Standard Article

Rotary Wing Aeroelasticity

Structural Technology

Aeroelasticity and Aeroservoelasticity

  1. Peretz P. Friedmann

Published Online: 15 DEC 2010

DOI: 10.1002/9780470686652.eae155

Encyclopedia of Aerospace Engineering

Encyclopedia of Aerospace Engineering

How to Cite

Friedmann, P. P. 2010. Rotary Wing Aeroelasticity. Encyclopedia of Aerospace Engineering. .

Author Information

  1. University of Michigan, Department of Aerospace Engineering, Ann Arbor, MI, USA

Publication History

  1. Published Online: 15 DEC 2010


This chapter provides an introduction to rotary wing aeroelasticity (RWA). Basic rotor configurations in use currently are described. Fundamental differences between RWA and fixed wing aeroelasticity are identified. The methodology for formulation and solution of the RWA problem is given, followed by a limited number of illustrative results. These examples illustrate several key problems in RWA such as the coupled flap–lag and coupled flap–lag–torsional isolated blade stability in hover, followed by the coupled rotor–fuselage problem in hover. Comprehensive rotorcraft analysis codes are also discussed, and their application to bearingless rotor stability analysis is illustrated. Modeling of composite blades is also briefly described. The chapter describes noteworthy current activities and concludes by discussing future developments.


  • rotary wing aeroelasticity;
  • aeroelasticity;
  • rotorcraft aeromechanics;
  • VTOL vehicles;
  • helicopter dynamics;
  • helicopter aeroelasticity