Static fracture and modal analysis simulation of a gas turbine compressor blade and bladed disk system

Ralston Fernandes, Sami El-Borgi, Khaled Ahmed, Michael I. Friswell, Nidhal Jamia

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper presents a methodology for conducting a 3-D static fracture analysis with applications to a gas turbine compressor blade. An open crack model is considered in the study and crack-tip driving parameters are estimated by using 3-D singular crack-tip elements in ANSYS®. The static fracture analysis is verified with a special purpose fracture code (FRANC3D). Once the crack front is perfectly defined and validated, a free vibration study is conducted by analyzing the natural frequencies and modeshapes for both a single blade and bladed disk system. Taking advantage of high performance computing resources, a high fidelity finite element model is considered in the parametric investigation. In the fracture simulation, the influence of the size of a single edged crack as well as the rotational velocity on fracture parameters (stress intensity factors and J-Integral) are evaluated. Results demonstrate that for the applied loading condition, a mixed mode crack propagation is expected. In the modal analysis study, increasing the depth of the crack leads to a decrease in the natural frequencies of both the single blade and bladed disk system, while increasing the rotational velocity increases the natural frequencies. The presence of a crack also leads to mode localization for all mode families, a phenomenon that cannot be captured by a single blade analysis.

Original languageEnglish
Article number30
JournalAdvanced Modeling and Simulation in Engineering Sciences
Volume3
Issue number1
DOIs
Publication statusPublished - 1 Dec 2016

Fingerprint

Gas Turbine
Modal Analysis
Compressor
Modal analysis
Blade
Turbomachine blades
Gas turbines
Compressors
Crack
Cracks
Natural Frequency
Natural frequencies
Crack Tip
Simulation
Crack tips
3D
J-integral
Mixed Mode
Free Vibration
ANSYS

Keywords

  • Bladed disk system
  • Crack
  • Finite element analysis
  • Single blade
  • Singular elements
  • Static and modal analysis

ASJC Scopus subject areas

  • Modelling and Simulation
  • Applied Mathematics
  • Computer Science Applications
  • Engineering (miscellaneous)

Cite this

Static fracture and modal analysis simulation of a gas turbine compressor blade and bladed disk system. / Fernandes, Ralston; El-Borgi, Sami; Ahmed, Khaled; Friswell, Michael I.; Jamia, Nidhal.

In: Advanced Modeling and Simulation in Engineering Sciences, Vol. 3, No. 1, 30, 01.12.2016.

Research output: Contribution to journalArticle

@article{aa69324bf0864580a3a5e6e0bf1cee89,
title = "Static fracture and modal analysis simulation of a gas turbine compressor blade and bladed disk system",
abstract = "This paper presents a methodology for conducting a 3-D static fracture analysis with applications to a gas turbine compressor blade. An open crack model is considered in the study and crack-tip driving parameters are estimated by using 3-D singular crack-tip elements in ANSYS{\circledR}. The static fracture analysis is verified with a special purpose fracture code (FRANC3D). Once the crack front is perfectly defined and validated, a free vibration study is conducted by analyzing the natural frequencies and modeshapes for both a single blade and bladed disk system. Taking advantage of high performance computing resources, a high fidelity finite element model is considered in the parametric investigation. In the fracture simulation, the influence of the size of a single edged crack as well as the rotational velocity on fracture parameters (stress intensity factors and J-Integral) are evaluated. Results demonstrate that for the applied loading condition, a mixed mode crack propagation is expected. In the modal analysis study, increasing the depth of the crack leads to a decrease in the natural frequencies of both the single blade and bladed disk system, while increasing the rotational velocity increases the natural frequencies. The presence of a crack also leads to mode localization for all mode families, a phenomenon that cannot be captured by a single blade analysis.",
keywords = "Bladed disk system, Crack, Finite element analysis, Single blade, Singular elements, Static and modal analysis",
author = "Ralston Fernandes and Sami El-Borgi and Khaled Ahmed and Friswell, {Michael I.} and Nidhal Jamia",
year = "2016",
month = "12",
day = "1",
doi = "10.1186/s40323-016-0083-7",
language = "English",
volume = "3",
journal = "Advanced Modeling and Simulation in Engineering Sciences",
issn = "2213-7467",
publisher = "Springer Open",
number = "1",

}

TY - JOUR

T1 - Static fracture and modal analysis simulation of a gas turbine compressor blade and bladed disk system

AU - Fernandes, Ralston

AU - El-Borgi, Sami

AU - Ahmed, Khaled

AU - Friswell, Michael I.

AU - Jamia, Nidhal

PY - 2016/12/1

Y1 - 2016/12/1

N2 - This paper presents a methodology for conducting a 3-D static fracture analysis with applications to a gas turbine compressor blade. An open crack model is considered in the study and crack-tip driving parameters are estimated by using 3-D singular crack-tip elements in ANSYS®. The static fracture analysis is verified with a special purpose fracture code (FRANC3D). Once the crack front is perfectly defined and validated, a free vibration study is conducted by analyzing the natural frequencies and modeshapes for both a single blade and bladed disk system. Taking advantage of high performance computing resources, a high fidelity finite element model is considered in the parametric investigation. In the fracture simulation, the influence of the size of a single edged crack as well as the rotational velocity on fracture parameters (stress intensity factors and J-Integral) are evaluated. Results demonstrate that for the applied loading condition, a mixed mode crack propagation is expected. In the modal analysis study, increasing the depth of the crack leads to a decrease in the natural frequencies of both the single blade and bladed disk system, while increasing the rotational velocity increases the natural frequencies. The presence of a crack also leads to mode localization for all mode families, a phenomenon that cannot be captured by a single blade analysis.

AB - This paper presents a methodology for conducting a 3-D static fracture analysis with applications to a gas turbine compressor blade. An open crack model is considered in the study and crack-tip driving parameters are estimated by using 3-D singular crack-tip elements in ANSYS®. The static fracture analysis is verified with a special purpose fracture code (FRANC3D). Once the crack front is perfectly defined and validated, a free vibration study is conducted by analyzing the natural frequencies and modeshapes for both a single blade and bladed disk system. Taking advantage of high performance computing resources, a high fidelity finite element model is considered in the parametric investigation. In the fracture simulation, the influence of the size of a single edged crack as well as the rotational velocity on fracture parameters (stress intensity factors and J-Integral) are evaluated. Results demonstrate that for the applied loading condition, a mixed mode crack propagation is expected. In the modal analysis study, increasing the depth of the crack leads to a decrease in the natural frequencies of both the single blade and bladed disk system, while increasing the rotational velocity increases the natural frequencies. The presence of a crack also leads to mode localization for all mode families, a phenomenon that cannot be captured by a single blade analysis.

KW - Bladed disk system

KW - Crack

KW - Finite element analysis

KW - Single blade

KW - Singular elements

KW - Static and modal analysis

UR - http://www.scopus.com/inward/record.url?scp=85044267996&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044267996&partnerID=8YFLogxK

U2 - 10.1186/s40323-016-0083-7

DO - 10.1186/s40323-016-0083-7

M3 - Article

VL - 3

JO - Advanced Modeling and Simulation in Engineering Sciences

JF - Advanced Modeling and Simulation in Engineering Sciences

SN - 2213-7467

IS - 1

M1 - 30

ER -