Scholarlink

Background <p>Rotor bearing system is often succumbed to unanticipated vibrations and instability due to interacting faults like unbalance and misalignment, which are detrimental to both machine life and reliability. Therefore, a thorough understanding of this coupling effect is essential for fault detection in condition monitoring. This study investigates dynamic response of rotor system under combined unbalance and angular misalignment defect.</p> Methods <p>Empirical based Dimensional Analysis (DA) model has been developed, considering different degrees of rotor speed, unbalance, angular misalignment as well as characteristics representing non-linear behaviour of rotor bearing system. Initially, vibration responses are collected on laboratory test rig to investigate the combined effect of varying levels of misalignment and unbalance. Moreover, these results are utilized to train the DA model.</p> Results <p>The results indicate that unbalance predominantly excites the fundamental (1X) frequency component, while angular misalignment contributes to higher harmonic responses such as 2X. When these defects occur simultaneously, a strong coupling effect is observed, leading to nonlinear interaction between the vibration components and altering the overall vibration pattern.</p> Conclusion <p>The developed dynamic analysis model incorporating bearing, coupling, and contact nonlinearities shows close agreement with experimental observations with a deviation less than 8%.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dynamic Analysis of a Rotor–Bearing System Under Unbalanced and Coupling Misalignment through an Experimentally Validated Model

  • 期刊论文

  • 发表日期：

    2026年6月19日

查看全文
  • Ganesh L. Suryawanshi,
  • Prashant S. Jadhav,
  • Ramchandra G. Desavale

摘要

Background

Rotor bearing system is often succumbed to unanticipated vibrations and instability due to interacting faults like unbalance and misalignment, which are detrimental to both machine life and reliability. Therefore, a thorough understanding of this coupling effect is essential for fault detection in condition monitoring. This study investigates dynamic response of rotor system under combined unbalance and angular misalignment defect.

Methods

Empirical based Dimensional Analysis (DA) model has been developed, considering different degrees of rotor speed, unbalance, angular misalignment as well as characteristics representing non-linear behaviour of rotor bearing system. Initially, vibration responses are collected on laboratory test rig to investigate the combined effect of varying levels of misalignment and unbalance. Moreover, these results are utilized to train the DA model.

Results

The results indicate that unbalance predominantly excites the fundamental (1X) frequency component, while angular misalignment contributes to higher harmonic responses such as 2X. When these defects occur simultaneously, a strong coupling effect is observed, leading to nonlinear interaction between the vibration components and altering the overall vibration pattern.

Conclusion

The developed dynamic analysis model incorporating bearing, coupling, and contact nonlinearities shows close agreement with experimental observations with a deviation less than 8%.