The Finite Element Analysis of the Column of Wave-Power Generating Device

2012 ◽  
Vol 614-615 ◽  
pp. 546-549
Author(s):  
Yan Jun Liu ◽  
Xing Wang Sun ◽  
Bo Zheng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Impact Force ◽  
Safety Performance ◽  
Wave Power ◽  
Wave Load ◽  
Wave Impact ◽  
Element Analysis ◽  
Finite Element Software ◽  
The Finite Element Analysis

The columnof the wave-power generating device is analysed through theoretical analysis using finite element software. The deformation and stress under maximum wave impact force is calculated by harmonic analysis, the result of which indicates that deformation and stress of the maincolumn, which under huge wave impact calculated by Morison theory, is very small. The stress of the column generated by wave load is less than its material yield strength, which indicates that the safety performance meets the requirements.

scholarly journals Simulation and Analysis of Fluid-Solid Coupling of Wave Impact Sandcastle Based on COMSOL

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Zhen Ouyang ◽  
Ke Wang ◽  
Zihao Yu ◽  
Kaikai Xu ◽  
Qianyu Zhao ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Coupling Model ◽  
Complex Problem ◽  
Wave Impact ◽  
Element Analysis ◽  
Quantitative Calculation ◽  
The Finite Element Analysis ◽  
The Impact

It is a complex problem to study the interaction between sand castle and flowing water, which needs to consider the complexity of seawater flow and the stress of sand castle structure. The authors use the fluid-solid coupling model to establish the connection between the fluid field and the structural mechanical field, and use the finite element analysis to complete the simulation modeling of the transient process of wave impact and sandcastle foundation deformation. This paper analyzes the stress and the first principal strain of the sand castle foundation in the direction of flow velocity when the sand castle foundation is hit by waves, as a method to judge the strength of the sand castle.The best shape: the boundary value of sand castle collapse caused by strain have been determined, so as to obtain the maximum stress that a sand castle foundation can bear before collapse, which makes it possible to use the fatigue strength calculation theory of sand castle solid to carry out the quantitative calculation of sand castle durability. At the same time, the impact of waves is abstracted as wave motion equation. Finally, the finite element analysis technology is adopted to calculate the main strain of sandcastles of different shapes under the impact of the same wave, and through the comparison of the main strain, the authors get the sandcastle shape with the strongest anti-wave impact ability, which is the eccentric circular platform body.Affected by rain: the authors considered the effect of rainwater infiltration on the sandcastle's stress, and simplified the process of rain as a continuous and uniform infiltration of rain into the sandcastle's surface. The rain changes the gravity of the sand on the castle's surface. Simulation analysis is adopted to calculate the surface stress of sand castle with different degree of water seepage and different geometry. By comparison, it has been found that the smooth cone is more able to withstand the infiltration of rain without collapse. 

Stochastic Methods Applied to Structural Mechanics

2018 ◽  
pp. 199-220
Author(s):  
Siham Ouhimmou
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Global Optimization ◽  
Transformation Method ◽  
Stochastic Methods ◽  
Element Analysis ◽  
Local Method ◽  
Structural Problem ◽  
Finite Element Software ◽  
The Finite Element Analysis

Uncertainty modelling with random variables motivates the adoption of advanced PTM for reliability analysis to solve problems of mechanical systems. Probabilistic transformation method (PTM) is readily applicable when the function between the input and the output of the system is explicit. When these functions are implicit, a technique is proposed that combines finite element analysis (FEA) and probabilistic transformation method (PTM) that is based on the numerical simulations of the finite element analysis (FEA) and the probabilistic transformation method (PTM) using an interface between finite element software and Matlab. Structure problems are treated with the proposed technique, and the obtained results are compared to those obtained by the reference Monte Carlo method. A second aim of this work is to develop an algorithm of global optimization using the local method SQP. The proposed approach MSQP is tested on test functions comparing with other methods, and it is used to resolve a structural problem under reliability constraints.

Numerical Evaluation of the Active Earth Pressure Acting on Rigid Retaining Walls

2012 ◽  
Vol 204-208 ◽  
pp. 410-413
Author(s):  
Shi Lun Feng ◽  
Jun Li ◽  
Pu Lin Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Maximum Error ◽  
Active Earth Pressure ◽  
Element Analysis ◽  
Finite Element Software ◽  
Strain Behaviour ◽  
The Finite Element Analysis

The active earth pressure on rigid retaining wall is analyzed using the finite element software ABAQUS. The fill behind the wall is sand and the Mohr–Coulomb constitutive model was used to model the stress–strain behaviour of soils.The finite element analysis results were compared with the Rankine results. The maximum error of the results is about 10% and the finite element analysis result is bigger. So the result obtained from the finite element method could safely be used in actual projects.

ANALYTICAL AND EXPERIMENTAL STUDIES ON 400 kV S/C PORTAL-TYPE GUYED TOWERS

2009 ◽  
Vol 09 (01) ◽  
pp. 85-106
Author(s):  
N. PRASAD RAO ◽  
S. J. MOHAN ◽  
R. P. ROKADE ◽  
R. BALA GOPAL
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Studies ◽  
Ground Level ◽  
Test Results ◽  
Element Analysis ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Guyed Towers ◽  
Analytical Behavior

The experimental and analytical behavior of 400 kV S/C portal-type guyed towers under different loading conditions is presented. The portal-type tower essentially consists of two masts extending outward in the transverse direction from the beam level to the ground. In addition, two sets of guys connected at the ground level project outward along the longitudinal axes and converge in the transverse axes. The experimental behavior of the guyed tower is compared with the results of finite element analysis. The 400 kV portal-type guyed towers with III and IVI type insulator strings are analyzed using finite element software. Full scale tower test results are verified through comparison with the results of the finite element analysis. The initial prestress in the guys is allowed to vary from 5% to 15% in the finite element modeling. The effect of prestress variation of the guys on the tower behavior is also studied.

The Finite Element Analysis Concerning the Slip Coat of Workover Rig

2013 ◽  
Vol 483 ◽  
pp. 297-300
Author(s):  
Jia Qi Jin ◽  
Ye Yuan ◽  
Xian Rong Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Static Analysis ◽  
Allowable Stress ◽  
Element Analysis ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Lifting System

Based on the finite element analysis of the slip coat in the compulsory lifting system of hyper-thermal snubbing operation injected by steam, the static analysis with regard to the slip coat is undoubtedly employed taking advantage of the finite element software. And then, the failure forms are deduced and the maximum allowable stress is calculated by analyzing the stress distribution.

Fully Coupled Fatigue Damage Analysis of Welded Steel Bridge Member under Traffic Loading

2007 ◽  
Vol 348-349 ◽  
pp. 761-764
Author(s):  
Tai Quan Zhou ◽  
Yuan Hua ◽  
Tommy Hung Tin Chan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Damage ◽  
Damage Evolution ◽  
Damage Mechanics ◽  
Element Analysis ◽  
Coupled Method ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Fully Coupled

The finite element analysis fully coupled fatigue damage evolution is implemented on the user subroutine UMAT of the finite element software ABAQUS. The fully coupled method developed with damage mechanics and the finite element analysis is performed on calculation of fatigue damage accumulation of the critical welded member in the Tsing Ma Bridge. The calculated result shows that the fatigue damage in the critical welded member is accumulated in the region of toe of welding. The value of faitgue life calculated by the fully coupled method is smaller than that by the uncoupled method, which suggests that there exists interaction between the fatigue damage evolution and the structural response. The linear Miner’s Law is widely used however conservative for the evaluation of fatigue life of bridge on service. The above results provide feasible method for accurate evaluation of fatigue damage in bridge components based on the hot spot stress analysis and the damage mechanics theory.

The Finite Element Analysis on Seismic Performance of Ring Beam and Constructional Column with Different Storey in Masonry Building

2014 ◽  
Vol 919-921 ◽  
pp. 1016-1019 ◽  
Author(s):  
Xue Yu Xiong ◽  
Rong Jun Xue ◽  
Sen Zhang ◽  
Li Jun Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Response ◽  
Material Model ◽  
Masonry Building ◽  
Element Analysis ◽  
Seismic Region ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Constructional Column

The masonry building takes a majority of town housings in these areas. Unlike the experimental study, the Finite Element Analysis is an important part for better comprehension of the finite element method and can reduce the investment and manpower. The aim of this paper is to simulate the structural response from the variety of masonry buildings under earthquake excitations by using finite element software called ABAQUS. There are four models of the masonry building with different storey, which include the one without constructional column and ring beam, with constructional column only, with ring beam only and with constructional column and ring beam simultaneously. In the process of modeling, we adopt the integrated model and regard walls, constructional columns, slabs and steels as homogenous continuums. Furthermore, we adopt concrete damaged plasticity material model to simulate the material of building and input El Centro earthquake wave N-S component. The result of analysis shows that setting ring beams or constructional columns can significantly improve the integrity of the building and reduce the mises stress on foundation. The result of analysis has a significant guidance on masonry building construction in seismic region.

Simulation Analysis of Chemically Bonded Anchors in ABAQUS

2017 ◽  
Vol 744 ◽  
pp. 174-178
Author(s):  
Tian Jiao Chen ◽  
Yong Quan Wang ◽  
Wahab Abdul Ghafar
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Bond Strength ◽  
Growth Stage ◽  
Element Analysis ◽  
Bond Slip ◽  
Finite Element Software ◽  
Plastic Damage ◽  
The Finite Element Analysis

At present, the finite element analysis has been an effective method to study the mechanical properties of steel bar drawing. In this paper, finite element analysis of the influence of bond strength on anchorage performance with concrete plastic damage model based on nonlinear analysis in ABAQUS was carried out. The finite-element analysis model of the single bar was established by using the finite element software ABAQUS. The Spring2 nonlinear spring element was introduced to simulate the interface of concrete and adhesive. Chemical anchorage bond slip constitutive model was determined by Spring2 element real constants. The nonlinear characteristics of concrete materials under the single reinforcement drawing could be described with the combination of the concrete plastic damage constitutive mode and nonlinear finite element methods. The nonlinear behavior of concrete under uniaxial tension of the action, especially the crack and stress distribution, could be accurately described. In order to study the influence of adhesive bond strength of chemically-bonded rebar mechanical properties, the constitutive relation of the bonded rebar slip of test results was referenced. The nonlinear property of spring was assigned by the bond slip relationship, embodied in the F-D curve of the spring. In order to analysis the influence of bond strength on anchorage performance, the slope of linear growth stage and the peak of nonlinear growth stage in bond slip relationship curve were changed.

The Finite Element Analysis of Longmen Type Frame on Large Thickness Flame Cutting Machine

2013 ◽  
Vol 274 ◽  
pp. 253-256
Author(s):  
Yong Qiu Chen ◽  
Yu Lai Ma ◽  
Yong Kui Han
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Model Simplification ◽  
Element Analysis ◽  
Large Thickness ◽  
Finite Element Software ◽  
Weakest Link ◽  
Cutting Machine ◽  
The Finite Element Analysis ◽  
Main Factors

In this paper, finite element analysis was used to study the whole stiffness on the Longmen type frame by Pro/MECHANICA, the model simplification and mesh principle were elaborated, as well as the advantage of Pro/MECHANICA with adaptive P-method technology and with the traditional finite element software with non-adaptive H-method technology. The weakest link of the whole stiffness on the Longmen type frame was found out. The three main factors of affecting the whole stiffness was put forward to.

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