Numerical Study of the Stress State of High Earth Dams under Basic Loads

2020 ◽  
Vol 12 (8) ◽  
pp. 142-146
Author(s):  
Klara Salyamova ◽  
Khusanboy Turdikulov
Keyword(s):  
Stress State ◽  
Numerical Study ◽  
Earth Dams

scholarly journals ESTIMATION OF PIPELINE SYSTEMS FLEXIBLE CONNECTING PIPE STRENGTH PROPERTIES BASED ON NUMERICAL STUDY OF STRAIN-STRESS STATE

2020 ◽  
Vol 8 (1) ◽  
pp. 082-089
Author(s):  
M. Yu. Sergaeva ◽  
◽  
I. M. Strokov ◽  
А. А. Sergaev ◽  
◽  
...  
Keyword(s):  
Stress State ◽  
Numerical Study ◽  
Strength Properties ◽  
Pipeline Systems ◽  
Strain Stress

В настоящее время для трубопроводных систем разрабатываются виброизолирующие конструкции на основе резинокордных оболочек. Основная роль компенсирующего патрубка - это исключение передачи усилий от действия давления рабочей среды в полости трубопровода на фланцы и присоединяемые механизмы. Для оценки прочностных характеристик резинокордного патрубка на основе численного исследования используется трехмерная модель, армированная балочными элементами. В результате проведен расчет напряженно-деформированного состояния резинокордной оболочки и фланцевого соединения патрубка. Определенные аспекты исследования необходимо учитывать при проектировании и эксплуатации конструкций патрубков на основе армированных оболочек.

scholarly journals Numerical study of the stress state of a deformation twin in magnesium

2015 ◽  
Vol 84 ◽  
pp. 349-358 ◽  
Author(s):  
M. Arul Kumar ◽  
A.K. Kanjarla ◽  
S.R. Niezgoda ◽  
R.A. Lebensohn ◽  
C.N. Tomé
Keyword(s):  
Stress State ◽  
Deformation Twin ◽  
Numerical Study

Numerical study of the stress state of the bodies of coal-pulverizer drums

1985 ◽  
Vol 17 (3) ◽  
pp. 441-443
Author(s):  
A. N. Abrosov ◽  
V. A. Artemenko ◽  
Ya. M. Grigorenko ◽  
A. T. Vasilenko ◽  
G. K. Sudavtsova ◽  
...  
Keyword(s):  
Stress State ◽  
Numerical Study

scholarly journals Assessment of stress state and dynamic characteristics of plane and spatial structure

2021 ◽  
Vol 2070 (1) ◽  
pp. 012156
Author(s):  
Z. Urazmukhamedova ◽  
D. Juraev ◽  
M. Mirsaidov
Keyword(s):  
Stress State ◽  
Dynamic Characteristics ◽  
Eigenvalue Problems ◽  
Variational Equation ◽  
Design Stage ◽  
Algebraic Equations ◽  
Earth Dams ◽  
Low Frequencies ◽  
Modes Of Vibration ◽  
Spatial Test

Abstract This study is devoted to the assessment of the stress state and dynamic characteristics of various structures. The actual task at the design stage is to determine the parameters of a structure. In this article, a mathematical model was developed for assessing the stress state and dynamic characteristics of plane and spatial structures based on the Lagrange variational equation using the d’Alembert principle. The variational problem for the structures considered by the finite element method leads to the solution of nonhomogeneous algebraic equations or to the solution of algebraic eigenvalue problems. To assess the adequacy of the model and the accuracy of the numerical results obtained, a plane and spatial test problem with an exact solution was solved. Using the proposed model, the eigenfrequencies and modes of oscillations of the gravitational and earth dams (296 m high) of the Nurek reservoir were investigated. At that, it was revealed that in the natural modes of vibration of earth dams, the greatest displacements under low frequencies are observed at the crest part or at the middle of the slopes.

scholarly journals A numerical study on dynamic shear rupture along frictional faults

2015 ◽  
Vol 25 (1) ◽  
pp. 69-86 ◽  
Author(s):  
Dandan Xu ◽  
Zhanli Liu ◽  
Xiaoming Liu ◽  
Zhuo Zhuang
Keyword(s):  
Stress State ◽  
Numerical Study ◽  
Economic Loss ◽  
Path Selection ◽  
Dynamic Shear ◽  
The Finite Element Method ◽  
Dynamic Rupture ◽  
Shear Rupture ◽  
Main Fault ◽  
Rupture Mechanism

The Wenchuan earthquake (Sichuan province, China, 2008) was caused by the dynamic rupture of Longmen Mountain fault. Such catastrophic disaster had led to a huge damage of life as well as major economic loss. The Longmen Mountain fault consisted of three faults with complex geometries, which gathered together as a main fault underground. The dynamic shear ruptures along the faults including bends and branches are frequently observed during earthquakes. In this study, the finite element method (FEM) is adopted to simulate the dynamic ruptures along both straight and branched faults, which are considered as frictional interfaces. A slip-weakening friction law is used to describe the interface behavior along faults. For the straight fault, the effects of pre-stress state and nucleation parameters on the dynamic shear rupture process are investigated; for the branched faults, the effects of pre-stress state and fault geometry on the rupture path selection are presented. The results are used to explain the rupture mechanism of Longmen Mountain fault during the earthquake.

scholarly journals Numerical Study on Erosion Wear and Strength of Main Gas Pipelines Bends

2021 ◽  
Vol 71 (1) ◽  
pp. 27-40
Author(s):  
Doroshenko Yaroslav ◽  
Kogut Galyna ◽  
Doroshenko Yuliia ◽  
Tarayevs’kyy Oleh ◽  
Pyrig Taras
Keyword(s):  
Stress State ◽  
Numerical Study ◽  
Three Dimensional ◽  
Wall Stress ◽  
Internal Cavity ◽  
Erosion Wear ◽  
Gas Pipelines ◽  
Wear Process ◽  
Simulation Based ◽  
Dimensional Simulation

Abstract The purpose of this work is to ensuring the strength of main gas pipelines bends by studying the peculiarities of single-phase and multiphase flows movement through the internal cavity, the processes of erosion wear and the wall stress state. The problem of synergistic influence of gas-dynamic processes (uneven pressure distribution in the internal cavity), temperature difference and erosion wear on the stress state of the bends of main gas pipelines was solved by numerical simulation. Based on the results of simulation the processes of bends erosion wear, an algorithm for three-dimensional simulation of bend walls erosion defects was developed. The complex three-dimensional geometric shape of the erosion defects of the bend wall varied according to the rate of erosion wear process. This algorithm made it possible to determine the regularities for the influence of the bend erosion defects magnitude on bends stress state. It was established that considering the maximum depth of bend erosion defects 9.6 mm, 10.5 mm and 11.9 mm, the equivalent stresses in the deepest places of the erosion defect were greater than on the concave side of the bend and in straight sections of the pipeline.

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