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April 4, 2026Transactions of the JSME (in Japanese)Open Access

A method for predicting critical speed and damping ratio from open-loop characteristics of a rotating shaft

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Authors

KKKengo KOMORITHTakuya HOTEHAMAWSWataru SUGIMURA

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Overview

The method predicts critical speed and damping ratio in rotating machinery, implying safer operation under vibration.

Key Points

  • To develop a method for predicting critical speed and damping ratio using unbalanced vibration measurements without exceeding critical speed.
  • Proposes a predictive method based on open-loop characteristics of a rotating shaft.
  • Calculates approximated characteristics from measured unbalanced-vibration responses during field balancing.
  • Validates the method using hardware-in-the-loop simulations of a rotor model.
  • Successfully predicts critical speed and damping ratio without exceeding the critical speed.
  • Demonstrates the feasibility of the method with effective simulation results.

Cite This Study

KOMORI et al. (2026) studied this question.

synapsesocial.com/papers/69d0aefd659487ece0fa4e52https://doi.org/10.1299/transjsme.25-00207
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