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Influence of the number of blades in the dynamic behavior of groups; Influencia del numero de alabes en el comportamiento dinamico de grupos

Abstract

In this article a research is made of the change of natural frequencies of groups formed by different number of blades. To estimate the natural frequencies and the vibration modes, the finite element is used, modeling real blades with beam elements. The models employed represent groups of two to ten blades tied up together by two dampening wires and an external belt, also modeled with beam elements . The angular rigidities at the intersection between the blades and the dampening wires and with the external belt were simulated with border elements. The analytical results were compared with laboratory and field values for a single blade and a group of ten blades. [Espanol] En este articulo se investiga el cambio de frecuencias naturales en grupos formados por diferente numero de alabes. Para calcular las frecuencias naturales y los modos de vibracion, se utiliza el metodo del elemento finito, modelando alabes reales con elementos viga. Los modelos utilizados representan grupos de dos a diez alabes unidos por dos alambres amortiguadores y un cinturon externo. Los alambres amortiguadores y el cinturon externo tambien se modelaron con elementos viga. Las rigideces angulares en los puntos de interseccion entre los alabes con los alambres amortiguadores  More>>
Authors:
Yrigoyen Lazzeri, Oscar [1] 
  1. Instituto de Investigaciones Electricas, Cuernavaca (Mexico)
Publication Date:
Dec 31, 1986
Product Type:
Miscellaneous
Report Number:
ETDE-MX-99717754
Reference Number:
SCA: 200000; 990200; PA: MX-98:000264; EDB-99:044850; SN: 98002024112
Resource Relation:
Other Information: DN: Sep-Oct 1986 issue; PBD: 1986; Related Information: Is Part Of IIE Bulletin: selected articles from 1986 issues of ``boletin iie``; PB: [240] p.; IIE Bulletin, v. (10)5
Subject:
20 FOSSIL-FUELED POWER PLANTS; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; TURBINE BLADES; STEAM TURBINES; FINITE ELEMENT METHOD; DYNAMICAL GROUPS; DESIGN; NUMERICAL DATA
OSTI ID:
334024
Country of Origin:
Mexico
Language:
Spanish
Other Identifying Numbers:
Journal ID: ISSN 0185-0059; Other: ON: DE99717754; TRN: MX9800264
Availability:
OSTI as DE99717754
Submitting Site:
MX
Size:
pp. 181-184
Announcement Date:

Citation Formats

Yrigoyen Lazzeri, Oscar. Influence of the number of blades in the dynamic behavior of groups; Influencia del numero de alabes en el comportamiento dinamico de grupos. Mexico: N. p., 1986. Web.
Yrigoyen Lazzeri, Oscar. Influence of the number of blades in the dynamic behavior of groups; Influencia del numero de alabes en el comportamiento dinamico de grupos. Mexico.
Yrigoyen Lazzeri, Oscar. 1986. "Influence of the number of blades in the dynamic behavior of groups; Influencia del numero de alabes en el comportamiento dinamico de grupos." Mexico.
@misc{etde_334024,
title = {Influence of the number of blades in the dynamic behavior of groups; Influencia del numero de alabes en el comportamiento dinamico de grupos}
author = {Yrigoyen Lazzeri, Oscar}
abstractNote = {In this article a research is made of the change of natural frequencies of groups formed by different number of blades. To estimate the natural frequencies and the vibration modes, the finite element is used, modeling real blades with beam elements. The models employed represent groups of two to ten blades tied up together by two dampening wires and an external belt, also modeled with beam elements . The angular rigidities at the intersection between the blades and the dampening wires and with the external belt were simulated with border elements. The analytical results were compared with laboratory and field values for a single blade and a group of ten blades. [Espanol] En este articulo se investiga el cambio de frecuencias naturales en grupos formados por diferente numero de alabes. Para calcular las frecuencias naturales y los modos de vibracion, se utiliza el metodo del elemento finito, modelando alabes reales con elementos viga. Los modelos utilizados representan grupos de dos a diez alabes unidos por dos alambres amortiguadores y un cinturon externo. Los alambres amortiguadores y el cinturon externo tambien se modelaron con elementos viga. Las rigideces angulares en los puntos de interseccion entre los alabes con los alambres amortiguadores y con el cinturon externo se simularon con elementos frontera. Se comparan resultados analiticos con valores de laboratorio y de campo para un alabe sencillo y un grupo de diez alabes.}
place = {Mexico}
year = {1986}
month = {Dec}
}