Abstract
Based on the finite rotating beam element model with variable cross section, the vibration characteristics of a swept back rotor blade are analysed. To grasp the effects of tip geometries on its natural frequencies and mode shapes, vibration testings on the model blades with various plan forms are also conducted. The node lines of the rotating blades are measured remotely by utilizing the syncronized still video pictures on a CRT. The comparisons of numerical results with experimental ones show well coincidence and usefulness of the proposed method is ascertained.
