Blades Forced Vibration Under Aero-Elastic Excitation Modeled by Van der Pol

Kód výsledku v IS VaVaI

RIV/61388998:_____/17:00482040 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1142/S0218127417501668

DOI - Digital Object Identifier

10.1142/S0218127417501668

Jazyk výsledku

angličtina

Název v původním jazyce

Blades Forced Vibration Under Aero-Elastic Excitation Modeled by Van der Pol

Popis výsledku v původním jazyce

This paper employs a new analytical approach to model the influence of aerodynamic excitationnon the dynamics of a bladed cascade at the flutter state. The flutter is an aero-elastic phenomenonnthat is linked to the interaction of the flow and the traveling deformation wave in the cascadenwhen only the damping of the cascade changes. As a case study the dynamic properties of thenfive-blade-bunch excited by the running harmonic external forces and aerodynamic self-excitednforces are investigated. This blade-bunch is linked in the shroud by means of the viscous-elasticndamping elements. The external running excitation depends on the ratio of stator and rotor bladennumbers and corresponds to the real type of excitation in the steam turbine. The aerodynamicnself-excited forces are modeled by two types of Van der Pol nonlinear models. The influence of theninteraction of both types of self-excitation with the external running excitation is investigatednon the response curves.

Název v anglickém jazyce

Blades Forced Vibration Under Aero-Elastic Excitation Modeled by Van der Pol

Popis výsledku anglicky

This paper employs a new analytical approach to model the influence of aerodynamic excitationnon the dynamics of a bladed cascade at the flutter state. The flutter is an aero-elastic phenomenonnthat is linked to the interaction of the flow and the traveling deformation wave in the cascadenwhen only the damping of the cascade changes. As a case study the dynamic properties of thenfive-blade-bunch excited by the running harmonic external forces and aerodynamic self-excitednforces are investigated. This blade-bunch is linked in the shroud by means of the viscous-elasticndamping elements. The external running excitation depends on the ratio of stator and rotor bladennumbers and corresponds to the real type of excitation in the steam turbine. The aerodynamicnself-excited forces are modeled by two types of Van der Pol nonlinear models. The influence of theninteraction of both types of self-excitation with the external running excitation is investigatednon the response curves.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

GA16-04546S: Aeroelastické vazby a dynamické chování rotačně periodických těles

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

International Journal of Bifurcation and Chaos

ISSN

0218-1274

e-ISSN

—

Svazek periodika

27

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000416035500004

EID výsledku v databázi Scopus

2-s2.0-85034822134