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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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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.
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Topological Optimization of Steering Holder
Ženčák, Jan ; Janoušek, Michal (referee) ; Ramík, Pavel (advisor)
This thesis deals with the design of steering holder for a race car in the category Formula Student using topology optimisation and analysis of this design. The objective of this thesis is gaining knowledge about topology optimisation and application of this knowledge to the design of a replacement of the steering gearbox and its holder.
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Using free programs for topology optimization on selected problems in solid mechanics
Flídr, Ondřej ; Halabuk, Dávid (referee) ; Vosynek, Petr (advisor)
This bachelor thesis examines open-source software for topology optimization, analyzes their possibilities on selected problems of solid mechanics and verifies the results by the finite element method. The theoretical part describes the principles and methods by which the tasks of topology optimization can be solved. This is followed by search for open-source software using these methods. The calculation process in selected software is described in detail in solving sample tasks in the penultimate part. In the last chapter, the best open-source software are compared with each other and also with commercially distributed Ansys Workbench 19.2. The output is an evaluation of the usability of individual open-source software in industry. This thesis can also serve as a manual for using selected programs for inexperienced users.
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Design of Formula Student Car Wheel Carriers
Chlud, Martin ; Janoušek, Michal (referee) ; Ramík, Pavel (advisor)
Master’s thesis focused on design and construction of front uprights for Formula Student racing car. Topology optimization and FEM analysis will be used to design the uprights with higher stiffness and minimal weight difference compared to the last model. In the FEM analysis loads will be applied from wheel side and from suspension side. Design of the upright then will be compared to the previous designs especially to safety factor, weight and cost.
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Rocker for Formula Student Vehicle
Šprta, Petr ; Prokop, Aleš (referee) ; Janoušek, Michal (advisor)
This thesis deals with a prototype of the rear suspension rockers of the racing monopost Dragon 10th generation, which is being developed at the Brno University of Technology within the international educational project Formula Student. Based on the research, the technology method of casting has been chosen for this purpose. The input for the prototype of the rocker arms is based on the impacting forces and suspension points given by kinematics of the vehicle. Based on these facts, topology optimization of the shapes has been conducted and the components have been modelled accordingly. Followingly, optimization focused on minimizing weight, deformation and stress were conducted using the reverse loading of modelled components. The last part of this thesis is concerned in the comparison of rear rockers of the last year‘s monopost Dragon 9. Taking into consideration the change of the concept, the mechanical properties of rockers are slightly better.
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Optimization of an aircraft wing rib
Kopřiva, Lubomír ; Suchánek, Miroslav (referee) ; Petruška, Jindřich (advisor)
Topology optimization is a method providing new direction in designing of a technical objects. The aim of topology optimization is to find optimal distribution of material in design space. This diploma thesis is focused on optimization of aircraft wing rib num.6 of the airplane EV-55 using a software HW/Optistruct 7.0 implemented in a software package HyperWorks 7.0. The optimization of the rib was calculated under four different load cases. Resulting shapes of the rib were then tested by strenght calculations in software ANSYS 10.0. Finally, the obtained data of weights of optimized ribs were compared with the weight of the original rib.
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Vehicle Front Wheel Carrier Behaviour Analysis
Baxant, Roman ; Janoušek, Michal (referee) ; Ramík, Pavel (advisor)
Master’s thesis is focused on a design of front uprights for Dragon 8 racing car of TU Brno Racing Formula Student team. This thesis follows up the bachelor’s thesis called “Race Car Front Wheel Carrier Design”. Discussion about team’s recent upright and component designs is followed by a model creation with use of topology optimization. Final geometry is simulated in FEA software. Design of the upright is then compared to the previous designs and also to its substitute produced with milling machining process.
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Casted Formula Student Upright
Doležal, Tomáš ; Prokop, Aleš (referee) ; Janoušek, Michal (advisor)
Bachelor thesis deals with a design of casted upright for Formula Student vehicle Dragon X. Casting method used for the purpose of this thesis was selected by review of relevant scientific literature. The upright was then structurally designed and strength calculations were made. Main criterion of the design is minimum compliance with meeting the required weight. Final design is compared with the design of the previous generation of vehicle.
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Analysis of the turbine housing design in terms of heat leakage
Diakov, Jakub ; Lošák, Petr (referee) ; Vlach, Radek (advisor)
This diploma thesis deals with the judgment of usability of the topology optimisation of the Ansys Workbench program combined with thermo-mechanical fatigue and the non-linear material model of a turbine housing. The first part of the thesis includes research which serves for the purpose of understanding and for theoretical support of the practical part. The research part of the thesis at first gives reasons for the choice of the main aim of the thesis. The main aim of the thesis is the decrease of heat leak from the exhaust fumes due to the reason of the sooner combustion products processing and lower emissions production. The second chapter of the research analyses the construction and function of a turbocharger from the perspective of the geometry of the components and also from the perspective of the production and use of the components. The following chapter deals with the analysis of the energetic and thermal balance of the turbocharger. This chapter mentions the fundamental simplifications of the calculation problem and these simplifications are applied in the practical example. Next, the chapter analyses the thermo-mechanical fatigue, classification of the areas of fatigue and it also analyses the approaches used for the life expectancy predictions. The chapter of the research part deals with the selected areas of calculation and their theoretical basis. The last chapter analyses the fluid mechanics and the selected methods of the topology optimisation which are available in the selected calculation program. After the research part of the thesis, there follows the practical part which discusses a multiphysical example of the turbine housing optimisation from the perspective of heat leak and of the turbine housing being exposed to the thermo-mechanical fatigue. The practical part which is composed of several steps is based on the CFD analysis and this analysis is used for the purpose of gaining thermal conditions in order to calculate the transient thermal analysis. Out of the outcomes of the coupled transient thermal analysis, there is used the spatial temperature field which as a result of the expansivity of the material causes non-homogenous stress on the turbine housing. The practical part has an individual chapter dedicated to the usability of the topological optimisation in different types of tasks. One of the parts of this chapter includes is a suggestion of the methodology for determination of voltage limitation for the selected type of topological optimisation. The penultimate chapter in the practical part is dedicated to the topological optimisation of the turbine housing on the basis of the preceding voltage analysis and determined limitation. The last chapter includes performed validation of the optimised shape of the housing after the geometry is adjusted. The validation is performed from the perspective of steady state temperature of the output combustion products, of speed of heating of the optimised geometry and from the perspective of the comparison of the life expectancy determined in the thermo-mechanical fatigue. At the end of thesis, there are included conclusions discussed and suggested, scope for improvement and possibilities for continuation of further research.
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