Simulation of Loads on the Carrying Structure of an Articulated Flat Car in Combined Transportation

The article presents the findings of the research into loading on the carrying structure of an articulated flat car under combined transportation. The refined data of dynamic loads on the carrying structure of a flat car under train ferry transportation, as well as the main loading modes in rail track operation were determined by mathematical modeling. The adequacy of the models developed was checked with an F-test. The results of the calculation conducted made it possible to conclude that the hypothesis on adequacy of the models is not rejected. The peculiarities of the structural strength modeling for a flat car within operational loading diagrams are given. The graphics works were conducted in Solid Works. The capacity analysis was conducted by the finite element method in CosmosWorks. The 09G2S steel was used as a construction material. It is determined that the maximum equivalent loads in the flat car support structure do not exceed the admissible loads. Results of the research can be used in designing coupled flat cars to provide their capacity at mixed transportation.

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A 1D Model for Predicting Heat and Moisture Transfer through a Hemp-Concrete Wall Using the Finite-Element Method

Materials ◽

10.3390/ma14226903 ◽

2021 ◽

Vol 14 (22) ◽

pp. 6903

Author(s):

Maroua Benkhaled ◽

Salah-Eddine Ouldboukhitine ◽

Amer Bakkour ◽

Sofiane Amziane

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Moisture Transfer ◽

Construction Material ◽

Climatic Conditions ◽

Vapor Permeability ◽

Transfer Model ◽

The Finite Element Method ◽

Concrete Wall ◽

Element Method

Plant-based concrete is a construction material which, in addition to having a very low environmental impact, exhibits excellent hygrothermal comfort properties. It is a material which is, as yet, relatively unknown to engineers in the field. Therefore, an important step is to implement reliable mass-transfer simulation methods. This will make the material easy to model, and facilitate project design to deliver suitable climatic conditions. In recent decades, numerous studies have been carried out to develop models of the coupled transfers of heat, air and moisture in porous building envelopes. Most previous models are based on Luikov’s theory, considering mass accumulation, air and total pressure gradient. This theory considers the porous medium to be homogeneous, and therefore allows for hygrothermal transfer equations on the basis of the fundamental principles of thermodynamics. This study presents a methodology for solving the classical 1D (one-dimensional) HAM (heat, air, and moisture) hygrothermal transfer model with an implementation in MATLAB. The resolution uses a discretization of the problem according to the finite-element method. The detailed solution has been tested on a plant-based concrete. The energy and mass balances are expressed using measurable transfer quantities (temperature, water content, vapor pressure, etc.) and coefficients expressly related to the macroscopic properties of the plant-based concrete (thermal conductivity, specific heat, water vapor permeability, etc.), determined experimentally. To ensure this approach is effective, the methodology is validated on a test case. The results show that the methodology is robust in handling a rationalization of the model whose parameters are not ranked and not studied by their degree of importance.

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The Roof Technology Research for LNG Cryogenic Storage Tank Based on ABAQUS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.668-669.294 ◽

2014 ◽

Vol 668-669 ◽

pp. 294-297

Author(s):

Jiang Hui Yang ◽

Gong Sheng Yang ◽

Zhong Zhi Ye

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Storage Tank ◽

Structural Strength ◽

Mode Analysis ◽

Instability Mode ◽

Technology Research ◽

The Finite Element Method ◽

Cryogenic Storage ◽

Roof Strength

Based on the structural strength and stability theory, the paper introduce the basic principle and key considerations about the roof structural analysis, especially it should pay more attention to the concrete segment pouring effects. Taking the Tianjin LNG cryogenic storage tank as an example, which is independently finished by CNOOC, The finite element method is used for the roof strength and instability mode analysis, and study the failure sequence of strength damage and instability about the roof shell structure.

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The Influence on Lining Moment of Tunnel under the Local Weakening of Structural Strength of Loess

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.3872 ◽

2011 ◽

Vol 250-253 ◽

pp. 3872-3875

Author(s):

Rong Jian Li ◽

Wen Zheng ◽

Juan Fang ◽

Gao Feng Che

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Structural Strength ◽

Numerical Results ◽

The Finite Element Method ◽

Loess Area ◽

Element Method

The influence of structural strength on the lining moment of tunnel should be properly evaluated in order to meet the engineering demand in loess area. It is essential to analyze and evaluate the lining moment of tunnel by means of the finite element method under the condition of the different local weakening of structural strength in loess. Firstly, some researches on the structural strength of loess tunnel are reviewed. Then, some different cases of the local weakening of structural strength in loess are analyzed in this paper. Numerical results not only indicate that the lining moment of tunnel tends to change obviously with the different local weakening of the structural strength, but also reveal that the weakening location of structural strength has important effect on the distribution and redistribution of the lining moment of tunnel.

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The Simulation and Analysis of the New Type Large Vacuum Container Flange Welding Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.472.671 ◽

2014 ◽

Vol 472 ◽

pp. 671-676

Author(s):

Bo Tao Liu ◽

Yan Qi ◽

Xiao Han ◽

Shi Zeng Lv ◽

Guo Feng Wang

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Structural Strength ◽

Hollow Structure ◽

Welding Process ◽

The Finite Element Method ◽

Material Consumption ◽

Stiffness Property ◽

New Type ◽

The Stability

Flange is the key part of the large vacuum container and its stiffness property affects the sealing effect and the stability of the container. Large flange welding process will have a greater impact on its structural strength. In view of the traditional way of forming large vacuum container flange has problems that processing and manufacturing are difficult, more material consumption, and poor stiffness, a new type of flange structure was support. The new design has hollow structure and the welding process of cover flange was simulated through the finite element method. After that, the stress and the deformation were analyzed and then the proper welding scheme was optimized.

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OPTIMASI STRUKTUR HELIDECK DENGAN VARIASI BEBAN HELIKOPTER

Construction and Material Journal ◽

10.32722/cmj.v2i3.3408 ◽

2020 ◽

Vol 2 (3) ◽

pp. 155-161

Author(s):

Anwar Anwar ◽

Reza Bachmid

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Yield Stress ◽

Structural Strength ◽

The Finite Element Method ◽

Maximum Weight ◽

Working Stress ◽

Calculation Results ◽

Helicopter Landing ◽

Structure Strength

ABSTRACTHelideck is a helicopter landing field located on ships and offshore buildings. The helideck structure must have the strength to withstand the loads of the helicopter landing. The purpose of this study is to determine the maximum strength of the helideck structure. Helideck structure strength calculations used SACS structural strength software by performing a running analysis adopting the finite element method. The maximum calculation results value that the helideck structure can hold is the type of helicopter with a maximum weight of 155 kN with a working stress of 37,80 N/mm2 and an interaction value of (IR) 1. The helideck structure will encounter a yield stress or fracture with an IR value > 1.Keywords : Structure Strength, Helideck, Helicopter LoadABSTRAKHelideck merupakan lapangan pendaratan helikopter yang terdapat pada kapal dan bangunan lepas pantai, struktur helideck harus memiliki kekuatan yang mampu menahan beban pendaratan helikopter. Tujuan penelitian ini adalah untuk menghitung kekuatan maksimum dari struktur helideck, perhitungan kekuatan struktur helideck menggunakan software kekuatan struktur SACS dengan melakukan running analisis yg mengadopsi metode elemen hingga.hasil penelitian menunjukkan nilai maksimum yang dapat ditahan struktur helideck adalah tipe helikopter dengan berat maksimum 155 kN dengan tegangan kerja maksimum sebesar 37,80 N/mm2 dan nilai interaksi rasio (IR) 1. Struktur helideck akan mengalami tegangan leleh atau patah dengan nilai IR > 1.Kata kunci : Kekuatan Strutur, Helideck, beban helikopter

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Strength analysis of the TWS 600 plunger pump body in Solid Works Simulation

Advanced Engineering Research ◽

10.23947/2687-1653-2021-21-1-71-81 ◽

2021 ◽

Vol 21 (1) ◽

pp. 71-81

Author(s):

E. V. Koleda ◽

S. O. Kireev ◽

M. V. Korchagina ◽

A. V. Efimov ◽

J. Sperling

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Computer Aided Design ◽

The Body ◽

Strength Calculation ◽

The Finite Element Method ◽

Plunger Pump ◽

Computer Aided ◽

Solid Works ◽

Aided Design

Introduction. The relevance of the presented paper is due to the widespread use of plunger pumps in industrial practice, in particular, in gas and oil production. The quality of working operations and the efficiency of further well operation depend largely on their reliability. The improvement of plunger pumps involves increasing their reliability, increasing their service life, efficiency, downsizing, reduction in weight, labor intensity of installation and repair work. The modernization of the mechanism includes its power study since the found forces are used for subsequent strengthcalculations. Before the appearance of programs for the numerical analysis of solid objects, the analytical solution to theproblem of strength calculation of the high-pressure pump drive frame was a very time-consuming and expensiveprocedure. The situation has changed with the development of computer technologies and the inclusion of the finite element method in the computer-aided design systems. The objective of this work is to perform a strength calculationon the TWS 600 plunger pump body made of 09G2S steel. Materials and Methods. A method for determining the reactions of the crank shaft supports of a high-pressure plungerpump and strength calculation of the drive part housing is developed. The direction and magnitude of the resultingforces and reactions of the supports are determined graphically according to the superposition principle of the forceaction on the supports. Strength calculations were performed using the finite element method in the computer-aided design system Solid Works Simulation. In this case, solid and finite-element models of the body with imposed boundary conditions were used, which were identified during the analysis of the design and the calculation of the forces arising under the pump operation.Results. The reactions in the crankshaft supports are described with account for the forces generated by the plungerdepending on its operating mode and the crank position. The forces acting on each of the plungers and the resultingreactions in each of the supports are determined. The diagrams of stresses and the safety factor are presented, whichprovide assessing the strength of the body and developing recommendations for creating a more rational design.Discussion and Conclusions. As a result of the calculations, we have identified areas of the structure with minimumsafety factors, and areas that are several times higher than the recommended values. This provides optimizing the designunder study through strengthening the first and reducing the thickness of the metal on the second. From the point ofview of weight and size characteristics and maintainability, the results of the strength calculation performed can be used to optimize the design of the pump body under typical operating conditions.

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Method for the Determining Metal Mechanical Characteristics Using FEM

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.316.917 ◽

2021 ◽

Vol 316 ◽

pp. 917-922

Author(s):

Irina Volokitina ◽

Evgeniy Panin ◽

Kanat Tolubaev

Keyword(s):

Mathematical Modeling ◽

Finite Element Method ◽

Finite Element ◽

Tensile Strength ◽

Software Package ◽

Mechanical Characteristics ◽

Real Data ◽

Micro Hardness ◽

The Finite Element Method ◽

Very High

In this paper the methods of mechanical testing of metal and the possibility of their implementation, using mathematical modeling by the finite element method in Deform software package, are considered. As the studied parameters, both the strength indicators (yield strength, tensile strength, Brinel micro-hardness), and the plasticity indicator (the number of kinks before the crack is formed), were studied. The values obtained in the simulation have a very high convergence with the real data.

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NUMERICAL ANALYSIS OF KINETIC ENERGY PROJECTILE SABOT STRUCTURE INFLUENCING THE ARMOUR PENETRATION DEPTH. PART II – ANALYSIS OF PROJECTILE DEVELOPING OPTIONS

PROBLEMY TECHNIKI UZBROJENIA ◽

10.5604/01.3001.0015.2498 ◽

2021 ◽

Vol 156 (1) ◽

pp. 7-28

Author(s):

Tomasz BŁASZCZAK ◽

Mariusz MAGIER

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Numerical Analysis ◽

Kinetic Energy ◽

Penetration Depth ◽

Numerical Calculations ◽

Dynamic Loads ◽

Simulation Environment ◽

The Finite Element Method ◽

Terminal Ballistics

Numerical calculations were used to investigate influence of sabot structures of kinetic energy projectiles into the armour penetration depth. Areas of sabot structure for possible optimization and the influence of various sabot materials on the projectile combat efficiency were indicated. The analysis was performed using the finite element method in the Solidworks Simulation environment. It allowed examination of dynamic loads the sabot is subjected to at the time of the shot. Impact of various sabot materials and projectile geometry modifications on the strength of penetrator - sabot connection was investigated. Distributions of dynamical loads for penetrator-sabot connections were simulated and visualised. Calculations on terminal ballistics were performed for some options of the structure. It allowed identification of development trends for this type of ammunition.

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Parametric Study on the Effects of Soil to Oscillation Velocity / Parametrická Studie Vlivu Typu Zeminy Na Amplitudu Rychlosti Kmitání

Transactions of the VŠB - Technical University of Ostrava Civil Engineering Series ◽

10.2478/v10160-012-0026-2 ◽

2012 ◽

Vol 12 (2) ◽

pp. 123-131 ◽

Cited By ~ 1

Author(s):

Tomáš Petřík ◽

Eva Hrubešová ◽

Martin Stolárik ◽

Miroslav Pinka

Keyword(s):

Mathematical Modeling ◽

Finite Element Method ◽

Finite Element ◽

Soil Properties ◽

Dynamic Load ◽

Parametric Study ◽

Civil Engineering ◽

Dynamic Loads ◽

Experimental Measurements ◽

Oscillation Velocity

Abstract The paper focuses on the possibility of evaluating the influence of character of the soil to oscillations velocity induced dynamic loads. Mathematical modeling is used to solve the parametric study. Models are created in software Plaxis 2d based on finite element method. Dynamic load is based on experimental measurements on the stand in the area of the Faculty of Civil Engineering, VSB-TUO. Soil properties are determined from the normative indicative characteristics.

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