|
|
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.
|
|
|
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.
|
|
|
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.
|
|
|
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.
|
|
|
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.
|
|
|
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.
|
|
|
Design and optimization of a frame for a machine tool
Weigl, František ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This diploma thesis deals with the optimization of the machine tool bed. In the first part of the thesis, individual machine tools and their distribution are briefly described. The following is a description of the influences that affect the static and dynamic properties of the bed, a brief overview of the materials used in the production of machine tools and a short overview of optimization methods. The second part of the work focuses on the creation of a model of the bed, which is used for mathematical optimization using FEM in the ANSYS Workbench. This serves to find the optimal input parameters of the bed, which will improve the static and dynamic properties of the bed. The optimization continues with changing the topology of the bed and using alternative materials. The result of this work is four optimized models, which are compared with the original configuration.
|
|
|
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.
|
|
|
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.
|
|
|
Shape Optimalisation of Aircraft Engine Crankshaft
Vopařil, Jan ; Drápal, Lubomír (referee) ; Novotný, Pavel (advisor)
This thesis describes the variety and the width of issues connected with crankshafts of combustion engines. It distinguishes different factors, which influence the shape and size of these crankshafts and the selected findings are then transferred into the design of crankshaft for the particular engine. The thesis also presents coherent description of application of topology optimization to the particular crankshaft and also different, more complex design procedures leading to the optimal shape of crankshaft are afterwards suggested. Quality of such a design is then verified by comparative analysis of fatigue of the crankshaft.
|
guest ::
