Analysis of the vibration behaviors of rotating composite nano‐annular plates based on nonlocal theory and different plate theories

Abstract

Rotating machinery has significant applications in the fields of micro and nano meters, such as nano‐turbines, nano‐motors, and biomolecular motors, etc. This paper takes rotating nano-annular plates as the research object to analyze their free vibration behaviors. Firstly, based on Kirchhoff plate theory, Mindlin plate theory, and Reddy plate theory, combined with nonlocal con-stitutive relations, the differential motion equations of rotating functionally graded nano‐annular plates in a thermal environment are derived. Subsequently, the numerical method is used to discre-tize and solve the motion equations. The effects of nonlocal parameter, temperature change, inner and outer radius ratio, and rotational velocity on the vibration frequencies of the nano‐annular plates are analyzed through numerical examples. Finally, the relationship between the fundamental frequencies and the thickness‐to‐radius ratio of the nano‐annular plates of clamped inner and outer rings is discussed, and the differences in the calculation results among the three plate theories are compared.