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Analysing the Dynamic Interaction Between Unbalance and Crack Responses in a Jeffcott Rotor Supported by Foil Bearings: A Numerical Study

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Emerging Trends in Mechanical and Industrial Engineering

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

The present paper analyses the vibrational behaviour of an unbalanced and cracked Jeffcott rotor supported by foil bearings. Foil bearings have numerous advantages over rolling element bearings due to their significant operational limitations as well as suitable for only lower speed mechanical and other applications. Incorporating the equivalent stiffness concept of shaft and foil bearing and considering the forces due to inertia, unbalance and crack faults, the dynamic equations for the vibration of an unbalanced Jeffcott rotor with a crack nearby disc at the middle mounted on foil bearings have been derived. The mechanism of a switching crack has been utilized to analyse the crack fault effect which manifests multiple harmonics in the vibrational nature of the system. The displacement responses in transverse directions have been obtained using the Simulink block diagram. Full spectrum data analysis has also been performed to transform the time domain response into the frequency domain, which gives rise to both the forward and backward rotor whirls. The main emphasis of this paper would be to exhibit the interplay between unbalance and crack faults in a Jeffcott rotor system supported by foil bearings.

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Authors and Affiliations

  1. Department of Mechanical Engineering, NIT Manipur, Imphal West, Manipur, 795004, India

    Prabhat Kumar, Chingkhomba Arambam, Lourembam Dinesh Singh & Ningthoujam Dingku Singh

Authors
  1. Prabhat Kumar
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  2. Chingkhomba Arambam
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  3. Lourembam Dinesh Singh
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  4. Ningthoujam Dingku Singh
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Corresponding author

Correspondence to Prabhat Kumar .

Editor information

Editors and Affiliations

  1. Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada

    Xianguo Li

  2. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, China

    Mohammad Mehdi Rashidi

  3. Department of Mechanical Engineering, The NorthCap University, Gurugram, Haryana, India

    Rohit Singh Lather

  4. Department of Mechanical Engineering, The NorthCap University, Gurugram, India

    Roshan Raman

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Kumar, P., Arambam, C., Singh, L.D., Singh, N.D. (2023). Analysing the Dynamic Interaction Between Unbalance and Crack Responses in a Jeffcott Rotor Supported by Foil Bearings: A Numerical Study. In: Li, X., Rashidi, M.M., Lather, R.S., Raman, R. (eds) Emerging Trends in Mechanical and Industrial Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-6945-4_73

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  • DOI: https://doi.org/10.1007/978-981-19-6945-4_73

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-19-6944-7

  • Online ISBN: 978-981-19-6945-4

  • eBook Packages: EngineeringEngineering (R0)

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