Vibration Behaviour of a Disc Assembly with a Cracked Lacing Wire

Dariusz Szwedowicz; Carlos Acosta; Jorge Bedolla; Eladio Martinez

doi:10.4028/www.scientific.net/KEM.293-294.451

Paper Titles

Genetic Algorithms Based Rubbing Location Identification in a Rotor System
p.417

Bush Skewness Defect in Journal Bearing as an Example of Knowledge Base Development
p.425

Acceptable Dislocation of Bearings of the Turbine Set Considering Permissible Vibration and Load of the Bearings
p.433

Effect of Shaft Unbalance on the Operation of Worm Gear Rolling Bearings
p.441

Vibration Behaviour of a Disc Assembly with a Cracked Lacing Wire
p.451

Model Based SHM - Rotating Machinery Application
p.459

Time-Frequency Feature Extraction without Cross-Terms Based on Acoustic Signal in Rotor Malfunctions
p.467

Diagnosis of Local Fault and Identification of Transient Fault Force in Rotating Machinery
p.475

Multi-Fault Classifier Based on Support Vector Machine and Its Application
p.483

HomeKey Engineering MaterialsKey Engineering Materials Vols. 293-294Vibration Behaviour of a Disc Assembly with a...

Vibration Behaviour of a Disc Assembly with a Cracked Lacing Wire

Abstract:

In this paper, mathematical descriptions of the static and dynamic behaviour of the bladed disc with the undamaged and damaged lacing wire are briefly explained. For a steam turbine disc with 70 axial blades coupled by the lacing wire, the centrifugal static analysis is performed. Then, the free and forced vibrations are computed to find differences in vibrations of the bladed disc with and without a failure in the lacing wire. The tip timing measurement is considered as an experimental tool for identifications of possible failures. According to the obtained FE results, a failure of the lacing wire in the rotating disc assembly can be identified by monitoring the centrifugal deformations of the blade tips, resonance frequencies and response amplitudes of the whole bladed disc. The dynamic behaviours of the failure-free disc and with cracked wire connection are compared to each other to outline differences in the known nodal diameter and dispersion curve definition.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 293-294)

Pages:

451-458

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.293-294.451

Citation:

Cite this paper

Online since:

September 2005

Authors:

Dariusz Szwedowicz, Carlos Acosta, Jorge Bedolla, Eladio Martinez

Keywords:

Axial Turbine Steam Blade, Centrifugal Deformation, Finite Element Model (FEM), Forced Vibration, Free Vibration, Lacing Wire

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] N. N: Magazine of Modern Power Systems (1995), p.49.

Google Scholar

[2] B.L. Jaiswal and S.K. Bhave: Journal of Sound and Vibration Vol. 177 (1994), p.111.

Google Scholar

[3] W.P. Sander: Turbine Steam Path Engineering For Operations and Maintenance Staff (TurboTechnic Services Incorporated, Canada 1988).

Google Scholar

[4] D. Szwedowicz: ASME Paper 98-WA/DE-6 (1998), p.1.

Google Scholar

[5] R. Laczkowski: Vibrations of Components of Thermal Turbines (in Polish) (WNT, Poland 1974).

Google Scholar

[6] O.C. Zienkiewicz and Y.K., Cheung: The Finite Element Method in Structural and Continuum Mechanics (McGraw-Hill, USA 1967).

Google Scholar

[7] ABAQUS/Standard: User's Manual Vol. I-III, (Hibbit, Karlsson & Sorensen Inc., USA 2002).

Google Scholar

[8] H. Jones: Mechanical Engineering Vol. 118/ No. 11 (1996), p.94.

Google Scholar

[9] R.S. Abhari and M. Giles: Transactions of the ASME, J. of Turbomachinery Vol. 119 (1997), p.77.

Google Scholar

[10] D. Szwedowicz, Vibration Characteristic of Rotating Damaged Disc Assemblies (Proc. of the 1999 International Joint Power Generation Conference, USA 1999).

Google Scholar