Dynamic analysis of rotating beams with nonuniform cross sections using the dynamic stiffness method

This study develops dynamic analysis based on the dynamic stiffness method for a rotating beam of nonuniform cross-section. To deal with nonuniform be ams, coefficients related to material and geometric properties in the equat ion of motion are expressed in a polynomial form. A dynamic stiffness matri x is accordingly formulated in terms of power series. The dynamic response of the rotating beam is calculated by performing modal analysis. It is demo nstrated that the present method provides an alternative to the finite elem ent method in dealing with nonuniform rotating beams.