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Development of velomobile
Adámek, Silvestr ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The bachelor thesis deal with one of a lesser-known means of transport as velomobile certainly is at the moment. This research aims to the development and overall complexity of these modern human-powered vehicles using aerodynamics to its advantage. Due to absence of internal combustion engine, velomobiles reduce negative environmental impacts but also dependence of fossil fuels. Different specifications of velomobiles such as wheels configuration, propulsion system and its usage are being analysed in this study as well as main construction elements or invariably innovated materials. For instance, carbon fibres are one of the modern materials contributing to the strength and lightness of velomobile. Modern approaches goes hand in hand with the development of these modern vehicles, aerodynamics optimalizations of the vehicle body, construction strength or questions regarding electric propulsion to be more specific. Although velomobiles represent an efficient way of transportation, initial costs, weight and size could be impediment to the wider public.
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Design of frame of recumbent bicycle
Gayer, Tomáš ; Maňas, Pavel (referee) ; Vrbka, Martin (advisor)
The aim of this diploma thesis is evolution of the new model of tricycle. This thesis describes process of engineering from design of several parts and whole frame in CAD system Autodesk Inventor, to creating complete drawing documentation. Next part of this thesis is focused on basic static-structural analysis using finite element method in software ANSYS Workbench and determining boundary conditions for this analysis. The final part is about visualization of the new tricycle.
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Stress, deformation and strength analysis of the frontal recumbend axle
Valenda, Jakub ; Gayer, Tomáš (referee) ; Vrbka, Jan (advisor)
The bachelor’s thesis is focused on evaluation of tenseness and safety of a recumbert bike's front axle using method of basic elasticity. Calculation is limited to three options that differ in manner of frame's load. Used model of the axle is beam with two straight and one curved part. A bend and twist are considered as dominant stress. In conclusion there is for each load status evaluated the progress of tension on a beam's length, safety in critical point and deformation in point of power effect on axle. In my bachelor thesis there was used Matlab software for analytic calculation. Ancillary drawings were created in AutoCAD and Autodesk Inventor.
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Design of recumbent bike
Sazima, Ondřej ; Lehocký, Peter (referee) ; Zvonek, Miroslav (advisor)
The subjekt of this thesis is design of recumbent bicycle. Recumbent bicycle is designed as tricycle with partially open fairing. Main aim was to design a functional and timeless design using modern technologies. Recumbent tricycle was designed with the fairing and tilting mechanism to easily corner, with innovative solution of turning which makes easier to mount and dismount recumbent tricycle. The work was solved by design, technical and ergonomic side also includes other aspects of the design.
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HPV
Šmak, Petr ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
Design of frame of a human powered vehicle (HPV) is the aim of this diploma thesis. Wide analysis precedes design process. The thesis describes historical developement of land transportation, especially history of cycling, bicycles and other human povered vehicles, which are not so extended. Preferences and deficiencies of transportation by these ecological vehicles are shown. The thesis includes summary of most widespread and best-known conceptions, including their advantages and disadvanteges. Conception of three-wheeled vehicle was selected. It has two steered front wheels and one powered rear wheel. The accent is putted on wide efficiency, ergonomics, simplicity of vehicle`s frame and possibility of using common cycling components. 3D model of frame and assembly of vehicle was created. This model was checked by FEM computation.
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The Recumbent bike as a phenomenon of cycling
Müller, Martin ; Šafránek, Jiří (advisor) ; Brtník, Tomáš (referee)
Title: The Recumbent bike as a phenomenon of cycling. Objectives: This bachelor's thesis mainly focuses on an exploration of the history of recumbent cycling as a phenomenon in the Czech Republic. Methods: Quantitative data acquisition. The Results: According to qualified estimation, there are about 500 - 600 people who actively ride the recumbent bike in the Czech Republic. During a meeting, 66 participants filled our questionnaire. This number of participants corresponded to 60% of all participants. I concluded that most of the recumbent bikers are men aged 51 to 55. They prefer short wheelbase construction with an upper type of steering handlebars, rear wheel drive, and higher seating. They have 3 to 5 years of riding experience. They are mostly lone riders and They ride their bike once a week. They are attending recumbent bike meetings periodically and are not active recumbent bike racers. Not a single respondent is experiencing any health issues related to recumbent cycling. A few of them are using the recumbent bike as a compensatory exercise. The respondents have no trouble riding in traffic. To them, the most noticeable advantage is the ability to sit comfortably in comparison to conventional bicycles. As disadvantages, They have mentioned experiencing more difficulties in ascenting,...
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Design of recumbent bike
Sazima, Ondřej ; Lehocký, Peter (referee) ; Zvonek, Miroslav (advisor)
The subjekt of this thesis is design of recumbent bicycle. Recumbent bicycle is designed as tricycle with partially open fairing. Main aim was to design a functional and timeless design using modern technologies. Recumbent tricycle was designed with the fairing and tilting mechanism to easily corner, with innovative solution of turning which makes easier to mount and dismount recumbent tricycle. The work was solved by design, technical and ergonomic side also includes other aspects of the design.
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Design of frame of recumbent bicycle
Gayer, Tomáš ; Maňas, Pavel (referee) ; Vrbka, Martin (advisor)
The aim of this diploma thesis is evolution of the new model of tricycle. This thesis describes process of engineering from design of several parts and whole frame in CAD system Autodesk Inventor, to creating complete drawing documentation. Next part of this thesis is focused on basic static-structural analysis using finite element method in software ANSYS Workbench and determining boundary conditions for this analysis. The final part is about visualization of the new tricycle.
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HPV
Šmak, Petr ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
Design of frame of a human powered vehicle (HPV) is the aim of this diploma thesis. Wide analysis precedes design process. The thesis describes historical developement of land transportation, especially history of cycling, bicycles and other human povered vehicles, which are not so extended. Preferences and deficiencies of transportation by these ecological vehicles are shown. The thesis includes summary of most widespread and best-known conceptions, including their advantages and disadvanteges. Conception of three-wheeled vehicle was selected. It has two steered front wheels and one powered rear wheel. The accent is putted on wide efficiency, ergonomics, simplicity of vehicle`s frame and possibility of using common cycling components. 3D model of frame and assembly of vehicle was created. This model was checked by FEM computation.
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Stress, deformation and strength analysis of the frontal recumbend axle
Valenda, Jakub ; Gayer, Tomáš (referee) ; Vrbka, Jan (advisor)
The bachelor’s thesis is focused on evaluation of tenseness and safety of a recumbert bike's front axle using method of basic elasticity. Calculation is limited to three options that differ in manner of frame's load. Used model of the axle is beam with two straight and one curved part. A bend and twist are considered as dominant stress. In conclusion there is for each load status evaluated the progress of tension on a beam's length, safety in critical point and deformation in point of power effect on axle. In my bachelor thesis there was used Matlab software for analytic calculation. Ancillary drawings were created in AutoCAD and Autodesk Inventor.
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