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A modal approach to identify fatigue damage in threaded connections of large scale tubular structures in a resonant bending test rig

TienThanh Bui, Edwin Reynders, Guido De Roeck, Jeroen Van Wittenberghe, Patrick De Baets UGent and Wim De Waele UGent (2011) 8th international conference on structural dynamics, Proceedings. p.1623-1628
abstract
The current work aims at using a modal approach to detect fatigue damage of threaded connections in large scale tubular structures. A full scale resonant bending fatigue test rig has been developed to test at first a plain pipe with notches. Two kinds of vibration testing are used for fatigue crack detection. Forced vibration tests (input-output) are performed before and after the fatigue test, in which input signals from forced excitation as well as output signals from accelerometers and dynamic strain gauges are both recorded. Whereas, the ambient vibration test (output only) follows the fatigue experiment. The modal parameters of the structure can be determined from the acquired data using subspace identification algorithms, i.e. the Reference-based Combined Deterministic-Stochastic Subspace Identification one for the forced vibration tests and the Reference-based Stochastic Subspace Identification one for the ambient vibration test. An observed change in the extracted modal parameters implies the degradation of the bending stiffness when a fatigue crack initiates. The modal approach demonstrates to be a viable and reliable way to detect fatigue cracks in large scale tubular structures. This potentiality makes vibration based testing a complement to conventional approaches like e.g. global deflection control; moreover, it is rather simple to implement and can be used for longterm monitoring.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
Ambient, vibration test, Modal analysis., Forced vibration test, Resonant bending test rig, Threaded connection, Subspace identification, Pipeline
in
8th international conference on structural dynamics, Proceedings
editor
Guide De Roeck, G Degrande, G Lombaert and G Müller
pages
1623 - 1628
publisher
Ghent University, Department of Mechanical construction and production
place of publication
Ghent, Belgium
conference name
8th International Conference on Structural Dynamics (Eurodyn - 2011)
conference location
Leuven, Belgium
conference start
2011-07-04
conference end
2011-07-06
ISBN
9789076019314
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1860054
handle
http://hdl.handle.net/1854/LU-1860054
date created
2011-07-15 16:26:18
date last changed
2017-01-02 09:53:06
@inproceedings{1860054,
  abstract     = {The current work aims at using a modal approach to detect fatigue damage of threaded connections in large scale tubular structures. A full scale resonant bending fatigue test rig has been developed to test at first a plain pipe with notches. Two kinds of vibration testing are used for fatigue crack detection. Forced vibration tests (input-output) are performed before and after the fatigue test, in which input signals from forced excitation as well as output signals from accelerometers and dynamic strain gauges are both recorded. Whereas, the ambient vibration test (output only) follows the fatigue experiment. The modal parameters of the structure can be determined from the acquired data using subspace identification algorithms, i.e. the Reference-based Combined Deterministic-Stochastic Subspace Identification one for the forced vibration tests and the Reference-based Stochastic Subspace Identification one for the ambient vibration test. An observed change in the extracted modal parameters implies the degradation of the bending stiffness when a fatigue crack initiates. The modal approach demonstrates to be a viable and reliable way to detect fatigue cracks in large scale tubular structures. This potentiality makes vibration based testing a complement to conventional approaches like e.g. global deflection control; moreover, it is rather simple to implement and can be used for longterm monitoring.},
  author       = {Bui, TienThanh and Reynders, Edwin and De Roeck, Guido and Van Wittenberghe, Jeroen and De Baets, Patrick and De Waele, Wim},
  booktitle    = {8th international conference on structural dynamics, Proceedings},
  editor       = {De Roeck, Guide and Degrande, G and Lombaert, G and M{\"u}ller, G},
  isbn         = {9789076019314},
  keyword      = {Ambient,vibration test,Modal analysis.,Forced vibration test,Resonant bending test rig,Threaded connection,Subspace identification,Pipeline},
  language     = {eng},
  location     = {Leuven, Belgium},
  pages        = {1623--1628},
  publisher    = {Ghent University, Department of Mechanical construction and production},
  title        = {A modal approach to identify fatigue damage in threaded connections of large scale tubular structures in a resonant bending test rig},
  year         = {2011},
}

Chicago
Bui, TienThanh, Edwin Reynders, Guido De Roeck, Jeroen Van Wittenberghe, Patrick De Baets, and Wim De Waele. 2011. “A Modal Approach to Identify Fatigue Damage in Threaded Connections of Large Scale Tubular Structures in a Resonant Bending Test Rig.” In 8th International Conference on Structural Dynamics, Proceedings, ed. Guide De Roeck, G Degrande, G Lombaert, and G Müller, 1623–1628. Ghent, Belgium: Ghent University, Department of Mechanical construction and production.
APA
Bui, T., Reynders, E., De Roeck, G., Van Wittenberghe, J., De Baets, P., & De Waele, W. (2011). A modal approach to identify fatigue damage in threaded connections of large scale tubular structures in a resonant bending test rig. In Guide De Roeck, G. Degrande, G. Lombaert, & G. Müller (Eds.), 8th international conference on structural dynamics, Proceedings (pp. 1623–1628). Presented at the 8th International Conference on Structural Dynamics (Eurodyn - 2011), Ghent, Belgium: Ghent University, Department of Mechanical construction and production.
Vancouver
1.
Bui T, Reynders E, De Roeck G, Van Wittenberghe J, De Baets P, De Waele W. A modal approach to identify fatigue damage in threaded connections of large scale tubular structures in a resonant bending test rig. In: De Roeck G, Degrande G, Lombaert G, Müller G, editors. 8th international conference on structural dynamics, Proceedings. Ghent, Belgium: Ghent University, Department of Mechanical construction and production; 2011. p. 1623–8.
MLA
Bui, TienThanh, Edwin Reynders, Guido De Roeck, et al. “A Modal Approach to Identify Fatigue Damage in Threaded Connections of Large Scale Tubular Structures in a Resonant Bending Test Rig.” 8th International Conference on Structural Dynamics, Proceedings. Ed. Guide De Roeck et al. Ghent, Belgium: Ghent University, Department of Mechanical construction and production, 2011. 1623–1628. Print.