Nonlinear vibration characteristics of rotating composite blade considering the temperature-dependent graded material properties

摘要

In order to study the influence of temperature rise on the vibration characteristics of rotating composite blade with thermal barrier coatings (TBCs), this paper presents a dynamic model of rotating blade with TBC and analyzes its nonlinear vibration characteristics under transverse harmonic excitation. Considering the nonlinear temperature distribution and temperature-dependent material properties graded in the thickness direction, a dynamic model of rotating blade with TBC is established based on the third-order shear deformation theory and Hamilton's principle. The natural characteristics analysis of rotating blade with TBC is conducted at high temperature and room temperature, respectively. For the case of 1:3 internal resonance and primary parametric resonance, the vibration response characteristics of rotating blade with TBC are studied, and the results indicate that the softening-type nonlinearity of rotating blade with TBC is strengthened due to the temperature rise. The evolution law of nonlinear dynamic behaviors are finally obtained for rotating blade with TBC at high temperature.