Publication detail
Fluid-Structure Interaction
MALENOVSKÝ, E.
Czech title
Analýza dynamických vlastností interakce poddajné struktury s magneto rheologickými tekutinami tekutinami
English title
Fluid-Structure Interaction
Type
miscellaneous
Language
en
Original abstract
This program is focused on the analysis of dynamic behavior of elastic body moving in liquid. In many technical applications this motion is with large displacements. Some technical applications can be vibration of blades or rotors in centrifugal pumps or water turbines. But on other hand presented approach has more general application. In general case dynamic behavior are the modal behavior, steady state response and nonstationary response. Because of are assumed the large displacements, this analysis is nonlinear and modal behavior depends on a parameters. In this software is presented the mathematical model of a new type of boundary conditions which allowed the modal analysis and computing the steady state response. In principle this analysis is if the frequency domain. It is necessary provided some testing, because this approach is new. For this case, the curvilinear co-ordinates were chosen. The Bézier body was chosen for the description of geometrical configuration and also for approximation the solution. MATLAB programme code was chosen for software processing
Czech abstract
Program je zaměřen na analýzu dynamických vlastností pružných těles, pohybujících se v tekutině. Metodika řešení je vysvětlena na popisu nestacionárního pohybu prutu v reálné, nestlačitelné kapalině. Princip řešení je založen na modální transformaci prutu a diskretizaci metodou konečných prvků. Problém je v obecnosti nelineární. Metoda v práci uvedená však umožňuje řešit problém v časových krocích. Řešení se opírá o jistou substituci, která umožní postupně oddělit pohyb kapaliny od pohybu prutu. Tato substituce se zavádí analogicky jako u tuhého tělesa na konečném prvku v závislosti na normálních souřadnicích. Výsledkem je tenzor přídavných účinků na konečném prvku. Nový výpočtový model je verifikován pomocí experimentu.
English abstract
This program is focused on the analysis of dynamic behavior of elastic body moving in liquid. In many technical applications this motion is with large displacements. Some technical applications can be vibration of blades or rotors in centrifugal pumps or water turbines. But on other hand presented approach has more general application. In general case dynamic behavior are the modal behavior, steady state response and nonstationary response. Because of are assumed the large displacements, this analysis is nonlinear and modal behavior depends on a parameters. In this software is presented the mathematical model of a new type of boundary conditions which allowed the modal analysis and computing the steady state response. In principle this analysis is if the frequency domain. It is necessary provided some testing, because this approach is new. For this case, the curvilinear co-ordinates were chosen. The Bézier body was chosen for the description of geometrical configuration and also for approximation the solution. MATLAB programme code was chosen for software processing
Keywords in Czech
Interakce těles s tekutinami, metoda konečných prvků, přídavná hmotnost, přídavné tlumení
Keywords in English
Fluid structure interaction, finite element method, added mass, added damping
Released
01.11.2012