Vrednovanje zaostalih naprezanja u zavaru metodom bušenja otvora

Residual stresses arise in the structures without loading during the technological processes, e.g. casting, rolling, welding, and pressing. In the paper is described the process of quantification of residual stresses by the hole-drilling method. For determination of residual stresses were used the procedures in which are supposed constant or linear distributions of stresses along the hole.Zaostala naprezanja nastaju u neopterećenim izradcima tijekom tehnoloških procesa, npr., pri odlijevanju, valjanju, zavarivanju i prešanju. U članku je opisan postupak vrednovanja zaostalih naprezanja u zavarenom spoju primjenom metode bušenja otvora. Za određivanje zaostalih naprezanja rabljen je postupak u kojemu se predmnijeva stalna ili linearna raspodjela naprezanja duž otvora

Vrednovanje zaostalih naprezanja u zavaru metodom bušenja otvora

Residual stresses arise in the structures without loading during the technological processes, e.g. casting, rolling, welding, and pressing. In the paper is described the process of quantification of residual stresses by the hole-drilling method. For determination of residual stresses were used the procedures in which are supposed constant or linear distributions of stresses along the hole.Zaostala naprezanja nastaju u neopterećenim izradcima tijekom tehnoloških procesa, npr., pri odlijevanju, valjanju, zavarivanju i prešanju. U članku je opisan postupak vrednovanja zaostalih naprezanja u zavarenom spoju primjenom metode bušenja otvora. Za određivanje zaostalih naprezanja rabljen je postupak u kojemu se predmnijeva stalna ili linearna raspodjela naprezanja duž otvora

Quantification of Residual Stresses in Hot Rolled Steel Sheets by the Hole Drilling Method

The paper deals with the problems of quantification of residual stresses in hot rolled sheets produced under various regimes. On the base of stress distribution along width and thickness of the belt is pointed out on possibilities of belt deformation from the plane as a result of action of torsional moment as an integral internal quantity in cross-section. For the non-uniformly distributed stresses along the thickness of the sheet the new method for residual stresses determination was developed. Application of the method is described in the paper

The Strain Gage Method for Determination of Input Working Life Parameters of Pipes in Compressor Stations

For determination of safety operation of compressor stations and assessment of their residual working life is necessary to know the levels of residual stresses, operational loading as well as functionality of real support elements and influence of history of previous loading. The method described in the paper was verified several times during solution of problems concerning safety operation of piping yards. The method was also verified by the numerical methods of mechanics

Generování textu ze strukturovaných dat

V tejto bakalárskej práci skúmame možnosti generovania textu v prirodzenom ja- zyku podmieneného štruktúrovanými vstupnými dátami. Konkrétne trénujeme hlboké neurónové siete na datasete RotoWire, ktorý obsahuje štatistické údaje o basketbalovom zápase spárované s ich súhrnmi. Najprv analyzujeme dataset a navrhneme niekoľko me- tód preprocessingu (napríklad Byte Pair Encoding). Následne trénujeme základný model založený na architektúre Encoder-Decoder na pripravenom datasete. Popíšeme niekoľko problémov základného modelu a skúmame niekoľko pokročilých neurónových architektúr, ktoré majú tieto problémy riešiť (Copy Attention, Content Selection, Content Planning). Naša analýza naznačuje, že modely nedokážu pochopiť štruktúru vstupných dát. Navr- hujeme preto metódu na zjednodušenie jej zložitosti. Náš najlepší model vytrénovaný na zjednodušených dátach prekonáva základný model o viac ako 5 bodov BLEU. 1In this thesis we examine ways of conditionally generating document-scale natural language text given structured input data. Specifically we train Deep Neural Network models on RotoWire dataset containing statistical data about basketball matches paired with descriptive summaries. First, we analyse the dataset and propose several prepro- cessing methods (e.g. Byte Pair Encoding). Next, we train a baseline model based on the Encoder-Decoder architecture on the preprocessed dataset. We discuss several prob- lems of the baseline and explore advanced Deep Neural Network architectures that aim to solve them (Copy attention, Content Selection, Content Planning). We hypothesize that our models are not able to learn the structure of the input data and we propose a method reducing its complexity. Our best model trained on the simplified data manages to outperform the baseline by more than 5 BLEU points. 1Institute of Formal and Applied LinguisticsÚstav formální a aplikované lingvistikyMatematicko-fyzikální fakultaFaculty of Mathematics and Physic

Methodology for Experimental Analysis of Pipeline System Vibration

AbstractThere are presented two methods used for an investigation of modal parameters, concretely natural frequencies and modal shapes of a significantly simplified model of compressor yard pipeline system in this article. The first one is an experimental method and uses experimental modal analysis for that purpose with using of system Pulse6. The second method is finite element method and was performed in software Solid Works. The pipeline was built in on one side and elastically supported on the other side. The modal parameters of a pipeline system were evaluated for two cases. First one where springs of pipeline support were not preloaded and second one where preload was applied

Research of Mechanical Properties of Piping Yards in the Assessment of their Safe Operation

Working life of piping yards of compressor stations is mainly influenced by material parameters of particular structural members. In the paper are given the results of static and dynamic tests of basic as well as welded joint material of pipe of compressor station for which were determined conditions for safe operation

Increasing of Reliability of Converter

The innovative activities in steel production invoke exploitation of new machines with the higher production capacity and productivity of labor. The paper deals with deformation and stress analysis of carrying parts of converter pedestal on the base of which the proposals and supporting measures were made that had the aim to increase reliability of the converter during steel production. This was achieved by lifespan prolongation of anchor and connecting bolts of converter pedestal, by change of stiffness of connected elements as well as by correction of nuts of bolted connections. The realization of structural changes decreased loading amplitudes and consequently the vibrations of pedestal. Solution was verified by numerical and experimental procedures of mechanics

The Strain Gage Method for Determination of Input Working Life Parameters of Pipes in Compressor Stations

For determination of safety operation of compressor stations and assessment of their residual working life is necessary to know the levels of residual stresses, operational loading as well as functionality of real support elements and influence of history of previous loading. The method described in the paper was verified several times during solution of problems concerning safety operation of piping yards. The method was also verified by the numerical methods of mechanics

Increasing of Reliability of Converter

The innovative activities in steel production invoke exploitation of new machines with the higher production capacity and productivity of labor. The paper deals with deformation and stress analysis of carrying parts of converter pedestal on the base of which the proposals and supporting measures were made that had the aim to increase reliability of the converter during steel production. This was achieved by lifespan prolongation of anchor and connecting bolts of converter pedestal, by change of stiffness of connected elements as well as by correction of nuts of bolted connections. The realization of structural changes decreased loading amplitudes and consequently the vibrations of pedestal. Solution was verified by numerical and experimental procedures of mechanics