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Design of strain gauge devices for safety belts load measuring
Lontras, Martin ; Jebáček, Ivo (referee) ; Mališ, Michal (advisor)
The aim of this thesis is to design, produce and experimentally verified measuring device for measuring force in seatbelt, by using strain gages. First are discussed possibilities of measuring force by using device placed in between two parts of seat belt or in anchor point. These suggestions were not accepted for various reasons. Therefore is further described girder, which belt slightly deflected so that part of the load is transferred to the strain gauge measuring element. As default concept is choosen aluminum U-profile, in which is placed measuring mechanism. There are performed calculations of basic geometry and stress control. Then is described manufacturing and calibration on universal testing machine. In conclusion is realized measuring of the force in seat belt, which is loaded by shock force, occasioned by dropping weights from a certain height, which simulates the behavior of the belt and gauge during a crash test.
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The concept for passive cooling of the VVER-1000 reactor
Lamoš, Pavel ; Suk, Ladislav (referee) ; Martinec, Jiří (advisor)
This thesis is focused on the design of passive cooling system for a nuclear reactor VVER- 1000.This type of reactor is located in the Czech Republic in the location of Nuclear power plant Temelín. The thesis states an overview of the different cooling systems of nuclear power plants. The thesis is focused on passive safety system especially on passive cooling system, so there was done an overview of currently used passive safety system. In the work is discussed nuclear safety and the maximum projected accident of VVER-1000, which is called LOCA accident. In the design part of the thesis was done thermal calculation of heat exchangers. Exchangers are designed as condensers with a natural flow, where cooling of system is provided by outside airflow in case an accident. The results are evaluated at the end of the thesis.
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Comprehensive System for Road Accident Analysis - Collision Between Vehicle and Motorcycle
Slepánek, Petr ; Kolíbal, Zdeněk (referee) ; Drahotský, Ivo (referee) ; Kropáč, František (referee) ; Bradáč, Albert (advisor)
The thesis describes the problems of a complex system for analysis of road accidents, specifically the methodology for solving the collision between vehicle and motorcycle. There are statistics described motorcycle accidents, motorcycle safety features, the basic types of collision positions between vehicles and motorcycles, design methodology for solving with traffic accidents between vehicles and motorcycles. The work is performed a set of different measurements used to supplement and refine the input data for the analysis of road accidents involving motorcycles. The work contains data obtained from measurements.
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The Influence of Modern Passive Safety Features in the Protection of a Vehicle's Occupants
Vostrejž, Jan ; Tylšar, Vladimír (referee) ; Semela, Marek (advisor)
Thesis in the field of passive safety problems, traffic accidents and health outcomes of participants in road traffic accidents is aimed, inter alia, to create an overview of modern passive safety elements especially cars. The work deals with elements of the passive safety system and the impact on the crew vehicle. It describes the principle of operation, especially airbags, safety belts, belt pretensioner and it includes solution of limiters tensioning force in the safety belt and other elements that have the task of reducing the consequences of a traffic accident. The use of modern elements of passive safety provides increased protection for the crew and eliminates the formation injuries crew. The technical issue is therefore closely related to the healthcare industry and in particular the Court of medicine in the field of personal injury in relation to the types and characters of incidents, or by applying of the safety elements. There are also shown the actual road accidents in which were killed or injured members of crew with an analysis of the mechanism of injury with the use or non-use of safety elements.
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Strain, stress and safety analysis of the car reinforcement frame
Dobeš, Martin ; Vosynek, Petr (referee) ; Vrbka, Jan (advisor)
This master thesis deals with the strain, stress and reliability analysis of the safety frame of racing car. The safety frame is a part of passive safety, which it becomes active in a case of impact. The safety frame makes a reinforcement of the car body and provides its sufficient stiffness. The first part of the master thesis is focused on determination of stress and strain states during the static loading tests and their analysis. The loading conditions are prescribed by homologation regulations of Fédération Internationale de l´Automobile (FIA). The problem is solved, making use of computational modeling utilizing the Finite Element Method (FEM). The first part of thesis is used for the stiffness and safety analysis under the static loading test. The second part deals with the effect of loading velocity on the stress and strain states using the computational modeling and solver LS-DYNA.
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Chassis Electrical Systems
Slaběňák, Patrik ; Kuchyňková, Hana (referee) ; Hájek, Vítězslav (advisor)
Travelling by bus is very extended in present and safety return home is a wish of every passenger. Outcome of this bachelor work is a survey of the most used stability systems, used in cars and facilitating the work of drivers in critic situations. Among others, this work contains the survey of powers acting on a vehicle during the ride. This powers influence impending slippery road on aggravated adhesive conditions. Individual systems are described attentively and supplemented by illustrating pictures, which near this issue and facilitate the real idea of functionality. At the conclusion of this work is mentioned the theoretical suggestion for practical exercising of a subject automobile electrotechnics and also a referring is mentioned to my continuation in this dissertation.
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Passive and active safety features in passenger cars
Jahoda, Patrik ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
This bachelor thesis deals with safety elements of all kinds in personal vehicles and their general introduction. This elements are divided and broadened and roughly described. My work contains short summary of history of safety elements. Conclusion contains evaluation of individual elements. Video with crash test is inserted in this graduate work.
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Design of rear bumper for passenger car
Tomeš, Jan ; Strecker, Zbyněk (referee) ; Klapka, Milan (advisor)
The Bachelor thesis deals with search about passenger car bumpers. It focuses especially on RCAR crash tests and currently used constructions of bumpers. There is suggested concept of rear bumper based on findings from the search. The concept was modeled on design study of Swell Company’s car.
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Race Car Passive Safety
Schultz, Richard ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This work presents all kinds of passive safety currently used in motorsport. It deals with their development, use, materials from which the element is made, the actual production and testing, irrespective of the particular category of motorsport. I tried to clarify the various elements in terms of function, what lies in their uniqueness and thus differ from those used for passive safety in passenger cars. Although the job title is Race cars passive safety, I mentioned in it about driver protective clothing as one of the elements to protect his life in case of emergency. Gradually, I deal with various aspects of security from leading to an accident as the first show its functionality to features such as fireproof clothing, seeking to mitigate the consequences of an accident.
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