Thermally Induced Vibrations of Spinning Composite Structures

Abstract

In this paper, the coupled thermal-structural analysis of the spinning composite beam appendages is performed to investigate the motion with the interaction of the structural deformations and incident heating. Additionally, the thermal flutter problem is studied with the stability analysis. The appendage is modelled with the composite thin-walled tube so that the structural analysis is based on the thin-walled beam theory including the transverse shear deformation and the rotary inertia as well as the primary and secondary warping effects. The 2dimensional heat transfer is considered in the thermal analysis. In addition, spinning motion of the beam should affect the changes of the heating surface for the structures. The conservation of energy is used for the thermal analysis, while Hamilton’s principle is adapted for the structural analysis. Finite element method is applied to get the numerical data. The coupled thermal-structural analysis responses are compared with the uncoupled results. In addition, the dynamic responses and the stability criteria for the coupled analysis are studied in detail.