Initial Fatigue Life Estimations of Welded Structural Components

2014 ◽  
Vol 1029 ◽  
pp. 124-129
Author(s):  
Ivana Vasovic ◽  
Marko Ristic ◽  
Slavica Ristic ◽  
Mirko Maksimovic ◽  
Dragi Stamenkovic
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Residual Stresses ◽  
Numerical Simulations ◽  
Axial Direction ◽  
Element Model ◽  
Mechanical Analysis ◽  
Welding Simulation ◽  
Critical Areas ◽  
Good Agreement

Numerical simulations are powerful tool for analyzing and research in domain of mechanical constructions. In welded joints is very important to determine residual stresses and temperature distribution in sample, apropos, element of construction. In some cases doing the experiment is not possible, so numerical simulations can give the required results and overview of stress state, residual stresses, critical areas, displacement, temperature distribution and other data is needed for analyzing and improvement of constructions or parts of constructions. This analysis includes finite element model for the thermal and mechanical welding simulation. Welding simulation was considered as a sequential coupled thermo-mechanical analysis. The residual stress distribution and magnitude in axial direction was obtained. The paper also shows the results obtained in a simultaneously test of a butt welded thin steel sheet specimen by conventional methods and thermography. Numerical methods are also used in order to predict the crack of specimen. The obtained results confirm that it is very useful to use thermography and Finite Element Method (FEM) for early diagnostics of the complex structures in the exploitation conditions. In this paper is obtained good agreement of results between experiment and Numerical simulations.

The Effects of the Cooling Gallery Position on the Piston Temperature Field and Thermal Stress

2010 ◽  
Vol 37-38 ◽  
pp. 1462-1465 ◽  
Author(s):  
Jin Xiang Liu ◽  
Yue Wang ◽  
Wei Zheng Zhang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Stress ◽  
Radial Direction ◽  
Axial Direction ◽  
Element Model ◽  
Finite Element Analyses ◽  
Ring Groove ◽  
Engine Piston ◽  
Thermal Stress Concentration

The effects of cooling gallery position on the piston temperature field and thermal stress are studied. A finite element model of 1015 engine piston is developed using Pro/E software and finite element analyses are achieved through ANSYS code. Numerical simulations are performed to find the temperature and thermal stress change rules with regard to the cooling gallery position. The results demonstrate that the axial direction position of cooling gallery has obvious effects on the piston temperature while the radial direction position of cooling gallery affects the piston thermal stress a lot. The highest position of cooling gallery should be as the same line as the top of the first ring groove. The distance between cooling gallery and piston radial edge should be more than a certain value to decrease the temperature gradient and thermal stress concentration.

Thermal Characteristics Analysis and Engineering Application of Machining Center Ram Based on ABAQUS

2013 ◽  
Vol 694-697 ◽  
pp. 762-766 ◽  
Author(s):  
Pan Luo ◽  
Zhong Ping Hua ◽  
Shui Sheng Chen ◽  
Chen Dai
Keyword(s):  
Temperature Field ◽  
Thermal Deformation ◽  
Engineering Application ◽  
Thermal Characteristics ◽  
Thermal Error ◽  
Axial Direction ◽  
Element Model ◽  
Machining Center ◽  
Characteristics Analysis ◽  
The Finite Element Model

This paper establishes the finite element model of XK2535 gantry machining center ram structure, and considers the influence of bearing to the slippery pillow in the axial direction to analyzes the rams temperature field and thermal deformation based on ABAQUS. Finally using SINUMERIK 840D is to compensating thermal error of the ram.

Temperature Distribution and Operating Efficiency in Rectangular Cold Crucible Directional Solidifying Ti46Al0.5W0.5Si Alloys

2011 ◽  
Vol 117-119 ◽  
pp. 335-338
Author(s):  
Jie Ren Yang ◽  
Rui Run Chen ◽  
Hong Sheng Ding ◽  
Jing Jie Guo ◽  
Yan Qing Su ◽  
...  
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Numerical Calculation ◽  
Temperature Distribution ◽  
Element Model ◽  
Operating Efficiency ◽  
Heating Process ◽  
Cold Crucible ◽  
Directionally Solidified ◽  
The Finite Element Model

This paper gives a detailed study of temperature distribution on Ti46Al0.5W0.5Si alloy directionally solidified by cold crucible. Based on experiment and numerical calculation, the heating process under different power was investigated, and the operating efficiency of cold crucible was roughly calculated. Further, the temperature field of Ti46Al0.5W0.5Si alloy under high power was numerically calculated, the finite element model predicted the temperature distribution at different moment. The results give a significance guide on cold crucible directional solidification.

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.

Analysis of Packer Rubber Mechanics Properties

2014 ◽  
Vol 971-973 ◽  
pp. 380-389
Author(s):  
Jian Ning Wang ◽  
Gang Wu ◽  
Wei Yi Xie ◽  
Xin De Han ◽  
Ming Chao Gang
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Constitutive Model ◽  
Contact Stress ◽  
Theoretical Basis ◽  
Element Model ◽  
Rubber Material ◽  
Bottom Hole ◽  
Sealing Performance ◽  
The Finite Element Model

Abstract: The packer rubber stress in the bottom hole is more complex. Based on constitutive model of the packer rubber material, this paper determines such parameters as model constants, Poisson's ratio of rubber materials and elastic modulus by using experimental method, to build up the finite element model of center tube-rubber cylinder-casing for the purpose of stress analysis. Finally, the distribution regularity of rubber cylinder-casing contact stress and packer setting travel distance with varying loads is concluded. The results can provide the theoretical basis for further analysis of packer rubber sealing performance.

Analytical Modeling of Temperature Distribution in Interposer-Based Microelectronic Systems

2013 ◽  
Author(s):  
Leila Choobineh ◽  
Dereje Agonafer ◽  
Ankur Jain
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Temperature Field ◽  
Temperature Distribution ◽  
Analytical Modeling ◽  
Three Dimensional ◽  
Heat Transfer Process ◽  
Thermal Design ◽  
Research Attention ◽  
On Chip

Heterogeneous integration in microelectronic systems using interposer technology has attracted significant research attention in the past few years. Interposer technology is based on stacking of several heterogeneous chips on a common carrier substrate, also referred to as the interposer. Compared to other technologies such as System-on-Chip (SoC) or System-in-Package (SiP), interposer-based integration offers several technological advantages. However, the thermal management of an interposer-based system is not well understood. The presence of multiple heat sources in various die and the interposer itself needs to be accounted for in any effective thermal model. While a finite-element based simulation may provide a reasonable temperature prediction tool, an analytical solution is highly desirable for understanding the fundamentals of the heat transfer process in interposers. In this paper, we describe our recent work on analytical modeling of heat transfer in interposer-based microelectronic systems. The basic governing energy conservation equations are solved to derive analytical expressions for the temperature distribution in an interposer-based microelectronic system. These solutions are combined with an iterative approach to provide the three-dimensional temperature field in an interposer. Results are in excellent agreement with finite-element solutions. The analytical model is utilized to study the effect of various parameters on the temperature field in an interposer system. Results from this work may be helpful in the thermal design of microelectronic systems containing interposers.

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