Optimum Design of CFG Pile Compound Foundation Based on Numerical Simulation Method

2014 ◽  
Vol 578-579 ◽  
pp. 346-350 ◽  
Author(s):  
Hai Ying Cao ◽  
Yun Fei Liu
Keyword(s):  
Numerical Simulation ◽  
Computational Models ◽  
Simulation Method ◽  
Simulation Software ◽  
Design Parameters ◽  
Conventional Design ◽  
Bearing Force ◽  
The One ◽  
Pile Length ◽  
Cfg Pile

Aiming at the phenomenon of empirical selection in CFG pile compound foundation's design parameters, the computational models considering different pile length were built by numerical simulation software PLAXIS, whose background came from an actual highway engineering. The relation curves were plotted and analyzed concerning pile length with subgrade horizontal deformation, subgrade settlement, integral stability of embankment and end bearing force of pile, in the light of deformation and stress cloud graphs from post-processing results. The feasibility of pile length optimization in conventional design was judged synthetically according to above mentioned curves, and the optimized pile length was 2m shorter than the one of conventional design, which cut down construction cost. The construction practice indicates that there are not abnormal occurrence in subgrade treatment section during period of traffic operation.

Numerical Simulation Method Ascertaining Slope Stabilization Anti-Slippery Pile's Basic Parameters

2012 ◽  
Vol 594-597 ◽  
pp. 222-225
Author(s):  
Wen Juan Feng ◽  
Xiao Dong Ju ◽  
Zheng Sheng Zou
Keyword(s):  
Numerical Simulation ◽  
Safety Factor ◽  
Limit Equilibrium ◽  
Simulation Method ◽  
Simulation Software ◽  
Strength Reduction ◽  
Slope Stabilization ◽  
Limit Equilibrium Methods ◽  
Basic Parameters ◽  
Shear Strength Reduction

Although anti-slide pile take a key position in slope-treating measures, the method of designing is far from perfect. The methods used in actual projects are based on the rigid body limit equilibrium methods. There is a tendency to using numerical methods in the progress of pile-designing. The safety factor of landslide is calculated according to shear strength reduction theory in the numerical simulation software. Using the shearing forces on pile and the safety factor can ascertain the position of anti-slide piles, the area and distance of piles. For numerical simulation can well perform the simulation slope moving and the load on piles and can give a more reasonable designing.

Heat Exchange Calculation of a Regenerative Air Heater with Numerical Simulation Method

2013 ◽  
Vol 860-863 ◽  
pp. 1416-1419
Author(s):  
Ri Guang Wei ◽  
Zhen Xiao Qu ◽  
Jian Qiang Gao
Keyword(s):  
Numerical Simulation ◽  
Simulation Method ◽  
Calculation Model ◽  
Design Parameters ◽  
Practical Calculation ◽  
Air Preheater ◽  
Air Heater ◽  
Pulverized Coal Boiler ◽  
Set Up ◽  
Coal Boiler

According to the structure and working principle of rotary air preheater,the heat transfer calculation model is set up with reasonable simplification. Combining with the design parameters of the rotary air preheater of a 400 t/h pulverized coal boiler unit ,the results of practical calculation show that the said thermodynamic calculation method not only has higher precision of calculation,but also can get the temperature distributions of the gas, air and heat surface in each cross-section of the rotary air preheater. The result of numerical simulation calculation tallies well with the original designed data. It can be used for the heat calculation both two-sectorial and three-sectorial air heater; it can be used for performance analysis of the regenerative air heater.

scholarly journals Structure parameter optimization and bearing limit analysis of the expansion unit of three-roller tube expander

2020 ◽  
Vol 7 (5) ◽  
pp. 191630
Author(s):  
Gang Bi ◽  
Zhan Qu ◽  
Zhenquan Wang ◽  
Liangbin Dou ◽  
Mengmeng Li
Keyword(s):  
Numerical Simulation ◽  
Simulation Method ◽  
Gauge Length ◽  
Structure Design ◽  
Design Parameters ◽  
Roller Tube ◽  
Unit Structure ◽  
Drilling Technology ◽  
Expansion Force ◽  
Proper Length

The critical technical issues for the structure design of three-roller tube expander were first studied and analysed in this paper. Then, the major design parameters of the expansion unit structure and the bearing limit of 12¼″ three-roller tube expander were optimized and investigated by finite-element numerical simulation method. Results from study show that the required expansion force increases when the taper angle of the roller outer surface gets larger, taking the axial expansion force as the quantitative indicators. It is suggested that the roller tape angle of the expansion unit should be in the range of 9–12° considering the proper length of the roller and the non-self-locking tube expansion process. The required expansion force of the bellows first decreases and then increases when the gauge length of the expansion unit becomes longer. The optimal value of the gauge length is 50 mm considering the proper length of the roller. And according to the numerical simulation results, the designed three-roller tube expander meets the strength requirements. The results of this study are of great significance to the expend bellows drilling technology.

Numerical Simulation Techniques for Hollow Vacuum Forming of Double-Layered Plastic Sheets

2010 ◽  
Vol 154-155 ◽  
pp. 68-73
Author(s):  
Bin Gao ◽  
Bai Zhong Wu
Keyword(s):  
Numerical Simulation ◽  
Theoretical Calculation ◽  
Temperature Variation ◽  
New Products ◽  
Simulation Method ◽  
Simulation Software ◽  
New Materials ◽  
Forming Process ◽  
Simulation Techniques ◽  
Vacuum Forming

Products made from double-layered hollow vacuum forming are widely used for their various advantages. The hollow vacuum forming process has been studied in this paper. Numerical simulation method for the hollow vacuum forming process of double-layered plastic sheets has been introduced by the simulation software Polyflow, which is suitable for viscoelasticity fluid bodies. This method can vividly and intuitively estimate the thickness, temperature variation and distribution in the double-layered vacuum forming processes. Based on this method, reliably theoretical calculation data can be provided to design the reasonable vacuum forming process for double-layered vacuum forming of new materials or new products. The proposed method has been verified to be applicable and effective by prototype fabrications.

Fluid-Solid Coupling Numerical Simulation Analysis of Impermeable Rock Mining Seam Floor Failure

2014 ◽  
Vol 1010-1012 ◽  
pp. 1527-1530
Author(s):  
Chun Jie Song ◽  
Cheng Fan
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Water Inrush ◽  
Three Dimensional ◽  
Deep Understanding ◽  
Simulation Method ◽  
Relevant Information ◽  
Simulation Software ◽  
Pressurized Water ◽  
Floor Failure

Based on a deep understanding of FLAC 3D numerical simulation software and the solid-liquid coupling theory and calculation method, this paper established a mining three-dimensional mechanical model under the pressurized water .Using the numerical simulation method, this paper systematically analysis deformation Laws of stress distribution of mining floor, bottom stress, its plastic zone and floor failure depth. By analyzing water inrush flow-solid coupling seepage problem under the conditions of coal mining, and compares with relevant information, verify the rationality of the existing theories and engineering measures, provide a theoretical basis for seeking security and economic exploitation of technical measures.

Design Optimization of Axial-Flow Pump Blades Based on iSIGHT

2015 ◽  
Author(s):  
Lijian Shi ◽  
Fangping Tang ◽  
Rongsheng Xie ◽  
Lilong Qi ◽  
Zhengdong Yang
Keyword(s):  
Numerical Simulation ◽  
Numerical Optimization ◽  
Optimization Design ◽  
Axial Flow ◽  
Optimization Method ◽  
Simulation Software ◽  
Multidisciplinary Optimization ◽  
Design Parameters ◽  
Axial Flow Pump ◽  
Flow Pump

This paper research the influence of cascade dense degree and airfoil placed angle on hydralic performance of axial flow pump blades. Which combines the numerical optimization technology with the advanced CFD simulation technique, replaces designers’ experience by mathematical models for controlling of the blade design direction. Finally, a platform for of the optimization design of axial-flow pump blades is built in this paper. The platform which based on the multidisciplinary optimization software iSIGHT is to design and optimize the axial flow blades. The automatic optimization design platform for axial-flow blade was established, in which the parameterization modeling, mesh, flow computation and numerical optimization are combined together. The use of the numerical simulation software CFD for disciplinary analysis improved the reliability and accuracy of the results of the prediction model. Found the approximate geometric design parameters of the design conditions based on numerical simulation, and the technology of numerical optimization was used for constrained optimized analysis based on these parameters. Optimized impeller efficiency improved about 0.7% while satisfying the constraint condition, shows that the optimization method for axial flow blade base on iSIGHT platform is effective and feasible. Meanwhile, the optimization method can greatly shorten the design cycle, reduce design cost optimization.

Modeling and Simulation of Combustion Chamber

2014 ◽  
Vol 513-517 ◽  
pp. 3543-3547
Author(s):  
Run Ze Duan ◽  
Zhi Ying Chen ◽  
Li Jun Yang
Keyword(s):  
Numerical Simulation ◽  
Optimization Design ◽  
Simulation Software ◽  
Design Parameters ◽  
Air Distribution ◽  
Work Process ◽  
Work Condition ◽  
Oil Fuel ◽  
Fuel Burner

The work process of oil fuel burner consists of atomization and combustion of oil. In this process, different atomization and air-distribution methods would affect the quality of combustion and then bring out problems of life-span of the burner, energy efficiency and environmental pollution. Therefore, in this paper, different air distribution devices and different sizes of nozzles are designed, and the numerical simulation software, Fluent 6.3, was employed to simulate the flow field of different conditions in combustor,. Through the simulation, the best work condition was achieved, which could help to provide optimization design parameters of the combustor.

The Simulation and Experiment Study on the Gas Flow in the No-Loaded and Cold Vacuum High-Pressure Gas Quenching Furnace

2011 ◽  
Vol 48-49 ◽  
pp. 1310-1314
Author(s):  
Zhi Jian Wang ◽  
Xiao Feng Shang
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Gas Flow ◽  
Flow Distribution ◽  
Simulation Method ◽  
Flow State ◽  
Gas Quenching ◽  
Simulation And Experiment ◽  
Simulation Results ◽  
The One

In order to learn gas flow state in the vacuum high pressure gas quenching furnace, this paper simulates and tests the gas flow under the no-loaded and cold state. Hot wire anemometer is used to measure the speeds of some feature points, on the one hand to provide boundary conditions for the numerical simulation, and on the other hand to compare with the numerical simulation results. FLUENT software is used to simulate the gas flow of nozzle-type vacuum high-pressure gas quenching furnace. The results show that at the center of the furnace appears high-pressure low-speed zone in which is resulted by the gas collision there, and the vortex also appears in the area around the furnace. The results mean that the cooling rate of works will be slow there. Different exit velocities of five nozzles cause the uneven flow distribution, which will affect the cooling uniformity of works. The comparison between the simulation results and the measured results shows that the error is within 10%. It means that numerical simulation method to predict gas flow is feasible and the results are reliable in high pressure gas quenching furnace.

Simulation of Earthwork Load-and-Carry System Based on GPSS World

2014 ◽  
Vol 1044-1045 ◽  
pp. 578-584
Author(s):  
Bing Heng Lai ◽  
Chang Hua Li
Keyword(s):  
Discrete Event ◽  
Simulation Method ◽  
Simulation System ◽  
Simulation Software ◽  
Path Optimization ◽  
Optimization Strategy ◽  
Recycling Process ◽  
Event Simulation ◽  
Event System ◽  
The One

Focusing on the complexity and a large number of variable factors of earthworks, to simulate earthworks with discrete event system simulation method is very effective, on the basis of analyzing the current developed simulation software, GPSS World discrete event simulation system was used in the simulation; For the one-way path optimization in the Earthwork Load-and-Carry System, an optimization strategy was put forward and put into a series of recycling process including simulation, verification, modification, re-simulation and re-verification with the simulation system, to achieve the optimization of the simulation model. Finally, through the verification of simulation concrete example, the method is proved effective and feasible, and has a wide applicability and a strong guiding significance for actual projects.

Numerical Simulation of Influence of Vegetation on Atmospheric Diffusion of Radon Emanating from Uranium Tailings Impoundment

2012 ◽  
Vol 253-255 ◽  
pp. 1009-1013 ◽  
Author(s):  
Xiao Yong Peng ◽  
Qing Fang Xie ◽  
Fen Wan ◽  
Shuai Huang ◽  
Xin Zhang
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Radon Concentration ◽  
Simulation Method ◽  
Atmospheric Diffusion ◽  
Local Pollution ◽  
Tailings Impoundment ◽  
Radon Diffusion ◽  
The One ◽  
Uranium Tailings

Using the numerical simulation method, this thesis studies the radon concentration distribution in downwind area of the flat ground uranium tailings impoundment with and without vegetation on the beach face under the wind speed of 0.5, 1.0, 2.0 and 4.0m/s. The numerical results show that the radon concentration decreases gradually with the increasing wind speed and distance from uranium tailings impoundment. As the wind speed is 0.5m/s, the radon concentration is higher in downwind area of uranium tailings impoundment, and accumulation range is larger and local pollution also becomes more serious. However, radon concentration and accumulation range falls rapidly with wind speed increased to 4.0m/s. At the same wind speed, radon concentration under the condition of beach face with vegetation is higher than the one without vegetation within 600m range of uranium tailings impoundment along the downwind direction, but radon concentration is lower under the condition of beach face with vegetation out of 600m range. It illustrates that vegetation can inhibit radon diffusion to some extent.

Sign in / Sign up

Export Citation Format

Share Document