Open Collections

UBC Theses and Dissertations

UBC Theses Logo
Featured Collection

UBC Theses and Dissertations

Finite element analysis on vibration behavior and fatigue cracking prediction of a Francis type hydraulic turbine Chan, Sze Bun

Abstract

GMS turbine cracking problem was investigated using finite element analysis. Analysis results confirmed that fatigue cracking could occur due to resonance induced by pressure variation as turbine blades pass wicket gates. Analyses also showed that fatigue life could be extremely low due to extremely high cycles experienced by the turbine. Installation of blade stiffeners and thickness modifications could change the natural frequency of the turbine. However, the modifications could cause efficiency reduction, cavitation behavior change or structural weakness. Therefore no feasible modifications were suggested.

Item Metadata

Title
Finite element analysis on vibration behavior and fatigue cracking prediction of a Francis type hydraulic turbine
Creator
Chan, Sze Bun
Publisher
University of British Columbia
Date Issued
1999
Description
GMS turbine cracking problem was investigated using finite element analysis. Analysis results confirmed that fatigue cracking could occur due to resonance induced by pressure variation as turbine blades pass wicket gates. Analyses also showed that fatigue life could be extremely low due to extremely high cycles experienced by the turbine. Installation of blade stiffeners and thickness modifications could change the natural frequency of the turbine. However, the modifications could cause efficiency reduction, cavitation behavior change or structural weakness. Therefore no feasible modifications were suggested.
Extent
10304397 bytes
Genre
Thesis/Dissertation
Type
Text
File Format
application/pdf
Language
eng
Date Available
2009-06-18
Provider
Vancouver : University of British Columbia Library
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
DOI
10.14288/1.0080888
URI
http://hdl.handle.net/2429/9445
Degree
Master of Applied Science - MASc
Program
Mechanical Engineering
Affiliation
Applied Science, Faculty of; Mechanical Engineering, Department of
Degree Grantor
University of British Columbia
Graduation Date
1999-11
Campus
UBCV
Scholarly Level
Graduate
Aggregated Source Repository
DSpace

Item Media

Item Citations and Data

Rights

For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.