This paper deals with the behavior of electronic assemblies, which are loaded by the vibrations, especially in the context of computer simulations use. The main objective is to establish a procedure for determining the influence of vibration on the electronic boards and components using computer simulation; the definition of all factors affecting the accuracy of the result and evaluation of the individual influences.

The contens of master thesis is theoretical analysis of vibrations during turning and possibillity to eliminate them, measure dynamic compliance and modal paramteters. The goal of experimental part is to determine the effect of material and type of clamping for three shafts at natural frequency, mode shape and dynamic compliance. Using these results we can optimized cutting parameters and to better overcome vibration during machining.

This thesis deals with stress analysis of tandem platform trailer TVL10. The first part is devoted to description of trailers and their parts. The second part presents and evaluates the results of measuring acceleration and vibration of the trailer, and it describes the concrete chassis of a tandem trailer. There is included an analysis of the existing structure, design modifications and stress calculation and evaluation of newly designed chassis structure. The thesis is developed in cooperation with PANAV, a.s.

Diploma thesis is oriented at suspension of commercial vehicle and tractor cab. It describes current state-of-art suspension systems, methods of measuring and evaluating ride comfort. Developed multibody model of tractor is used to compare different suspension concepts and a sensitivity analysis of parameters related to ride comfort is made.

This doctoral thesis deals with the diagnostics of combustion engines, which have clearly suffered a mechanical damage. The text describes a basic principle of a diagnostics based on an observation of a noise of a running engine. There are mentioned the basic methods of a noise recording with direct conection to the specifics of measurement a running combustion engine noise. The introduction describes the spread of a vibration in solid structures. For the combustion engine vibration and source of noise is dedicated an independent chapter, which focuses on all noise generators, not only mechanical and thermodynamic but also noise caused by fluid and gas flowing. An integral part of the thesis is also a list and examples of signal processing, serving for efficient localization of the noise root cause. The noise statistics are compared with event diagram of engine investigation. Considering the information of the crank shaft position, we are then able to localize a possible root cause of the mechanical problem. For this purpose unique computer software for MS Windows operation system was developed. This system is able to generate event timelines of the piston engines. The inputs are basic engine data, such as the number of cylinders, ignition sequence, valve timing diagrams and information regarding two stroke or four stroke engine types. The program also allows us to detect a potential damage by direct comparison of the engine timeline and noise signal input. The thesis is also supplemented by measurements serving for key-parameter-diagnostics, i.e. the selection of the most suitable running engine operation. Comparison of different technical diagnostic approaches shows the suitability of mentioned diagnostic process.

The thesis proposes a methodology for damage identification of thrust bearings using acoustic emission method. The work is the way of the hydraulic loading of specimens and thrust bearings with programmable settings severity and duration of load cycles during contact fatigue tests at stations Axmat. They are designed structural adjustment elements (waveguides) to capture the acoustic emission signal selected apparatus, including the modification of software to capture the data. At the described experiments is verified functionality of the circular test specimens and axial bearings . Part of this work is to propose a new methodology for identifying early stages of contact fatigue using a combination of diagnostic methods.

The intention of this thesis is to occupy with the influence of a chain to a vibration level of a chainsaw. The first part of this work occupies with a theoretical approach to a vibration problem of a chainsaw, the causes of the vibration and their results, especially from the literary and internet sources. The main concern in the second part is the practical verification of the influence of the construction of chain saw chain change for the vibration of a chain saw. The vibration measurement was made by the cutting different kinds of wooden planks with three different chainsaw chains (POWERsharp, half-chiselled and chiseled profile of woodworking plane tooth). In the last part of this work I evaluate and make a remark of registered values tested chainsaw chains. It was made during the practical exam in the workshops of the Institute of Forestry and Wood Technology in Brno under the expert's supervision.

This thesis deals with the idea of energy harvesting from mechanical vibration. It describes the magnetostrictive principle as a possibility to obtain an electrical energy. It is about a generator made of a beam with Terfenol-D material and a coil. The model of this device is created in Matlab/Simulink and FEMM application. For various values of measured vibration, these methods are then compared. In FEMM, you can improve energy gain by modeling of various environmental conditions and with using of another materials (e.g. by adding of permanent magnets). The outcome of the this thesis expresses the ability to harvest the energy with designed magnetostrictive generator compared to the already created models of the piezoelectric and electromagnetic generator. Based on these results, it is possible to determine which generator is more suitable for particular application.

The thesis is focused on the analysis of the acoustic properties of the interior of the passenger car by using the finite element method. Part of the work is an analysis of the excitation effects of individual vibration sources and the evaluation of the response in the interior of the cabin with a focus on the passengers of the vehicle and also solving the problem of the design of structural modifications in order to reduce the noise inside the cabin.

This final diploma thesis deals with the issue of vibration and noise measurement of transmission devices. The research part describes the basic issues of noise and vibration generation, their measurement, as well as sources of vibrations in gear units. The practical part deals with the design proposal of the attachment of the experimental single-stage gearbox and the load dynamometer to the anechoic chamber including the drawings. Further, by checking the modal properties of the proposed test stand, using the finite element method, the analytical and numerical control of the torsional vibrations of the rotating parts with respect to the expected frequency ranges of use.