Basic aeroelastic stability studies of hingeless rotor blades in hover using geometrically exact beam and finite-state inflow

Mohammadreza Amoozgar, Alessandro Croce, Carlo E.D. Riboldi, Lorenzo Trainelli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An approach to aeroelastic stability analysis of hingeless rotor blades in hover is presented which combines a geometrically exact beam theory and a three-dimensional finite-state dynamic inflow theory, using the Cp-Lambda finite-element multibody code. The aeroelastic system is solved by an efficient numerical integration scheme, and the lead-lag damping is determined from the time response results. The method is validated by application to a two-bladed hingeless rotor without precone, and a remarkable agreement with reference results is observed, in dependence of the number of finite inflow states. Then, results are obtained with positive and negative precone angles, showing the effect of these variations on lead-lag stability.

Original languageEnglish
Title of host publication43rd European Rotorcraft Forum, ERF 2017
PublisherAssociazione Italiana di Aeronautica e Astronautica (AIDAA)
Pages1195-1202
Number of pages8
Volume2
ISBN (Print)9781510865389
Publication statusPublished - Dec 2017
Externally publishedYes
Event43rd European Rotorcraft Forum - Milan, Italy
Duration: 12 Sep 201715 Sep 2017
Conference number: 43
https://vtol.org/events/43rd-european-rotorcraft-forum-erf

Conference

Conference43rd European Rotorcraft Forum
Abbreviated titleERF 2017
CountryItaly
CityMilan
Period12/09/1715/09/17
Internet address

Fingerprint

rotor blades
rigid rotors
Turbomachine blades
time lag
Rotors
Lead
time response
numerical integration
Damping
damping

Cite this

Amoozgar, M., Croce, A., Riboldi, C. E. D., & Trainelli, L. (2017). Basic aeroelastic stability studies of hingeless rotor blades in hover using geometrically exact beam and finite-state inflow. In 43rd European Rotorcraft Forum, ERF 2017 (Vol. 2, pp. 1195-1202). Associazione Italiana di Aeronautica e Astronautica (AIDAA).
Amoozgar, Mohammadreza ; Croce, Alessandro ; Riboldi, Carlo E.D. ; Trainelli, Lorenzo. / Basic aeroelastic stability studies of hingeless rotor blades in hover using geometrically exact beam and finite-state inflow. 43rd European Rotorcraft Forum, ERF 2017. Vol. 2 Associazione Italiana di Aeronautica e Astronautica (AIDAA), 2017. pp. 1195-1202
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abstract = "An approach to aeroelastic stability analysis of hingeless rotor blades in hover is presented which combines a geometrically exact beam theory and a three-dimensional finite-state dynamic inflow theory, using the Cp-Lambda finite-element multibody code. The aeroelastic system is solved by an efficient numerical integration scheme, and the lead-lag damping is determined from the time response results. The method is validated by application to a two-bladed hingeless rotor without precone, and a remarkable agreement with reference results is observed, in dependence of the number of finite inflow states. Then, results are obtained with positive and negative precone angles, showing the effect of these variations on lead-lag stability.",
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Amoozgar, M, Croce, A, Riboldi, CED & Trainelli, L 2017, Basic aeroelastic stability studies of hingeless rotor blades in hover using geometrically exact beam and finite-state inflow. in 43rd European Rotorcraft Forum, ERF 2017. vol. 2, Associazione Italiana di Aeronautica e Astronautica (AIDAA), pp. 1195-1202, 43rd European Rotorcraft Forum, Milan, Italy, 12/09/17.

Basic aeroelastic stability studies of hingeless rotor blades in hover using geometrically exact beam and finite-state inflow. / Amoozgar, Mohammadreza; Croce, Alessandro; Riboldi, Carlo E.D.; Trainelli, Lorenzo.

43rd European Rotorcraft Forum, ERF 2017. Vol. 2 Associazione Italiana di Aeronautica e Astronautica (AIDAA), 2017. p. 1195-1202.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Amoozgar M, Croce A, Riboldi CED, Trainelli L. Basic aeroelastic stability studies of hingeless rotor blades in hover using geometrically exact beam and finite-state inflow. In 43rd European Rotorcraft Forum, ERF 2017. Vol. 2. Associazione Italiana di Aeronautica e Astronautica (AIDAA). 2017. p. 1195-1202