TATIC AND DYNAMIC ANALYSIS FOR COMPOSITE ROTATING BEAMS USING LARGE DEFORMATION THEORY

Static and dynamic characteristics as well as varying rules of natural frequencies with the change of rotating velocity and ply angle of thin-walled large-deformation composite rotating beams are investigated. With assumption of quadratic strain through the thin-walled thick direction, the warping deformation is, according to Hamilton’s principle, formulated by setting up warping nodes on cross sections of the beam. Nonlinear finite element modeles for static and dynamic analysis considering the shear flexible theory and warping deflection of the large-deformation composite beam are developed. Also computing programs have been written out based on the analytical models. Nonlinear numeric static analysis for the large-deformation composite beam is carried out. The effects on natural frequencies with the change of rotating velocity, ply angle as well as Centrifugal and Coriolis force field are also analyzed. The computing results show that the models are suitable to analyze the static and dynamic characteristics of thin-walled large-deformation composite rotating beams. Compared with other pertinent literature results, the advantage of the model is obvious.