Modelling of a blade couple with contact in shrouding by means of Rayleigh beam finite elements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F15%3A43926612" target="_blank" >RIV/49777513:23520/15:43926612 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of a blade couple with contact in shrouding by means of Rayleigh beam finite elements

Popis výsledku v původním jazyce

Presented work deals with modelling of a couple of twisted blades with rhombic shrouds (that are considered to be rigid). This blade couple is clamped into a rigid disk rotating with constant angular velocity. Either of the blades is divided into Rayleigh beam finite elements (blade finite elements) with varying cross-sectional parameters along each element and six degrees of freedom in each of the nodes. Since the finite element models based on the Rayleigh beam theory tend to slightly overrate naturalfrequencies and underrate deflections in comparison with finite element models including shear deformation effects, the Young's modulus, the Poisson's ratio and the torsion resistance of every blade finite element were being tuned. Then, a modal analysis of the rotating blade couple with smooth contact surfaces (without friction) is performed and comparison of calculated natural frequencies in dependence on rotational speed and contact stiffness between blade shrouds is shown.

Název v anglickém jazyce

Modelling of a blade couple with contact in shrouding by means of Rayleigh beam finite elements

Popis výsledku anglicky

Presented work deals with modelling of a couple of twisted blades with rhombic shrouds (that are considered to be rigid). This blade couple is clamped into a rigid disk rotating with constant angular velocity. Either of the blades is divided into Rayleigh beam finite elements (blade finite elements) with varying cross-sectional parameters along each element and six degrees of freedom in each of the nodes. Since the finite element models based on the Rayleigh beam theory tend to slightly overrate naturalfrequencies and underrate deflections in comparison with finite element models including shear deformation effects, the Young's modulus, the Poisson's ratio and the torsion resistance of every blade finite element were being tuned. Then, a modal analysis of the rotating blade couple with smooth contact surfaces (without friction) is performed and comparison of calculated natural frequencies in dependence on rotational speed and contact stiffness between blade shrouds is shown.

Druh

O - Ostatní výsledky

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů