Random vibration of a rotating blade with external and internal damping by the finite element method

C. L. Chen, Lien-Wen Chen

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The finite element model is employed to investigate the mean-square response of a rotating blade with external and internal damping under stationary or non-stationary random excitation. The blade is considered to be subjected to white-noise and earthquake excitations. The effects of rotational speed, external and internal damping on the mean-square response are studied. It is found that the mean-square response decreases quickly when the external and internal damping increases within some scope. Moreover, the increment of rotational speed will reduce the mean-square response of a rotating blade. It is also found that the mean-square response decreases when the low natural frequency of base decreases. Inversely, the mean-square response increases when the high natural frequency of base (natural frequencies of base are over the first natural frequency of blade) decreases. The reliability of a rotating blade subjected to stationary or non-stationary excitations is also obtained.

Original languageEnglish
Pages (from-to)697-715
Number of pages19
JournalJournal of Sound and Vibration
Volume252
Issue number4
DOIs
Publication statusPublished - 2002 May 9

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

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