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Your search keyword '"Juračka, David"' showing total 2 results
Start Over Author "Juračka, David" Topic computer simulation
2 results on '"Juračka, David"'

1. Numerical simulation of the behavior of ball absorber in the spherical dish.

Author

Kawulok, Marek, Freiherrová, Nela, Juračka, David, and Pospíšil, Stanislav

Subjects
COMPUTER simulation, NONLINEAR differential equations, NONLINEAR equations, SIMULATION methods & models
Abstract

This paper is aimed at performing numerical simulations of the behavior of a planar model system consisting of a spherical absorber located in a supporting convex spherical cap. The derived system of nonlinear differential equations is subjected to a numerical solution. First, the time response of the system to harmonic excitation is analyzed. For this excitation, the frequency of the excitation was gradually changed, thus, resonance curves were created. This paper also examines the effect of initial conditions. For this purpose, numerical simulations of the system without an external excitation source have been performed. The results are phase portraits for selected pairs of initial conditions. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Hyperbolic Paraboloid Tensile Structure—Numerical CFD Simulation of Wind Flow in RWIND Software.

Author

Kawulok, Marek, Freiherrová, Nela, Horňáková, Marie, Juračka, David, and Krejsa, Martin

Subjects
FLOW simulations, PARABOLOID, WIND pressure, WIND tunnels, COMPUTER simulation
Abstract

Tensile membrane structures combine a prestressed roofing envelope material and supporting elements. To design these structures, there is a set of recommendations in the European Design Guide for Tensile Surface Structures and some other national standards. However, currently, there is no official standard related to the design process of tensile structures in the European Union. The structure studied in this project is considered as permanent roofing of an external testing device in the shape of a simple hyperbolic paraboloid without enclosing walls. Snow and wind loads were analyzed as the most critical types of loading in the location. Determining the value of the snow load is relatively simple according to the European standard. However, in the case of the wind load, this shape is not considered in the European standard and needs to be solved experimentally or by numerical simulation in a wind tunnel. The present contribution focuses on numerical analysis of the wind flow in RFEM software and simulation of the wind tunnel in RWIND software. [ABSTRACT FROM AUTHOR]

Published
2023
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