Dynamics of a pretwisted blade under nonconstant rotating speed

S. M. Yang, S. M. Tsao

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


An analytical model is presented to investigate the vibration and stability of a pretwisted blade under nonconstant rotating speed which is characterized by a periodic perturbation. The time-dependent rotating speed leads to a system with six parametric instability regions in primary and combination resonances. Each instability is predicted using the multiple scale method and validated by the numerical results of a more detailed model. The analyses show that the combination resonance at about twice the fundamental frequency is the most critical aspect and is sensitive to system parameter variation. This instability can be minimized by either increasing the pretwist angle or decreasing the stagger angle.

Original languageEnglish
Pages (from-to)643-651
Number of pages9
JournalComputers and Structures
Issue number4
Publication statusPublished - 1997 Feb

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Materials Science(all)
  • Mechanical Engineering
  • Computer Science Applications


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