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Description
| - Některé děje odehrávající se v cévách mohou být simulovány na tokem kapaliny v elastické trubici. Náš příspěvek se zabývá experimentálním studiem samobuzených oscilací v tenkostěnné elastické trubici. Samobuzené kmitání je děj, kdy elastická trubice ztrácí svoji stabilitu a přejde do režimu oscilací. To vše vlivem kontinuálního toku kapaliny bez vnějšího buzení. Pro sledování tohoto děje byla sestavena experimentální linka. Při experimentech byly sledovány hodnoty středního průtoku a tlaků na vstupu a výstupu z elastické trubice. Byly nalezeny zjednodušené vztahy pro výpočet efektivního průřezu a modulu pružnosti trubice při oscilacích. Analýza dat ukázala že frekvence kmitáni trubice je závislá na poměru tloušťky steny trubice a jejího průměru. Režim oscilací je také ovlivněn transmurálním tlakem. (cs)
- Our paper studies experimentally the self-excited oscillations of thin-walled elastic tubes with respect to the Korotkoff sounds. The self-excited oscillation is a phenomenon, when an elastic tube looses stability of its shape and starts to oscillate, loaded only by continual flow, therefore without any external excitation. An experimental set-up was designed for the experiments. The mean flow rates, pressures at the ends of the tube and external pressures were recorded under various modes of oscillation. The effective cross-section and elastic modulus of the tube were calculated by simplified formulas. The data analysis showed an increase of the oscillation frequency with a decrease of the tube wall compliance. It means the frequency of the oscillation is dependent on ratio of the wall thickness and the tube diameter. The mode of the oscillation is also influenced by the transmural pressure.
- Our paper studies experimentally the self-excited oscillations of thin-walled elastic tubes with respect to the Korotkoff sounds. The self-excited oscillation is a phenomenon, when an elastic tube looses stability of its shape and starts to oscillate, loaded only by continual flow, therefore without any external excitation. An experimental set-up was designed for the experiments. The mean flow rates, pressures at the ends of the tube and external pressures were recorded under various modes of oscillation. The effective cross-section and elastic modulus of the tube were calculated by simplified formulas. The data analysis showed an increase of the oscillation frequency with a decrease of the tube wall compliance. It means the frequency of the oscillation is dependent on ratio of the wall thickness and the tube diameter. The mode of the oscillation is also influenced by the transmural pressure. (en)
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Title
| - Self-excited oscillations of an elastic tube
- Samobuzené oscilace elastické trubice (cs)
- Self-excited oscillations of an elastic tube (en)
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skos:prefLabel
| - Self-excited oscillations of an elastic tube
- Samobuzené oscilace elastické trubice (cs)
- Self-excited oscillations of an elastic tube (en)
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skos:notation
| - RIV/68407700:21220/06:02122859!RIV07-MSM-21220___
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http://linked.open...avai/riv/aktivita
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http://linked.open...avai/riv/aktivity
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http://linked.open...vai/riv/dodaniDat
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http://linked.open.../riv/druhVysledku
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http://linked.open...titaPredkladatele
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http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21220/06:02122859
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - biomechanics; self-excited oscillation; thin-walled elastic tube (en)
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http://linked.open.../riv/klicoveSlovo
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http://linked.open...UplatneniVysledku
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http://linked.open...iv/tvurceVysledku
| - Chlup, Hynek
- Maršík, František
- Konvičková, Svatava
- Macková, Hana
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http://linked.open...n/vavai/riv/zamer
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https://schema.org/isbn
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http://localhost/t...ganizacniJednotka
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