scholarly journals Study on the Difference of Stability Calculation Between Numerical Simulation Analysis and Limit Equilibrium Methods--Take Huangmuya Landslide as an Example

2021 ◽  
Vol 9 (2) ◽  
pp. 12
Author(s):  
Zhao Changjun ◽  
Wu Liudong ◽  
Jiang Nan ◽  
Xu Minghui
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Limit Equilibrium ◽  
Stability Calculation ◽  
Limit Equilibrium Methods ◽  
The Difference

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.

Numerical Simulation Analysis of Beam-Reduction and Rib-Addition Strengthening Method of Hollow Slab Bridges

2012 ◽  
Vol 546-547 ◽  
pp. 57-65
Author(s):  
Guang Ning Pu ◽  
Li Jun Li ◽  
Yu Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Stress State ◽  
Simulation Analysis ◽  
Obvious Effect ◽  
Finite Element Software ◽  
Beam Method ◽  
Before And After ◽  
The Difference ◽  
Strengthening Method

For the purpose of the study of the mechanical mechanism of beam-reduction and rib-addition strengthening method as well as the difference between hinged beam method and rigidly connected beam method, finite element models are established for hollow slab bridge before and after strengthening respectively with the finite element software Ansys. The stress distributions on hollow slab bridge before and after strengthening are compared through numerical simulation analysis. The improvement effects of beam-reduction and rib-addition method on the transverse connection and stress state of hollow slab bridge are analyzed at the same time. It is proved that this strengthening method is of obvious effect and the bearing capacity of the existing bridge can be greatly enhanced. Meanwhile, the result of numerical simulation analysis shows that the beam-reduction and rib-addition hinged beam method and rigidly connected beam method have the similar effects. Both of them result in much improvement of transverse distribution and enhancement of transverse connection. But the rigidly connected beam method has a better overall rigidity and a tighter transverse connection. Its improvement effect on the stress state of the old beam slab is superior to that of the hinged beam method.

Numerical Simulation Analysis on Buckling Load of Large Combined Cylindrical Shells

2008 ◽  
Author(s):  
Zhiping Chen ◽  
Ming Zeng ◽  
Chu-Lin Yu ◽  
Jinping Zhu
Keyword(s):  
Numerical Simulation ◽  
Hoop Stress ◽  
Simulation Analysis ◽  
Cylindrical Shells ◽  
Great Influence ◽  
Buckling Load ◽  
Critical Buckling Load ◽  
Buckling Behavior ◽  
The Difference ◽  
Almost All

To comply with the uniform-strength theory, almost all large tanks are made by welding unequal-thickness cylindrical shell courses together. This structure can be considered as a kind of geometry imperfection of tank walls, which has a great influence on buckling behavior and critical load of tank walls. To obtain the related critical buckling load and to verify the effect regularity on bulking due to hoop stress in various combined unequal-thickness cylindrical shells, the numerical simulation was adopted to analyze the buckling behavior with different loads. The results show that the characteristic factors of unequal-thickness structure can reduce the critical buckling load significantly, such factors as shell layers and the difference in thickness of adjacent shell courses are the most dominant.

LIFT AND DRAG CORRELATIONS FOR AN AIRFOIL ARRAY THROUGH NUMERICAL SIMULATION ANALYSIS.

2019 ◽  
Author(s):  
Luan Labigalini ◽  
Ricardo Salvo ◽  
Rafael Sene de Lima ◽  
Ismael Marchi Neto ◽  
Rodrigo Corrêa da Silva
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Lift And Drag

Effect Analysis of Nitrogen Injection on the Variation of “Oxidation Zone” in Coal Mine Gob Based on Numerical Simulation

2016 ◽  
Vol 9 (1) ◽  
pp. 47-54
Author(s):  
Jing Shen ◽  
Mingran Chang
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Heat Dissipation ◽  
Spontaneous Combustion ◽  
Oxidation Zone ◽  
Effect Analysis ◽  
Mine Fire ◽  
Nitrogen Injection ◽  
The Difference ◽  
Residual Coal

One of the main reasons for coal mine fire is spontaneous combustion of residual coal in gob. As the difference of compaction degree of coal and rock, the underground gob can be considered as a porous medium and divided into “three zones” in accordance with the criteria. The “three zones” are “heat dissipation zone”, “oxidation zone” and “choking zone”, respectively. Temperature programming experiments are taken and numerical simulation with obtained experimental data is utilized to analyze the distribution of “three zones” in this paper. Different width and depth of “oxidation zone” are obtained when the inlet air velocity is changed. As the nitrogen injection has inhibition effect on spontaneous combustion of residual coal in gob, nitrogen is injected into the gob. The widths of “oxidation zone” are compared before and after nitrogen injection. And ultimately the optimum location and volume of nitrogen injection are found out.

Numerical simulation analysis on solute redistribution of In–1 wt% Sn alloy during multipass vertical zone refining process

2021 ◽  
Vol 565 ◽  
pp. 126156
Author(s):  
Mingxu Li ◽  
Qingle Tian ◽  
Meizhen Wu ◽  
Jubo Peng ◽  
Jiatao Zhang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Refining Process ◽  
Zone Refining ◽  
Solute Redistribution ◽  
Vertical Zone

scholarly journals Calibration of Finn Model and UBCSAND Model for Simplified Liquefaction Analysis Procedures

2021 ◽  
Vol 11 (11) ◽  
pp. 5283
Author(s):  
Jui-Ching Chou ◽  
Hsueh-Tusng Yang ◽  
Der-Guey Lin
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Structural Damage ◽  
Simulation Analysis ◽  
Constitutive Models ◽  
Soil Liquefaction ◽  
Analysis Procedure ◽  
Liquefaction Resistance ◽  
Simplified Procedure ◽  
Liquefaction Analysis

Soil-liquefaction-related hazards can damage structures or lead to an extensive loss of life and property. Therefore, the stability and safety of structures against soil liquefaction are essential for evaluation in earthquake design. In practice, the simplified liquefaction analysis procedure associated with numerical simulation analysis is the most used approach for evaluating the behavior of structures or the effectiveness of mitigation plans. First, the occurrence of soil liquefaction is evaluated using the simplified procedure. If soil liquefaction occurs, the resulting structural damage or the following mitigation plan is evaluated using the numerical simulation analysis. Rational and comparable evaluation results between the simplified liquefaction analysis procedure and the numerical simulation analysis are achieved by ensuring that the liquefaction constitutive model used in the numerical simulation has a consistent liquefaction resistance with the simplified liquefaction analysis procedure. In this study, two frequently used liquefaction constitutive models (Finn model and UBCSAND model) were calibrated by fitting the liquefaction triggering curves of most used simplified liquefaction analysis procedures (NCEER, HBF, JRA96, and T-Y procedures) in Taiwan via FLAC program. In addition, the responses of two calibrated models were compared and discussed to provide guidelines for selecting an appropriate liquefaction constitutive model in future projects.

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