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Crank Train of a V6 Compression-ignition Engine
Homola, Petr ; Píštěk, Václav (referee) ; Drápal, Lubomír (advisor)
This master thesis, concentrated on crank train mechanism of diesel V6 engines with special focus on design and construction of crankshaft, is divided in two main phases. First phase is concept, which contains brief introduction of diesel V-engines construction, parameters of chosen engine unit, especially crank train mechanism, design of crankshaft and 1D analysis of torsional vibrations. Second phase is layout, this phase deals with MBS 3D analysis with flexible FEM models of crankshaft and engine block. These outputs are used for fatigue analysis of crankshaft.
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Structural Analysis of an Engine Block Design
Chevtaikin, Sergei ; Dlugoš, Jozef (referee) ; Drápal, Lubomír (advisor)
This master thesis focuses on structural analysis of combustion engine block. The main goal of this work was the design and compare individual solutions of long and short engine’s blocks. First part of work shows existing engine block designs and solutions. Based on the research part, the CAD design of the engine blocks and their discretization was performed by pre-processor programs. Structural analysis and their final comparison were provided by FEM and MBS programs.
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Dynamics of Turbocharger Rotor using Slide Bearings based on MBS
Hromádka, Adam ; Knotek, Jiří (referee) ; Novotný, Pavel (advisor)
The first part of the thesis describes construction of turbochargers. The next chapter summarizes currently used methods to solve dynamics of vehicle turbocharger´s rotor. Build-up of the model of a rotor and substitution of a joint with a bearing is appended with advantages and disadvantages. Practical part of the thesis focusses at analyse of a specific rotor of turbocharger with use of MBS. Output of the analyse are rotor´s vibrations. Last chapter complains methods to improve the model.
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Computational Modeling of Gear Mesh Engagement Dynamics by MBS Approach
Pykal, Vojtěch ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This master’s thesis is focused on the compilation of a computational modelling of gear mesh engagement dynamics of a spur gear by MBS approach. The user input is the specific geometry of gears, the operating speed, and the load torque. The output are the forces in the gear engagement and the reaction of the forces in the wheel bearings depending on the change in the stiffness of the gear due to the changing number of teeth in the engagement and the change in the axial distance. This model is characterized by a fast and relatively accurate calculation in the time domain. This means that it can react to changes in parameters during simulation such as axial distance, speed, and torque.
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The use of air springs for race car
Blažek, Jakub ; Zháňal, Lubor (referee) ; Porteš, Petr (advisor)
This diploma thesis studies the use of air springs for race car, precisely Formula Student race car. Research part of the thesis deals with choosing suitable air spring for given application. In practical part, there is computation of parameters for appropriate setting of air spring, so it will comply with the rules of Formula Student. There is also simulation of air spring functionality in real use.
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Digital twin
Kopeček, Pavel ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with the issue related to digital twin technology, which is developing during the current 4th industrial revolution primarily based on digitization across industries and in the near future, if properly applied, can be one of the core elements of most industrial processes. A digital twin represents a virtual representation of a physical object (machines, functional components, for example, within cars or even a part of the human body), with which it transmits information to each other in the form of data important for the target functions of the digital twin through the created communication channel. With the use of the obtained data, the control algorithm of this technology and through simulation models contained in the virtual space of the digital twin, this technology enables real-time work, the purpose of which is to perform an analysis of the operational state for the purpose of its evaluation, correction or, using the so-called "what-if" analyses, even its prediction, with the aim of achieving the most efficient use of real objects during their entire life cycle (production process of the object, operation and maintenance of the object, disposal of the object). The main outputs of this work are, from a research point of view, the performance of a critical evaluation of the current state of the application of digital twins within the industrial world and the creation of a digital twin creation algorithm, from a practical point of view, the creation of selected input 3D analyzes (simulation models) and the creation of a reduced ROM model for the purpose of creating basic building blocks for a digital twin of two-stage train transmission. For the practical part the Ansys Workbench system package and a relatively new system for calculating dynamic tasks called Ansys Motion were used.
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Computational Modeling of Dynamic Behaviour of Tractor
Hejčl, Pavel ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This work deals with the assessment of the effects of a rear-mounted mower on tractor dynamics. The first part summarizes knowledge of the used tractor suspension variants and their various modifications. Furthermore, the current possibilities for simulating the dynamics of tractors and the construction of the rear three-point hitch are described. The main part of the work is devoted to the assembly of the multibody model of the tractor with the rear-mounted mower. The correctness of the assembly of the virtual tractor prototype is verified by comparison with the technical experiment on the real tractor. The validated model is further used to analyse various well-defined steady-state and transient driving conditions typical of this set.
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