scholarly journals Modeling of foundation slabs of buildings on complex foundations

2021 ◽  
Vol 263 ◽  
pp. 03012
Author(s):  
Sergey Erokhin ◽  
Sergey Shashkin
Keyword(s):  
Numerical Model ◽  
Software Package ◽  
Wind Loads ◽  
Slab Model ◽  
Foundation Slab

The paper considers the problem of calculating the strength of foundation slabs under seismic and wind loads. As an example, a numerical model of a hotel building to be built on bulk islands is presented. The calculation of the foundation slab model is performed using the STARK ES software package. The results of the calculation are analyzed and recommendations for strengthening the foundation are given.

Evaluation of Wind Loads on FPSO Topsides Using a Numerical Wind Tunnel

2016 ◽  
Author(s):  
Daniel Barcarolo ◽  
Yann Andrillon ◽  
Erwan Jacquin ◽  
Alain Ledoux
Keyword(s):  
Boundary Layer ◽  
Numerical Model ◽  
Wind Tunnel ◽  
Atmospheric Boundary Layer ◽  
Scale Effects ◽  
Geometric Model ◽  
Wind Tunnel Test ◽  
Offshore Structures ◽  
Wind Loads ◽  
The Impact

The accurate evaluation of wind loads applied on floating offshore structures is extremely important as they are in specific conditions one of the dimensioning criteria for the mooring design. Nowadays these loads are mainly assessed through wind tunnel tests performed at model scale. Estimating realistic wind loads however, remains a big challenge. The complexity and associated simplification level of FPSO topside structures, the scale effects and the establishment of the atmospheric boundary layer imply that many simplifications are to be made. Typically, the FPSO topside is greatly simplified and equivalent blocs of wired frame are used. Today with the evolution of CFD software, and the increase of the meshing capacity, new scopes open to CFD. Aerodynamic simulations on complex FPSO structures are therefore now possible, but need specific developments and validations that are presented in this paper. The main objective of the work presented is to investigate the ability of CFD to evaluate wind loads on complex FPSOs topsides and to provide information on the impact of model simplifications made in wind tunnels. In a first stage, the numerical model was intensively validated by comparing its results to a wind tunnel test case. The numerical model was developed in order to ensure the quality of the results and enable a relevant comparison that was obtained with grids density up to 30 million cells. For this purpose, the geometric model used corresponds to the one used in wind tunnel. The same Atmospheric Boundary Layer was simulated and a thorough effort was performed to ensure the mesh convergence. In a second stage, more physical aspects of the wind tunnel methodology were investigated. Typically the accuracy of the blockage effect correction was evaluated by performing computations with and without blockage, and results were compared with classical corrections applied in wind tunnel. The impacts of the Atmospheric Boundary Layer on wind loads have also been investigated. Finally, the wind load contribution of each component of the FPSO was evaluated.

Numerical Prediction of Settlement Adjacent to Deep Excavation of Metro Station in Ju-Zi-Zhou Island, Changsha

2012 ◽  
Vol 204-208 ◽  
pp. 1484-1487
Author(s):  
Xing Yu Pan ◽  
Hong Yuan Fu
Keyword(s):  
Numerical Model ◽  
Software Package ◽  
Numerical Prediction ◽  
Deep Excavation ◽  
Site Condition ◽  
Metro Station ◽  
Key Points ◽  
Coulomb Model

It is of great significant to predict the influence of deep excavation in Ju-Zi-Zhou island, so that damage to adjacent ancient tree, and Xiang-jiang Bridge could be prevented. Based on analysis of site condition, geological profile, and strut design, the numerical model was generated in commercial available software package Flac3D, in which Mohr-Coulomb model was introduced. Then, the settlements at several key points on the ground were evaluated in each step of excavation. The calibrated results shows that, the calculated settlement agrees well with the measured. So it can be applied to predict completed state and provide a guidance for next construction.

scholarly journals The numerical parametric study of the stress-strain state of I-beams having versatile corrugated webs

Vestnik MGSU ◽  
2021 ◽  
pp. 676-687
Author(s):  
Sergey G. Saiyan ◽  
Alexander G. Paushkin
Keyword(s):  
Numerical Model ◽  
Inclination Angle ◽  
Parametric Study ◽  
Software Package ◽  
Strain State ◽  
Stress Strain ◽  
Equivalent Stresses ◽  
Stress Strain State ◽  
Design Solutions ◽  
Numerical Parametric Study

Introduction. The numerical parametric study of the stress-strain state of I-beams, having versatile corrugated walls, was carried out in the ANSYS Mechanical APDL software package. Numerical results are obtained for displacements, equivalent stresses and stability coefficients depending on the change in the inclination angle of web corrugations for trapezoidal, wavy and triangular profiles. The obtained results can help to design and substantiate the design solutions applicable to bending elements. Materials and methods. The parametric study involved a series of numerical experiments conducted using the finite element method in the ANSYS Mechanical APDL software package. APDL parametric language was used to develop the software that was built into the software package. It allowed to perform a parametric reconstruction of the numerical model depending on varied parameters of the corrugated wall, and the reconstruction was followed by the numerical solution and post-processing of the calculation results. The calculations were made with the help of the model whose overall dimensions and material were identical to those of a standard I-beam having a solid wall exposed to a uniformly distributed transverse load. Results. The parametric study enabled the co-authors to identify the main features of the stress-strain state of the beams that had different types of corrugated walls. A parametric numerical model was compiled to determine maximum displacements, equivalent stresses and stability coefficients for various types of corrugated walls and various parameters of the corrugation angle. Isofields of equivalent stresses and buckling modes are provided for characteristic parameters and types of corrugations. The reliability of the obtained results was confirmed by the verification of the numerical model using the method of the strength of materials and corrugation inclination angle α = 0, which was the initial point of simulation for all types of corrugations. Conclusions. The results, obtained in the course of parametric studies, have identified the main features of the stress-strain state of beams having corrugated walls; they allow to substantiate their effectiveness as design solutions applied to bending elements.

scholarly journals Numerical analysis of collision of the multimaterial bird model with helicopter windshield

2017 ◽  
Vol 42 (1) ◽  
pp. 5-24 ◽  
Author(s):  
Janusz Ćwiklak
Keyword(s):  
Numerical Analysis ◽  
Numerical Model ◽  
Software Package ◽  
Simulation Research ◽  
Bird Impact ◽  
Research Findings ◽  
Head Neck

AbstractThe aim of this article is to present findings of simulation research of a stork impact with a helicopter windshield. Besides we developed a numerical model of the stork, based on biometrical data, taking into account various properties of its head, neck, torso and wings. It appears that the research findings which take into consideration the bird’s shape differ from those using a simplified bird model in the shape of a cylinder or a sphere. In order to conduct an analysis of a bird impact onto an aircraft windshield, we used the LS_DYNA software package. In the classic variant with the 3.6 kg bird model, cylinder-shaped with spherical endings, the windshield became damaged at the velocity of 200 km/h for a standard windshield (3.81 mm). For the same velocity, we conducted simulation which used the multimaterial model. It appeared that the windshield did not become damaged. Therefore, the shape of the dummy bird also affects the velocity at which the damage occurs. Too wide simplification of the dummy bird shape may lead to lowered values of the velocity.

Global Modeling of Directional Solidification of Aluminum Alloys Using the Software Package CrysVUn

2006 ◽  
Vol 508 ◽  
pp. 437-442 ◽  
Author(s):  
Johannes Dagner ◽  
A. Weiß ◽  
Marc Hainke ◽  
Gerhard Zimmermann ◽  
Georg Müller
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Natural Convection ◽  
Numerical Model ◽  
Directional Solidification ◽  
Software Package ◽  
Numerical Study ◽  
Rotating Magnetic Field ◽  
Convective Conditions ◽  
Global Modeling

A global numerical model of a Bridgman furnace is developed and validated. The model includes heat transfer due to radiation and conduction in a stationary setup. The rotating magnetic field (RMF) device mounted on the facility is implemented into the model also. A numerical study on the flow field caused by the axial non-uniform RMF and natural convection is performed, helping to get a better understanding of the convective conditions during the directional solidification experiments.

METHOD OF DETERMINING WIND LOADS AND IMPACTS USING THE SOFTWARE

2020 ◽  
Vol 92 (6) ◽  
pp. 43-50
Author(s):  
V.I. RIMSHIN ◽  
◽  
P.S. TRUNTOV ◽  
E.S. KETSKO ◽  
I.S. KUZINA ◽  
...  
Keyword(s):  
Software Package ◽  
Construction Project ◽  
Lateral Force ◽  
Velocity Fields ◽  
Technical Support ◽  
Wind Loads ◽  
Average Pressure ◽  
Aerodynamic Coefficients ◽  
Medium Pressure ◽  
Pressure Propagation

The current study considers a multifunctional high security residential complex. The study was conducted as part of the scientific and technical support for the design of the construction project. The compliance of design and survey documentation with the established requirements is usually a result of scientific and technical support of design. The methodology of determining wind loans and impacts is implemented with the help of a software package named SOFiSTiK. This software is capable of performing computations of stationary and non-stationary wind loans. Aerodynamic coefficients of drag and lateral force, as well as average pressure values were found as a result of applying the methodology in question. Also, patterns of medium pressure propagation on the surface of facade systems and patterns of medium-velocity fields of the complex were determined.

scholarly journals Numerical analysis of wagon leaf spring using Ansys 14.5

2021 ◽  
Vol 27 (4) ◽  
pp. 119-123
Author(s):  
Mladen Krstić ◽  
Branislav Milenković ◽  
Đorđe Jovanović
Keyword(s):  
Numerical Analysis ◽  
Numerical Model ◽  
Static Analysis ◽  
Software Package ◽  
Suspension System ◽  
Leaf Spring ◽  
Cad Model ◽  
Commercial Vehicles ◽  
Ansys Software ◽  
Leaf Springs

Leaf springs are widely used for the suspension system in trains and commercial vehicles to absorb vibrations and shocks. This paper deals with the methodology of analysis of the leaf springs of the freight railway wagons by using software package Ansys 14.5. The methodology is applied in a concrete example of leaf spring for axle load of 225 kN. The procedure of forming the CAD model of the leaf spring using AutoCad and Autodesk Inventor is exposed, as well as the development of numerical model in Ansys software package. The results of the static analysis of given leaf spring are presented and commented.

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