Published October 30, 2024 | Version CC-BY-NC-ND 4.0
Journal article Open

Stiffness Optimization of Squirrel Cage in Aircraft Engines

Creators

  • 1. Sales & Marketing, ThyssenKrupp Aerospace India Private Limited, Bangalore (Karnataka), India.

Contributors

Contact person:

  • 1. Sales & Marketing, ThyssenKrupp Aerospace India Private Limited, Bangalore (Karnataka), India.
  • 2. Department of Projects, Zenith Precession, Bangalore (Karnataka), India.
  • 3. Department of Material Science, University of Colorado Boulder, Colorado, USA.
  • 4. Department of Computer Science, University of Detroit Mercy, Michigan, USA.

Description

Abstract: A squirrel cage is a component used in engine shafts to make the shaft stiffer and able to withstand high cycle fatigue loads continuously for a long time. A squirrel cage can be of many shapes and sizes. The critical speed and the stresses acting on the shaft play a key role in determining the performance of shafts in engines. The squirrel cage in the shaft absorbs stress and extends shaft life. This paper deals with the structural design and analysis of the squirrel cage of an aircraft engine. The design of the squirrel cage was done on SolidWorks, and analysis was carried out on the Ansys workbench. To meet the strength and stiffness, the squirrel cage was optimized by introducing slots in it. Stress analysis of the bearings has been carried out for axial and radial loads from 1 to 20 kg. The radial load is applied to individual bearings, and then the axial load is applied to only one bearing. Then results are plotted into curves, and a slope is obtained based on deformations obtained. The stiffness value is noted, and the same procedure is performed for an optimized slotted squirrel cage. These values are compared, and then the squirrel is proved to be weight optimized and has improved stiffness.

Files

E1068069520.pdf

Files (549.6 kB)

Name Size Download all
md5:af6fe7e4a7a55f137b41e2e6e1e17b91
549.6 kB Preview Download

Additional details

Identifiers

DOI
10.35940/ijeat.E1068.14011024
EISSN
2249-8958

Dates

Accepted
2024-10-15
Manuscript received on 17 June 2024 | Revised Manuscript received on 04 October 2024 | Manuscript Accepted on 15 October 2024 | Manuscript published on 30 October 2024.

References

  • Hagg, A. C. 'The influence of oil-film journal bearings on the stability of rotating machines', J. appl. Mech., Trans. Am. Soc. mech. Engr's 1946 68, A211. https://doi.org/10.1115/1.4009564
  • Pinkus, O. 'Experimental investigation of resonant whip', Trans. Am. Soc. mech. Engrs 1956 78, 975. https://doi.org/10.1115/1.4013891
  • Ozguven, H. N. and Ozkan, Z. L., "Whirl Speeds and Unbalance Response of Multibearing Rotors using Finite Elements," Journal of Vibration and Acoustics, Vol. 106, No. 1, pp. 72–79, 1984. https://doi.org/10.1115/1.3269158
  • A.M Sharan & J.S Rao., "Unbalance response of rotor disks supported by fluid film bearings with a negative cross coupled stiffness using influence coefficient method". Mechanism and Machine Theory. Volume 20, Issue 5, 1985, Pages 415-426. https://doi.org/10.1016/0094-114X(85)90046-1
  • G.C. Archer, "Object-oriented finite element analysis," Ph.D. Thesis, University of California at Berkeley, USA, 1996.
  • Rouch K.E., Kao J.S.,Dynamic Reduction in Rotor Dynamics by the Finite Element Method, Journ. of Mech. Design, apr. 1980, vol. 102, pp. 360–368. https://doi.org/10.1115/1.3254752
  • Dynamic Characterization of a Multistage Axial Compressor Test Rig Rotor System by Ramakrishna N. Bhat, N.C. Mahendrababu, Ajith Kumar, SASTECH Volume 9, Issue 1, April 2010.
  • Automatic Balancing of Rotor-Bearing Systems by Andrés Blanco- Ortega, Gerardo Silva-Navarro, Jorge Colín-Ocampo, Marco Oliver-Salazar, Gerardo Vela-Valdés (2012).
  • Kumar, M. V. S., & Nagaraju, D. C. (2020). Modeling of Amplitude and Frequency of Vibration for Rotor Bearing System using Ann and Taguchi Methods. In International Journal of Recent Technology and Engineering (IJRTE) (Vol. 9, Issue 1, pp. 162–169). https://doi.org/10.35940/ijrte.a1305.059120
  • Kondhalkar, G. E., & Diwakar, Dr. G. (2019). Effect of Various Defects in Roller Bearings and Ball Bearings on Vibration. In International Journal of Innovative Technology and Exploring Engineering (Vol. 8, Issue 12, pp. 5137–5141). https://doi.org/10.35940/ijitee.l2763.1081219
  • Omar, D. H., Belal, M. H., Dr., & Gomaa, F. R. (2021). Early Fault Detection by Vibration Measurement. In International Journal of Engineering and Advanced Technology (Vol. 10, Issue 5, pp. 358–365). https://doi.org/10.35940/ijeat.e2817.0610521
  • Varghese, A., Marri, M., & Chacko, Dr. S. (2023). Investigation of an Autonomous Vehicle's using Artificial Neural Network (ANN). In Indian Journal of Artificial Intelligence and Neural Networking (Vol. 3, Issue 6, pp. 1–11). https://doi.org/10.54105/ijainn.f1072.103623