Author(s)

A. Chattopadhyay, J.-S. Kim and Q. Liu

Abstract

Aeromechanical stability analysis and control of smart composite rotor blades A. Chattopadhyay, J.-S. Kim and Q. Liu Department of Mechanical and Aerospace Engineering Arizona State University, USA Abstract The use of active constrained damping layer (ACL) treatment is investigated for improved rotor aeromechanical stability. The rotor blade load-carrying member is modeled using a composite box beam with arbitrary wall thickness. The ACLs are bonded to the upper and lower surfaces of the box beam to provide active and passive damping in the aeromechanical stability analysis. A finite element model based on a hybrid displacement theory is used to accurately capture the transverse shear effects in the composite primary structure, the viscoelastic and the piezoelectric layers within the ACL. The Pitt-Peters dynamic inflow model is used in the air resonance analysis under hover condition. Rigid body pitch and roll degrees of freedom and fundamental flap and lead-lag modes are consid

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