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Optimization of Light Jet Aircraft Air-brake Bracket
Kopecký, Marek ; Maňas, Pavel (referee) ; Koutný, Daniel (advisor)
The master thesis deals with a design of an air brake bracket for a light jet aircraft. The shape of the bracket was topologically optimized and manufactured using Selective Laser Melting technology using the AlSi10Mg material, resulting in a 37% reduction in weight. The component was verified using FEA. The real prototype was destructively tested to determine its behaviour and then was compared with the FEA simulation. The testing also confirmed that the bracket complies with the given load conditions and has almost five times greater load capacity compared to the operating load. The new design of the lightweight bracket will increase the range of the aircraft and reduce the carbon footprint.
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Topology optimization of crane hook
Kabelka, Jaroslav ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This final bachelor's thesis discusses the importance of topological optimization in solutions with regard to crane hooks. The thesis deals covers the theoretical part and the computational practical part of a specific crane hook. In the theoretical part, in addition to optimization methods, models, boundary conditions and the softwares, various types of hooks, their construction and properties are examined. In the computational part, the thesis then deals with a specific case of topological optimization of a crane hook, followed by validation and comparison of the obtained results.
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Design of shaped springs for mechanical resonators
Kleisl, Rudolf ; Hadraba, Petr (referee) ; Hadaš, Zdeněk (advisor)
This bachelor's thesis is focused on the analysis of the geometry of the resonator. At the beginning, we will state where we draw our initial inspiration from, and where the designed resonator could find practical use. Later on, topological optimization methods are indroduced along with other optimization methods that will be used in our geometry design. In the practical part, a sensitivity analysis of selected resonator parameters will be performed. We will use the interpreted results in the subsequent optimization of the resonator according to the required limiting conditions.
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Topological optimisation of the turbocharger electric actuator bracket
Směšný, Jan ; Kudláček, Petr (referee) ; Novotný, Pavel (advisor)
Topology optimization utilizes mathematical methods to develop the most efficient components in terms of mechanical properties and weight. Nowadays, it is a commonly used tool for designing components not only in the automotive, aerospace, and space industries. This work deals with the topological optimization of a metal bracket used to attach an electric actuator to a turbocharger. The turbocharger assembly is subjected to external influences, the most significant of which are vibrations from the engine. The program Ansys Workbench was used for modal and topology optimization calculations. The goal of the optimization was to minimize weight and maximize the natural frequency. The optimization takes into account a simple manufacturing method using conventional techniques (shearing & bending), which will remain the same for the optimized component. Additional care is taken to ensure, that the natural frequency of the bracket-actuator system is above the excitation frequency from the engine. The final optimization revealed that by appropriately removing material, the component's weight can be reduced by 22% without significantly degrading its dynamic properties.
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Optimizing a highly loaded components for motorsport
Šišpera, Petr ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with optimizing the rear suspension of the fifth generation Honda Civic for motorsport application. The goal is to reduce weight while increasing stiffness and precision in wheel control. The work is based on the properties of serial components, which are analyzed using FEM analysis in the Ansys program. Load conditions are calculated from vehicle dynamics and the loading of individual arms from the suspension kinematics. Suspension components are first modeled and analyzed and this data provides input information for optimization. Individual components are initially topologically optimized, based on which models are created for deformation stress analysis. The properties of the serial parts are ultimately compared to optimized ones under the most critical loading conditions and the result of the work is an optimized suspension system with lower weight and higher stiffness.
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Topology optimization of frame
Kartaš, David ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This bachelor thesis deals with the problem of topological optimization of machine components, specifically frame optimization. The first part describes the different methods and techniques of topological optimization. The second part contains the actual solution of topological optimization on a selected frame. In conclusion, the results of this work are summarized and evaluated, and finally compared with the baseline frame.
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Using optimization methods to design machine parts
Kubrický, Daniel ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This bachelor thesis describes using structural optimization methods to design machine parts. In the first part of the thesis, a description of the current state of knowledge of the optimization process was made together with its theoretical background. In the second part of the thesis, a static analysis and topology optimization or Generative design was developed using the example of a bell crank in six commercial software. In the third part, the resulting models of each software were compared with each other, and the results were compared using the von Mises maximum stress criterion and the overall model deformation. Finally, this work was concluded with an evaluation of the use of the structural optimization software.
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Topology optimization of a quadcopter arm using 3D print
Simon, Jakub ; Červinek, Ondřej (referee) ; Vaverka, Ondřej (advisor)
This bachelor thesis deals with the comparison of manufacturing constraints applied during topology optimization of a demonstration component, which was a quadcopter arm. Four designed arms were optimized, each with different manufacturing constraints: Extrusion, Single draw, Split draw, Overhang and one arm only with symmetry plane, without any other manufacturing constraint. For all designs, it was important to maintain a continuous geometry during optimization and that final weight approximately equals to the weight of the original arm. All five arms were then subjected to static structural analysis with the finite element method. After that, arms were printed using Fused deposition modelling (FDM) from ABS material and then tested by static force. The photogrammetry method was used to evaluate deformation. Results of the experiment were recalculated to relative stiffness, where small differences between weights were considered. Relative stiffnesses of designed arms were then compared, showing that 4 out of 5 topology optimized arms have higher stiffness than the original shape. The toughest design is without manufacturing constraints which at the same weight has 12.5 times higher relative stiffness than the original arm.
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Spatial materials for additive manufacturing in civil engineering
Říha, Tomáš ; Apeltauer, Tomáš (referee) ; Podroužek, Jan (advisor)
The bachelor thesis deals with additive manufacturing in the construction industry and with materials used in this field. The first part of the thesis defines the 3D printing, briefly describes the history of this progressive technology and gives an overview of the used methods and technologies. The printing methods are divided according to the physical state of the basic material used for printing. The next part of the thesis presents the possible use of additive manufacturing in the construction industry and an overview of realized projects. Finally, at the end of the theoretical part are introduced materials applicable to additive manufacturing in the construction industry and is defined the concept of spatial materials. Spatial materials are a relatively new term, which is not yet in the literature sufficiently defined. These materials can be used for an application in a space where the structure and the position of their particles can be optimized. They can be applied for the creation of 2D filling structures, which are more useful for geometrically simple and simply loaded constructions. It is preferable to use spatial materials to create 3D structures that are designed to fill numerically optimized structures. These structures are based on the principle of double curvature and on a triply-periodic minimum surface (TPMS). In the practical part of the thesis was created the design of building block filled with 3D gyroid structure, designed for prefabrication by using additive manufacturing in the factory or at the site of construction. This proposal reflects the increasing demand for easy individualization of constructions and building elements. Especially, the demand for the creation of structures and shapes which are topologically optimized with a customized appearance and sufficient strength, all at the customer's request.
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Topological optimization of a crane jib
Machara, Marcel ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This bachelor's thesis deals with the issue of topology optimization in the design of structures and machine parts. The first part of the thesis consists of a theoretical summary of the current state of knowledge of crane jibs and their basic categorization. The second part consists of theoretical knowledge about optimization problems and the method of topology optimization. In the third part, an example of the implementation of topology optimization on a cantilever crane is processed using the Ansys Workbench software. The parameters of optimized jib designs are compared with the parameters of their basic models. At the end of this chapter, an evaluation of the results of topology optimization is performed.
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