Resonant stress determination of a turbine blade with modal damping as a function of rotor speed and vibrational amplitude

Abstract

An iterative procedure is proposed to determine the resonant stresses of turbomachinery blading using the damping coefficient as a function of not only the rotating speed but also of vibrational amplitude. The results obtained are compared with previous analytical results obtained by 'average' damping values and experimental results. Significant improvement has been shown with the proposed procedure.