Numerical Simulation of Temperature Field of Gears in Quenching Process

2013 ◽  
Vol 457-458 ◽  
pp. 566-570
Author(s):  
Hai Long Zhu ◽  
Shi Yun Li ◽  
Chun Rong Wang
Keyword(s):  
Temperature Field ◽  
Theoretical Basis ◽  
Physical Parameters ◽  
Actual Process ◽  
Simulation Process ◽  
Quenching Process ◽  
Simulation Results ◽  
Quenching Time ◽  
The Relationship ◽  
Thermal Physical Parameters

Combining with change of the thermal physical parameters of materials, the temperature field of 45 steel gears in quenching processes has been numerically simulated using the thermal analysis module of ANSY Workbench software. The relationship between temperature of gears parts and quenching time has been achieved, the simulation results are consistent with actual process. The methods is superior to the traditional manual measuring and experience judgment way. The simulation process has provided the due theoretical basis for the calculation of parts thermal stress and residual stress in quenching process.

Numerical Simulation on Temperature Field in Laser Welding for Aluminum Alloy with Different Thickness

2008 ◽  
Vol 575-578 ◽  
pp. 774-779 ◽  
Author(s):  
Yu Shu Rong ◽  
Xiong Jin Hui ◽  
Fan Ding
Keyword(s):  
Aluminum Alloy ◽  
Temperature Field ◽  
Laser Welding ◽  
Heat Of Fusion ◽  
Physical Parameters ◽  
Gauss Function ◽  
Simulation Results ◽  
Solution Accuracy ◽  
Thermal Physical Parameters ◽  
Different Thickness

By using FEA software-ANSYS, distribution of 3D temperature field in laser welding for aluminum alloy with different thickness was simulated. In order to improve solution accuracy and efficiency, the transition mesh was used. In view of the characters of laser welding, a travel heat source combined with Gauss function was designed by analyzing both the temperature relativity of the thermal physical parameters of material latent heat of fusion and the effect of convection radiation and characteristics of different thickness on temperature field. By using high-temperature thermocouple, the temperature field was measured. It is shown that the simulation results are in accordance with the experimental results.

The Transient Temperature Field Simulation and Analysis of Machinery’s Components by ABAQUS

2014 ◽  
Vol 941-944 ◽  
pp. 2420-2424 ◽  
Author(s):  
Jian Xiang Sun ◽  
Wei Jiang Xu
Keyword(s):  
Temperature Field ◽  
Transient Temperature ◽  
Temperature Field Distribution ◽  
Field Simulation ◽  
Transient Temperature Field ◽  
Thermal Stress Field ◽  
Standard Component ◽  
Quenching Process ◽  
Quenching Time ◽  
Abaqus Software

By using the Abaqus software, FEM calculation of the quenching process of non-standard component which has complex contour has been operated, the temperature field distribution which accompanies the quenching time has been obtained. The simulation process’s precision and efficiency is excellent, this method is applicable to the quenching technics’s improvement, and can offer the calculation basis to the analysis of the thermal stress field and residual stress. It can also provide the improving scheme for the intensity design of the coal winning machinery.

Study on Design Method of the Microstructure for Layered and Ring-Shaped Acoustic Cloaking Based on Bimode Metamaterial

2014 ◽  
Vol 684 ◽  
pp. 219-227
Author(s):  
Qian Jin Xiao ◽  
Xiang Dong Zhang ◽  
Jia Chang Qian ◽  
Hong Chen
Keyword(s):  
Theoretical Basis ◽  
Design Method ◽  
Design Methods ◽  
Design Parameters ◽  
Physical Parameters ◽  
Theoretical Design ◽  
Microstructure Model ◽  
Analytic Expression ◽  
Layered Design ◽  
The Relationship

The paper proposes a design method for the layered and ring-shaped acoustic cloaking based on BM. According to the theory of PM cloaking, physical parameters of the ring-shaped acoustic cloaking are given by theoretical design. Further, based on the features of microstructure of BM, the relationship between the parameters of each layer of microstructure of BM and the analytic expression of the physical parameters of acoustic cloaking made of BM is determined, and the design methods for microstructure of layered and ring-shaped acoustic cloaking are discussed, namely, radial equidistant layered design and radial non-equidistant layered design (i.e. equal sectorial angle layered design). At last, according to the radial non-equidistant layered design parameters of the ring-shaped acoustic cloaking, the microstructure model of the layered and ring-shaped acoustic cloaking is designed. The results of the study can serve as theoretical basis for actual production and application of acoustic cloaking.

RESEARCH ON TEMPERATURE FIELD NUMERICAL SIMULATION AND EXPERIMENT IN LASER QUENCHING PROCESS

2011 ◽  
Vol 10 (01) ◽  
pp. 109-116
Author(s):  
YANTAO WANG ◽  
BIN ZHU
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Field Research ◽  
Laser Heat Treatment ◽  
Discrete Simulation ◽  
Laser Quenching ◽  
Simulation Process ◽  
Experiment Method ◽  
Quenching Process ◽  
Simulation And Experiment

The numerical simulation and experiment method for temperature field research in the laser quenching process is proposed. First, several assumptions of the laser quenching process are discussed for the research convenience. The simulation process is analyzed by the Laser Heat-Treatment-2 software, which is developed in FORTRAN. A discrete simulation process and results are given through the setting of different parameters in the laser quenching process. Finally, the experimental study is carried out to demonstrate the validity of the simulation results.

Physical Parameters Consistency Based 3D Temperature Field Reconstruction for Combustion Flame

2014 ◽  
Vol 986-987 ◽  
pp. 852-857 ◽  
Author(s):  
Xu Guang Wang ◽  
Hai Peng Zhang
Keyword(s):  
Temperature Field ◽  
Dynamic Range ◽  
Flame Temperature ◽  
High Dynamic Range ◽  
Refraction Index ◽  
Lookup Table ◽  
Physical Parameters ◽  
High Dynamic ◽  
The Relationship ◽  
Temperature Field Reconstruction

We present a novel solution to accurately recover 3D dynamic flame temperature field based on physical parameters consistency. First, a new optical model is proposed to establish the relationship between the flame radiation and the radiance field, this model fully considers refractive effect caused by refraction index changing; Second, high dynamic range (HDR) cameras are used to take flame images, a lookup table is employed calculate temperature from radiance; Third, an algorithm is put forward to reconstruct the flame temperature field. Experimental results on real flame accord with physical facts, which demonstrate that our solution is validate.

scholarly journals Optimization of Roller Velocity for Quenching Machine Based on Heat Transfer Mathematical Model

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Yunfeng He ◽  
Jingkui Zhang ◽  
Hua Dong ◽  
Yongqiang Mu
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Mathematical Model ◽  
Temperature Field ◽  
Steel Plate ◽  
Optimization Method ◽  
Control Parameters ◽  
Quenching Process ◽  
Quenching Time ◽  
Different Thickness

During quenching process of steel plate, control parameters are important to product quality. In this work, heat transfer mathematical model has been developed for roller-type quenching machine to predict the temperature field of plate at first, and then an optimization schedule considering quenching technology and equipment limitations is developed firstly based on the heat transfer mathematical model with considering the shortest quenching time. A numerical simulation is performed during optimization process to investigate the effects of roller velocity on the temperature of representative plate. Based on the optimization method, study is also performed for different thickness of plate to obtain the corresponding roller velocity. The results show that the optimized roller velocity can be achieved for the roller-type continuous quenching machine based on the heat transfer mathematical model. With the increasing of plate’s thickness, the optimized roller velocity decreases exponentially.

Severe Paradoxical Dysphonia in Two Young Women

1993 ◽  
Vol 2 (3) ◽  
pp. 52-55 ◽  
Author(s):  
Michael Collins ◽  
Robert McDonald ◽  
Robert Stanley ◽  
Timothy Donovan ◽  
C. Frank Bonebrake
Keyword(s):  
Young Women ◽  
Theoretical Basis ◽  
Therapeutic Regimen ◽  
Instrumental Data ◽  
Relationship Of ◽  
The Relationship

This report describes an unusual and persistent dysphonia in two young women who had taken a therapeutic regimen of isotretinoin for intractable acne. We report perceptual and instrumental data for their dysphonia, and pose a theoretical basis for the relationship of dysphonia to this drug. We also provide recommendations for reducing the risk of acquiring a dysphonia during the course of treatment with isotretinoin.

Consciousness as a personal new formation and the determinant of future teachers’ valuable orientations in artistic education

2018 ◽  
pp. 17-24
Author(s):  
V. Tusheva
Keyword(s):  
Theoretical Basis ◽  
Value Orientations ◽  
Future Teachers ◽  
The Relationship ◽  
Personal Formation ◽  
New Formation

The determinants of value orientations of a teacher of higher artistic education are identified, qualitative and instrumental properties of a teacher’s consciousness are determined, the relationship between value and sense-bearing processes at the level of cultural and personal senses and outlook priorities correlated with the main messages of postnonclassical science are revealed in the article on the bases of humanistic personally oriented paradigm. Different vectors of deployment of consciousness (self-consciousness) as a teacher’s personal formation in artistic education are considered, the positions which lay the theoretical basis for the development of value and sense-oriented learning, its multicultural, pedagogical and individual-personal contexts are formulated.

scholarly journals Modeling the Temperature Field in the Ground with an Installed Slinky-Coil Heat Exchanger

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4010
Author(s):  
Monika Gwadera ◽  
Krzysztof Kupiec
Keyword(s):  
Temperature Field ◽  
Heat Exchanger ◽  
Surface Temperature ◽  
Ground Surface ◽  
Heat Sources ◽  
Ground Surface Temperature ◽  
Coil Heat Exchanger ◽  
The Relationship ◽  
Temperature Responses ◽  
Coil Heat

In order to find the temperature field in the ground with a heat exchanger, it is necessary to determine temperature responses of the ground caused by heat sources and the influence of the environment. To determine the latter, a new model of heat transfer in the ground under natural conditions was developed. The heat flux of the evaporation of moisture from the ground was described by the relationship taking into account the annual amount of rainfall. The analytical solution for the equations of this model is presented. Under the conditions for which the calculations were performed, the following data were obtained: the average ground surface temperature Tsm = 10.67 °C, the ground surface temperature amplitude As = 13.88 K, and the phase angle Ps = 0.202 rad. This method makes it possible to easily determine the undisturbed ground temperature at any depth and at any time. This solution was used to find the temperature field in the ground with an installed slinky-coil heat exchanger that consisted of 63 coils. The results of calculations according to the presented model were compared with the results of measurements from the literature. The 3D model for the ground with an installed heat exchanger enables the analysis of the influence of miscellaneous parameters of the process of extracting or supplying heat from/to the ground on its temperature field.

President Obama and the Emergence of Islamophobia in Mass Partisan Preferences

2021 ◽  
pp. 106591292110072
Author(s):  
Michael Tesler
Keyword(s):  
Theoretical Basis ◽  
Independent Predictor ◽  
Survey Experiment ◽  
President Obama ◽  
Significant Independent Predictor ◽  
Cross Sectional ◽  
Panel Surveys ◽  
Voter Preferences ◽  
Nationally Representative ◽  
The Relationship

This article argues that the unusually large and persistent association between Islamophobia and opposition to President Obama helped make attitudes about Muslims a significant, independent predictor of Americans’ broader partisan preferences. After detailing the theoretical basis for this argument, the article marshals repeated cross-sectional data, two panel surveys, and a nationally representative survey experiment, to test its hypotheses. The results from those analyses show the following: (1) attitudes about Muslims were a significantly stronger independent predictor of voter preferences for congress in 2010–2014 elections than they were in 2004–2008; (2) attitudes about Muslims were a significantly stronger independent predictor of mass partisanship during Obama’s presidency than they were beforehand; and (3) experimentally connecting Obama to Democratic congressional candidates significantly increased the relationship between anti-Muslim sentiments and Americans’ preferences for Republican congressional candidates. The article concludes with a discussion of the implications of these results for American politics in the Trump era.

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