The effect of construction designs on temperature field of a roller compacted concrete dam — a simulation analysis by a finite element method

2003 ◽  
Vol 30 (6) ◽  
pp. 1153-1156 ◽  
Author(s):  
Y L Chen ◽  
C J Wang ◽  
S Y Li ◽  
L J Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Simulation Analysis ◽  
Thermal Simulation ◽  
Maximum Temperature ◽  
Mass Concrete ◽  
Roller Compacted Concrete ◽  
Rcc Dam ◽  
Element Method

In this paper a numerical simulation of the construction process of roller compacted concrete (RCC) dams is presented. The following features of construction of mass concrete have been considered: hydration heat, age, placing temperature, starting placement date, and placing speed. A 3-D finite element model of the Long-Tan RCC dam, which is to be built in the Guangxi Autonomous Region in China, was analyzed. Temperature distribution and evolution inside the RCC dam were calculated during and after the completion of the dam. Using FortranTM code, a 3-D thermal simulation analysis of a high RCC dam can be realized on a computer at the construction site. Based on the real factors during the construction period, engineers can predict the distribution of temperature in the RCC dam. Therefore, engineers can take appropriate measures to control concrete temperature to reduce thermal stress within the dam. The effects of the concrete placing temperature, construction speed, and starting date on the temperature are discussed. It has been found that the maximum temperature in a dam can be reduced by 20% through temperature control measures.Key words: RCC dam, thermal simulation analysis, finite element method, temperature field, construction schedule.

A Temperature Field Analysis for Contraction and Collapse of 72AU2 Hot-Rolled Steel

2015 ◽  
Vol 817 ◽  
pp. 653-660
Author(s):  
Han Jiang Hu ◽  
Ai Min Zhao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Field Analysis ◽  
Maximum Temperature ◽  
Field Calculation ◽  
Inside Diameter ◽  
Distance Position ◽  
Hot Rolled ◽  
Element Method

Hot rolled coil after winding cooled to room temperature in the storage room often takes 4 to 5 days. The process of coil cooling sometimes produces collapse defects in industrial applications. In this research, the cooling process after coiling of Shougang Group 72AU2 hot-rolled strip steel was taken as the research material. We used finite element method (FEM) software ABAQUS to analyze the temperature field of coil after coiling. At first, a temperature field model of hot-rolled coil during cooling was established by the finite element method. The simulation results show that, the maximum temperature difference is 206°C, when the cooling-time is about 50th min. The highest temperature node was about at 44% apart from inside diameter distance position in the thickness direction, and finally moved to the node which is at 26% apart from inside diameter distance position. Temperature field calculation considered the anisotropy of the heat transfer. The temperature of each node can be obtained by this simulation, which cannot be obtained from field measurements and experiments. Thereby this research has a significant impact on further research on the causes of the contraction and collapse.

Temperature Field Simulation Analysis of High Temperature Box

2011 ◽  
Vol 211-212 ◽  
pp. 925-929
Author(s):  
Wen Xue Qian ◽  
Xiao Wei Yin ◽  
Li Yang Xie
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
High Temperature ◽  
Thermal Field ◽  
Simulation Analysis ◽  
Field Simulation ◽  
Result Show ◽  
Design Objects ◽  
Element Method

High temperature box is wildly used in many fields. Alone with the increasing of the requirement temperature, the temperature of it becomes more and more high. But it is difficult to test the temperature when the temperature is greater than 2000°C. In this paper, the thermal field of high temperature box is analyzed by finite element method, the result show that the temperature satisfies the design objects.

scholarly journals Development of Simulation Program for Temperature Field of Mass Concrete Structures

2018 ◽  
Vol 38 ◽  
pp. 03020 ◽  
Author(s):  
Zheng Si ◽  
Qian Zhang ◽  
Ling Zhi Huang ◽  
Dan Yang
Keyword(s):  
Temperature Field ◽  
Concrete Structure ◽  
Relative Difference ◽  
Maximum Temperature ◽  
Mass Concrete ◽  
Field Calculation ◽  
Concrete Dam ◽  
Roller Compacted Concrete ◽  
Roller Compacted Concrete Dam ◽  
The Difference

Most existing temperature field calculation programs have relative defects. In the present paper, based on merits of ANSYS platform, a temperature field calculation program of mass concrete structure is developed and demonstrated. According to actual pouring progress and thermodynamic parameters, a roller-compacted concrete dam is simulated. The difference of maximum temperature between calculated and measured values of measuring points is less than 1.8°C. Furthermore, the relative difference is -5%–5%. This result shows that the calculation program developed based on ANSYS platform can simulate and calculate the temperature field of mass concrete structure.

scholarly journals Simulation of a Superconductor Fault Current Limiter with finite element method using A-V-H formulation

2020 ◽  
Author(s):  
Gabriel Dos Santos ◽  
Flávio Goulart dos Reis Martins ◽  
Bárbara Maria Oliveira Santos ◽  
Daniel Henrique Nogueira Dias ◽  
Guilherme Gonçalves Sotelo ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Simulation Analysis ◽  
Short Circuit ◽  
Normal Operation ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Current Limiter ◽  
H Formulation ◽  
Element Method

Nowadays, the complexity of electrical power systems is increasing. Consequently, the occurrence and the amplitude of the fault current are rising. This fault currents harm the substations’ electrical equipment. Besides, the growth in the fault current level is forcing the change of the circuit breakers to others with a higher interruption capability. A proposal to solve this problem is the fault current limiter (FCL). This equipment has low impedance in the normal operation and high impedance in a short circuit moment. Superconductors are an advantageous choice of material in this case, because of their properties. In order to simulate this equipment, the 2-D Finite Element Method (FEM) has been used. In this paper, a novel FEM simulation analysis of the saturated core Superconductor Fault Current Limiter (SFCL) is proposed using the A-V-H formulation. The current distribution in the superconducting coil is observed. The results are compared to the limited fault current measurements and simulations available in the literature.

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