National Repository of Grey Literature 8 records found  Search took 0.00 seconds. 
Static analysis of a concrete outlet channel
Skalník, Stanislav ; Nováček, Jan (referee) ; Zich, Miloš (advisor)
The thesis deals with the static analysis associated with the outlet channel of the lock chamber. The basis for the work was the design of reinforcement using full-threaded prestressing bars and the drawing documentation of the existing condition. The aim of the work was to present the issues associated with the anchoring of the prestressing bars by cohesion in the existing concrete structure, in particular testing on test blocks in the laboratory to verify a suitable solution. Following the data obtained, to perform an analysis and comparison on models solved by nonlinear computation in ATENA Science software. Subsequently, the analysis of the model of the existing condition of the outlet channel section is also carried out by nonlinear calculation with the evaluation of its behaviour to extreme loads. This model is then supplemented with reinforcement using prestressing bars with application of the knowledge associated with the pullout test models. The model of the pre-stressed outlet channel section is thus a simulation of the design on the lock itself.
Control Design of the Rotation Inverted Pendulum
Cejpek, Zdeněk ; Němec, Zdeněk (referee) ; Matoušek, Radomil (advisor)
Aim of this thesis is building of a simulator model of a rotary (Furuta) pendulum and design of appropriate regulators. This paper describes assembly of a nonlinear simulator model, using Matlab–Simulink and its library Simscape–Simmechanics. Furthermore the paper discuss linear discrete model obtained from the system response, using least squares method. This linear model serves as aproximation of the system for designing of two linear discrete state space regulators with sumator. These regulators are supported by a simple swing–up regulator and logics managing cooperation.
Static analysis of the cross-section of the lock chamber
Skalník, Stanislav ; Koláček, Jan (referee) ; Zich, Miloš (advisor)
The bachelor‘s thesis deals with static solutions of the lock chamber. Background for this work were static calculations according to safety levels and drawing documentation of the actual structure. Goal is to evaluate the existing solution of the walls and the bottom of the chamber in selected sections based on the internal forces of the wall model created in the SCIA Engineer. Following with global analysis of a nonlinear model reinforced with the main load-bearing reinforcement according to the original design created in the Idea StatiCa Detail. The second part of this work was the design of an alternative solution of the chamber with a type of rib walls with dimensionability verification. Suggestion of the main wall reinforcement and reinforcement of the most stressed rib. Furthermore a comparison with the original solution from the point of view of deformation, material savings and subsequent assessment of the chamber leaching. Static calculations of both variants, drawings of the used reinforcement for the nonlinear model and drawings of an alternative solution containing the shape and schemes of the wall and rib reinforcement are included.
Static analysis of the cross-section of the lock chamber
Skalník, Stanislav ; Koláček, Jan (referee) ; Zich, Miloš (advisor)
The bachelor‘s thesis deals with static solutions of the lock chamber. Background for this work were static calculations according to safety levels and drawing documentation of the actual structure. Goal is to evaluate the existing solution of the walls and the bottom of the chamber in selected sections based on the internal forces of the wall model created in the SCIA Engineer. Following with global analysis of a nonlinear model reinforced with the main load-bearing reinforcement according to the original design created in the Idea StatiCa Detail. The second part of this work was the design of an alternative solution of the chamber with a type of rib walls with dimensionability verification. Suggestion of the main wall reinforcement and reinforcement of the most stressed rib. Furthermore a comparison with the original solution from the point of view of deformation, material savings and subsequent assessment of the chamber leaching. Static calculations of both variants, drawings of the used reinforcement for the nonlinear model and drawings of an alternative solution containing the shape and schemes of the wall and rib reinforcement are included.
Mathematical analysis and computer simulations of deformation of nonlinear elastic bodies in the small strain range
Kulvait, Vojtěch ; Málek, Josef (advisor)
Title: Mathematical analysis and computer simulations of deformation of nonlinear elastic bodies in the small strain range. Author: Vojtěch Kulvait Department: Mathematical Institute of Charles University Supervisor: prof. RNDr. Josef Málek, CSc., Dsc. Abstract: Implicit constitutive theory provides a suitable theoretical framework for elastic materials that exhibit a nonlinear relationship between strain and stress in the range of small strains. We study a class of power-law models, where the nonlinear dependence of strain on the deviatoric part of the stress tensor and its trace are mutually separated. We show that these power-law models are capable to describe the response of a wide variety of beta phase titanium alloys in the small strain range and that these models fit available experimental data exceedingly well. We also develop a mathematical theory regarding the well-posedness of boundary value problems for the considered class of power-law solids. In particular, we prove the existence of weak solutions for power law exponents in the range (1, ∞). Finally, we perform computer simulations for these problems in the anti-plane stress setting focusing on the V-notch type geometry. We study the dependence of solutions on the values of power law exponents and on the V-notch opening angle. We achieve...
Control Design of the Rotation Inverted Pendulum
Cejpek, Zdeněk ; Němec, Zdeněk (referee) ; Matoušek, Radomil (advisor)
Aim of this thesis is building of a simulator model of a rotary (Furuta) pendulum and design of appropriate regulators. This paper describes assembly of a nonlinear simulator model, using Matlab–Simulink and its library Simscape–Simmechanics. Furthermore the paper discuss linear discrete model obtained from the system response, using least squares method. This linear model serves as aproximation of the system for designing of two linear discrete state space regulators with sumator. These regulators are supported by a simple swing–up regulator and logics managing cooperation.
Mathematical analysis and computer simulations of deformation of nonlinear elastic bodies in the small strain range
Kulvait, Vojtěch ; Málek, Josef (advisor)
Title: Mathematical analysis and computer simulations of deformation of nonlinear elastic bodies in the small strain range. Author: Vojtěch Kulvait Department: Mathematical Institute of Charles University Supervisor: prof. RNDr. Josef Málek, CSc., Dsc. Abstract: Implicit constitutive theory provides a suitable theoretical framework for elastic materials that exhibit a nonlinear relationship between strain and stress in the range of small strains. We study a class of power-law models, where the nonlinear dependence of strain on the deviatoric part of the stress tensor and its trace are mutually separated. We show that these power-law models are capable to describe the response of a wide variety of beta phase titanium alloys in the small strain range and that these models fit available experimental data exceedingly well. We also develop a mathematical theory regarding the well-posedness of boundary value problems for the considered class of power-law solids. In particular, we prove the existence of weak solutions for power law exponents in the range (1, ∞). Finally, we perform computer simulations for these problems in the anti-plane stress setting focusing on the V-notch type geometry. We study the dependence of solutions on the values of power law exponents and on the V-notch opening angle. We achieve...
Mathematical analysis and computer simulations of deformation of nonlinear elastic bodies in the small strain range.
Kulvait, Vojtěch ; Málek, Josef (advisor) ; Kovtunenko, Victor A. (referee) ; Kružík, Martin (referee)
Title: Mathematical analysis and computer simulations of deformation of nonlinear elastic bodies in the small strain range. Author: Vojtěch Kulvait Department: Mathematical Institute of Charles University Supervisor: prof. RNDr. Josef Málek, CSc., Dsc. Abstract: Implicit constitutive theory provides a suitable theoretical framework for elastic materials that exhibit a nonlinear relationship between strain and stress in the range of small strains. We study a class of power-law models, where the nonlinear dependence of strain on the deviatoric part of the stress tensor and its trace are mutually separated. We show that these power-law models are capable to describe the response of a wide variety of beta phase titanium alloys in the small strain range and that these models fit available experimental data exceedingly well. We also develop a mathematical theory regarding the well-posedness of boundary value problems for the considered class of power-law solids. In particular, we prove the existence of weak solutions for power law exponents in the range (1, ∞). Finally, we perform computer simulations for these problems in the anti-plane stress setting focusing on the V-notch type geometry. We study the dependence of solutions on the values of power law exponents and on the V-notch opening angle. We achieve...

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