Stiffness modeling for near field acoustic levitation bearings

Yaoke Wang, Ping Guo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The dynamic characteristics of near field levitation bearings have been investigated in this study. Through theoretical analysis, two different types of system stiffness are defined and derived analytically. The dynamic stiffness relates the excitation amplitude to the dynamic force amplitude, while the effective stiffness governs the time-averaged force-displacement relationship. The results indicate two non-linear and asymmetric spring constants that can effectively predict levitation force and height. The models are verified with a carefully designed experimental setup to eliminate the structural resonance effect. Besides, some unique dynamic behaviors are investigated and predicted based on the proposed stiffness model.

Original languageEnglish (US)
Article number204102
JournalApplied Physics Letters
Issue number20
StatePublished - May 17 2021

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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