In the last few decades, intensive research has been carried out on viscoelastic materials. Among them, most importantly polymers and composites thereof find extensive applications in engineering structures and rotors primarily due to quite high strength to weight ratio in comparison with metals. In dynamic modeling of rotor bearing system, incorporation of damping is very important as stationary (external) damping always helps in stability, however rotary damping (internal) promotes instability of rotors above a certain speed. Therefore for modeling point of view, it is very important to consider both internal or external damping effect. For this reason, the dissipation mechanism has been handled in such a way that it provides proper forces irrespective of its presence in a stationary or a rotary frame. Also in present work, both classical method and operator multiplier method are suggested to derive the equations of motion. The analysis also shows the stability zones of the rotor bearing system for various parametric values of different viscoelastic supports. It is found that choosing a right viscoelastic support can increase the stability criteria of the system to some extent.
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ASME 2017 Gas Turbine India Conference
December 7–8, 2017
Bangalore, India
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5851-6
PROCEEDINGS PAPER
Parametric Study of Stability Criteria for Rotor Bearing Model With Viscoelastic Support
S. Chandraker,
S. Chandraker
Indian Institute of Technology, New Delhi, India
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J. K. Dutt,
J. K. Dutt
Indian Institute of Technology, New Delhi, India
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H. Roy
H. Roy
National Institute of Technology, Rourkela, India
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S. Chandraker
Indian Institute of Technology, New Delhi, India
J. K. Dutt
Indian Institute of Technology, New Delhi, India
H. Roy
National Institute of Technology, Rourkela, India
Paper No:
GTINDIA2017-4781, V002T05A029; 7 pages
Published Online:
February 2, 2018
Citation
Chandraker, S, Dutt, JK, & Roy, H. "Parametric Study of Stability Criteria for Rotor Bearing Model With Viscoelastic Support." Proceedings of the ASME 2017 Gas Turbine India Conference. Volume 2: Structures and Dynamics; Renewable Energy (Solar, Wind); Inlets and Exhausts; Emerging Technologies (Hybrid Electric Propulsion, UAV,..); GT Operation and Maintenance; Materials and Manufacturing (Including Coatings, Composites, CMCs, Additive Manufacturing); Analytics and Digital Solutions for Gas Turbines/Rotating Machinery. Bangalore, India. December 7–8, 2017. V002T05A029. ASME. https://doi.org/10.1115/GTINDIA2017-4781
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