Temperature Field Due to a Moving Heat Source: A Moving Mesh Finite Element Analysis

1985 ◽  
Vol 52 (2) ◽  
pp. 274-280 ◽  
Author(s):  
Z.-B. Kuang ◽  
S. N. Atluri
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Heat Source ◽  
Process Zone ◽  
Surrounding Medium ◽  
Moving Mesh ◽  
Transient Temperature ◽  
Moving Heat Source ◽  
Element Analysis ◽  
External Agent

The transient temperature field (as seen by a moving observer) due to a moving heat source, such as the process zone near a dynamically propagating crack tip or an external agent as in the case of welding, is analyzed by a moving-mesh finite element procedure. The effects of the temperature-dependent material properties, and of the loss of heat to the surrounding medium through convection and radiation, are studied. Situations under which conditions in the process zone may be labeled as “isothermal” or “adiabatic” are explored. Estimates of temperature rise near the tip of a crack propagating at realistic speeds in structural steels are made.

A Study on the Grinding Temperature Field for Titanium Alloy

2007 ◽  
Vol 339 ◽  
pp. 45-49
Author(s):  
W. Li ◽  
Tong Xing ◽  
Bao Xiang Qiu ◽  
Gang Xiang Hu ◽  
Yang Fu Jin
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Heat Source ◽  
Simulation Software ◽  
Transient Temperature ◽  
Fe Model ◽  
Grinding Temperature ◽  
Wet Grinding ◽  
Dry Grinding ◽  
Grinding Temperature Field

A reasonable finite element (FE) model of grinding temperature field has been developed on the basis of analysis of the transient temperature field， and three kinds of boundary conditions are loaded on the element of a moving heat source. The study, which is based on the finite element principle, has been carried out using the numerical simulation software ANSYS. Many results have been obtained including three dimensional temperature distribution map. The simulated results under different conditions show good agreement with the experimental results. With the comparison of the dry-grinding and wet-grinding, the result shows that the wet-grinding temperature with a proper grinding fluid is rather lower than the dry-grinding temperature. Finally, the variable coefficient of convective heat transfer and the different form heat source have been discussed in detail.

Finite Element Analysis of Temperature Field of Traction Motor

2012 ◽  
Vol 189 ◽  
pp. 461-464
Author(s):  
An Xing Zhu ◽  
Zhi Xiong Yang ◽  
Yi Cui
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Temperature Field ◽  
Convective Heat Transfer Coefficient ◽  
Transient Temperature ◽  
Iron Core ◽  
Field Calculation ◽  
Three Dimension ◽  
Element Analysis ◽  
Traction Motor

Due to the fact of immeasurable inner temperature of inverter-fed traction motor, three-dimension finite element model of part of rotor iron core and half a rotor bearing were established. The convective heat transfer coefficient between the air gap of motor and rotor surface were calculated by the heat transfer and fluid mechanics theory. The influence of temperature rise on the stator and rotor resistance was considered for thermal loss calculation. The influence of the end of stator and rotor on axial temperature distribution was also taken into account. Then three-dimensional transient temperature field of the motor was simulated at the rated load. Temperature field with different loads was also computed. The aim has been to optimize the design with respect to the transient stresses. According to contrastive analysis compared with other method, it demonstrated the accuracy of simulation model and thermal field calculation results.

Thermal Characteristic Analyses of NC Machine Spindle System

2012 ◽  
Vol 479-481 ◽  
pp. 2481-2484 ◽  
Author(s):  
Zhong Qi Sheng ◽  
Xiang Dong Shi ◽  
Sheng Li Dai ◽  
Yan Jin
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Deformation ◽  
Thermal Characteristic ◽  
Numerical Control ◽  
Transient Temperature ◽  
Element Analysis ◽  
Spindle System ◽  
Nc Machine ◽  
Machine Spindle

This paper used finite element method to analyze thermal characteristics of numerical control (NC) machine spindle system, and studied the steady temperature field and the transient temperature field of the machine tool and the thermal deformation of the spindle at 3000 rpm. General finite element analysis software ANSYS is used for analysis. Through the analysis of the temperature field and thermal deformation of the spindle system, this paper finally obtained the deformation situation of the spindle system in thermal load. By changing the boundary conditions of the spindle system to analyze the heat distortion of the spindle system and the results showed that assembling a cooling jacket in front of the spindle box can signally reduce the thermal error of the spindle system.

scholarly journals Finite Element Simulation Research on Medium Plate Multi-Pass Welding Temperature Field

2015 ◽  
Vol 9 (1) ◽  
pp. 786-790
Author(s):  
Huawei Liu ◽  
Linxin Niu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Heat Source ◽  
Steel Plate ◽  
Three Dimensional ◽  
Steel Plates ◽  
Element Analysis ◽  
Welding Temperature ◽  
Welding Arc ◽  
Input Position

V-grooved steel plate 30mm in thickness has been taken into consideration to research on the distribution of temperature field for the multi-pass welding of steel plate with intermediate thickness in the whole process of welding and cooling. With the establishment of a reasonable three-dimensional solid model, the utility of ANSYS software for finite element analysis, the usage of birth-death elements and the setting of normal Gauss heat source, steps have been undertaken to achieve the goal that the process of multi-pass welding about steel plate in intermediate thickness is simulated and the law of distribution about welding temperature field is obtained. The research results indicate the following: the temperature in every point of base metal changes constantly when the steel plate 30mm in thickness is being welded, the heat input position and position behind heat source are the integral parts which have the highest temperature during the process that welded joints are welded, the temperature gradient in front of welding arc is pretty large as well as that behind welding arc is relatively small. The calculation results are consistent with actual observations providing exactly reliable references for stress field of the welding on steel plates.

scholarly journals Development of Finite Element Solver for Welding Analysis

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Abid Ali Khan ◽  
Farzeen Shahid ◽  
Ihtzaz Qamar
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Heat Conduction ◽  
Heat Source ◽  
Welding Process ◽  
Transient Heat Conduction ◽  
Moving Heat Source ◽  
Structural Members ◽  
Final Solution ◽  
Governing Equations

Welding is a process of joining the similar or different metals. Improper welding process leads to inaccuracies and misalignments of structural members, causing high cost and delays in work. Therefore, it is essential to predict the temperature field during welding process. Different techniques can be used to predict the temperature field, which may lead to structure distortion. The present study aims to develop a finite element solver for transient heat conduction analysis. The final solution is calculated from the assumed solution and compared with the numerical computations. The solver is then modified for use of moving heat source. The modification comprise, change in governing equations with the inclusion of phase change. The moving heat source continuously increases the temperature during motion. When the heat source completes a pass, model is allowed to cool down in order to study the temperature distribution during cooling.

Research on Temperature Field of Variable Frequency Motor

2013 ◽  
Vol 273 ◽  
pp. 355-359
Author(s):  
Yao Hui Wu ◽  
Xiao Mei Liu ◽  
Xiu Feng Meng ◽  
Hong Tu Zhao
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Induction Motor ◽  
Temperature Rise ◽  
Experimental Tests ◽  
Transient Temperature ◽  
Variable Frequency ◽  
Element Analysis ◽  
Finite Element Software ◽  
Frequency Power

To the problem of small induction motor that supplied by Variable frequency power temperature rise, according to the basic theory of heat transfer and using finite element analysis software, in the paper, it established a motor of two-dimensional transient temperature field model ,though the equivalent simplify of the structure and thermal conductivity, and the compare between the simulation of finite element software studies and the temperature experimental tests , It confirms the affect that variable frequency power on the motor temperature rise, and finds a simplified simulation of motor temperature field and parameters equivalent approach which do provide effective help to the design and use of the induction motor.

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