This thesis deals with the stress-strain analysis of thick-walled pipe parts. The dimension series (characterized by the D/d ratio) of three components are solved, then a direct tube, a torus with constant wall thickness (arcus) and a torus with variable wall thickness (bend). At first, the internal pressure amount, when a fully plastic state for these components is created, is solved. The amount of the limit pressure is determined analytically, numerically and by appropriate normative relations. The results and stress diagrams of individual solutions are mutually compared. Furthermore, these components are solved in the creep and are exposed to the maximum allowable normative internal pressure for 200,000 hours according to the standard – the operating time of components. The place of the maximum equivalent creep strain and the place of the maximum equivalent stress is examined. In these places the principal stresses are depicted depending on the D/d ratio. The results and stress diagrams of individual dimension series are mutually compared. From the available literary sources the condition of the limit state reach is chosen, according to which the evaluation of the limit state reach for individual components is carried out.

This dissertation deals with the car trailer for wood transporting body frame concept. The main part of this work is a strength check of the supporting frame, further the design of suitable structural modifications and it’s check calculation of the stress state. The strength check of the frame is done by the help of the finite elements method. The part of this work is drawing documentation of the frame. This dissertation was developed in cooperation with SVAN Chrudim s.r.o., company.

This diploma thesis deals with a steel construction of crab frame of ladle crane with lifting capacity of 120 and 40 tons and maximum lifting height of 21 meters. The aim of the work is analysis and assessment of the support frame of crane with a load of fatigue according to ČSN 27 0103/89. For this analysis is used thin shell and beam model. The diploma thesis was developed in cooperation with the Královopolska a.s. company.

This master’s thesis deals with the design of the carrying frame of a lift cage with lift capacity of 675 kg. It’s main content is follow up strength analysis by Finite elements method (FEM). Thesis also contains the calculation of counterweight mass. Further is performed the calculation of the guide anchoring instituted for this steel structure and the strength analysis of the used guides according to norm ČSN EN 81-1. The thesis also includes the drawing of the carrying frame of the lift cage. Master’s thesis was carried out in co-operation with the LIFTMONT CZ company, Ltd.

This diploma thesis deals with the assessment of drafted steel construction of overhead travelling crane by using finite element method. The crane’s lifting capacity is 125t/32t. It is going to be placed in hall of Slovácké strojírny, a. s. in Uherský Brod. Span of the crane is 25.8 meters, wheelbase is 6.7 meters and lifting height is 17 meters. My work contains analysis and assessment of crane construction with a load of fatigue according to ČSN 27 0103.

This master’s thesis deals with strength analysis rear frame of forwarder LVS 520 and propose modifications of this frame. The main part of this work is strength analysis of the supporting frame of the original construction by the help of the finite elements method. Further the design of suitable structural modifications and strength analysis of the modified construction of frame. This master’s thesis has been prepared with Strojírna Novotný s.r.o. company cooperation.

Master’s thesis deals with application of new suspension means for personal elevator instead of conventional steel wire rope includes calculation of traction. Followed by assessment of passive resistance generated by guiding elevator on guide rails and caused by various locations of suspension and guiding (car guide rails). In the last part of thesis contains a strength analysis of car frame by Finite elements method (FEM) in programme NX I-deas.

The theme of this thesis is to create a conceptual study of the tunnel on high speed railway. Selection of suitable cross section and tunnelling method with considering of geological conditions of the site. Design of primary support and technological process of construction.

This thesis deals with bolted steel tanks, especially modification one of them. This modification is realized in cooperation with Kohimex spol. s r.o., which is assembling theese tanks for many years. The thesis continues on the bachelor one called "ASSEMBLED STEEL TANKS", which has already dealt with this issue. At the beginning of the thesis the issue of tanks is explained. Furthermore, there is made description of the tank modification details. At the next stage, the work presents stress-strain states of the tank, first for the current tank and then for the modified option. On the basis of completed analysis is made economic evaluation of design modified tank option due to the current tank. The results of this study allow better issue understanding of bolted tanks designing or they give impuls to improve the current way of designing.

Les travaux présentés s’intéressent à la réponse vibratoire et au champ acoustique émis par une structure immergée et excitée par une couche limite turbulente, dans le domaine des bas nombres d’ondes et pour un nombre de Mach faible. Ce travail s’inscrit dans la problématique d’amélioration de laprédiction du bruit rayonné dans ce type de configurations, et peut trouver son application à la discrétion acoustique des navires, ou à la caractérisation du bruit rayonné par des structures externes excitées par un écoulement.Numériquement, une analyse modale de la réponse de la structure en formulation (u,p,φ) est réalisée à l’aide du code élément finis Code_Aster. L’excitation est modélisée par une somme d’ondes planes de pression dont la densité spectrale est obtenue à partir des modèles d’excitation pariétale disponibles dans la littérature. Une analyse harmonique sur base modale est réalisée pour chaque cas de chargement.Cette approche permet la prise en compte du couplage fluide-structure dans le cas d’un fluide lourd et présente l’avantage de s’affranchir des hypothèses généralement faites, de fluide léger et d’orthogonalité des déformées modales.Les résultats issus de la modélisation numérique sont comparés à des données expérimentales, concernant le comportement vibratoire d’un dispositif constitué d’une plaque plane excitée par un écoulement généré en tunnel hydrodynamique. Les résultats numériques et expérimentaux observés sont proches,qu’il s’agisse du comportement global, du niveau spectral moyen en déplacement ou du niveau de pression acoustique mesuré. En complément, l’influence de défauts, constitués de marche montantes et descendantes de hauteur inférieure à l’épaisseur de la couche limite, sur l’excitation et la réponse de la structure est explorée expérimentalement. / The following work consist in the study of the vibroacoustic response of a structure submerged in fluid, under a turbulent boundary layer flow, the response of the structure is driven by the low wavenumber behaviour, for a small Mach number. This work aims at providing better means of predicting the noise radiated in such setups, mainly regarding stealthiness of ships and submarines and noise radiated by outer structures.A numerical modal analysis based on the (u,p,φ) formulation available in the finite element software Code_Aster is performed. The pressure induced by the boudary layer is then described as a sum of plane waves and several harmonical analysis are performed on the reduced problem, projected on the (u,p,φ) modal basis, one for each term of the sum. This allows us to account for the fluid-structure interaction (inertial and acoustic) in confined and infinite fluid domains. Most numerical models found in scientific papers are making the assumption of a light fluid, or a fluid loaded plate, thus not taking clearly into account the fluid-strucure interaction or only the inertialpart. Here the interaction due to the acoustic field radiated by the plate is fully accounted for.The validity of the proposed numerical method is assesed and numerical results are compared to data obtained from an experimental setup used within a hydrodynamic tunnel. Numerically, a good reproduction of the behaviour of the plate is obtained, both in terms of displacement and spectral levels. The acoustic levels are also compared to their numerical counterparts at the position of the transducer. Moreover, an experimantal analysis is performed, for backward and forward steps of height smaller than the thickness of the boundary layer, in order to investigate the influence of such configurations on the boundary layer excitation and on the vibroacoustic response.