Finite beam elements for rotating piezoelectric fiber composite structures

摘要

Piezoelectric fiber composites with their dynamic characteristics, tailorable anisotropic properties, and high degree of integration provide excellent prospects for the structural actuation task. The concept of an active beam with such a material system can be applied to helicopter rotor blades in order to reduce vibrations and noise due to different aeroelastic interactions. The most effective way to actively influence the blade dynamics is to make use of the aerodynamic forces by changing the angle of attack. Thus the goal is to investigate the potential of induced torsion and its different possible actuation schemes on the dynamic behavior of the rotating system. For this purpose a finite beam element formulation is derived and the results are validated with aid of a commercial finite element code.