Rotor blade vibration reduction has become an important consideration in aerospace engineering, turbomachinery, automobile engineering, etc. In the design of rotorcraft and wind turbines there is always a need to reduce the rotor blade vibration to maintain the stability and operational life of the whole structure.
Multi-Element Multi-Path Design (MEMP):
The approach to be explored in this research to solve vibration problem is the multi-element multi-path (MEMP) structures that inherently suppress vibration. The following figures show the evolution of this concept on helicopter rotor blades.>
Cut-off for a Beam on a Suspension
Wave Reflection at Boundaries
Simulation results suggest that the MEMP design has huge capacity to reduce the hub vibration. Important factors that affect such vibration reduction include the elastic coupling , bending stiffness and mass of the structure. But the large relative deflection between the two beams, conceptualized as an internal spar and airfoil shell, remains a problem for further study.