Development of a New Aeroelastic Tiltrotor Wind Tunnel Testbed

Kreshock, Andrew R.; Acree, C. W.; Kang, Hao; Yeo, Hyeonsoo

doi:10.2514/6.2019-2133

Cited by 12 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where ( ) is a function of the input spectrum and the input characteristics of the system. Equation (23) shows that the autospectrum of the output can be approximated by a sum of modal contributions if ( ) is reasonably flat at least for the band of interest of a specific mode. A further simplification can be introduced with the assumption of suitably separated modes reducing Eq.…”

Section: Periodic Operational Modal Analysis (Poma)mentioning

confidence: 99%

“…Currently, in the USA, a U.S. Army-coordinated program called TRAST is ongoing for developing a testbed for tiltrotor aeroelasticity investigations [2,23,[55][56][57]. Another effort is taking place at the University of Maryland, where a reconfigurable wind-tunnel tiltrotor model is being developed [11,50,53] and recently underwent preliminary Whirl-Flutter stability tests [19,51].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Whirl–Flutter analysis of a tiltrotor semi-span wind tunnel model

et al. 2022

View full text Add to dashboard Cite

This work presents the modeling and preliminary Whirl–Flutter stability results achieved within the Advanced Testbed for TILtrotor Aeroelastics (ATTILA) CleanSky2 project. The project addresses the design, manufacturing, and testing of a semi-span wind-tunnel model of the Next Generation Civil TiltRotor. The preliminary multibody models developed in support of the wind-tunnel testbed design are described, illustrating the modeling technique of each subcomponent of the model, namely the wing, the rotor, the blades, and the yoke. The methodologies used to analyze the stability of systems subjected to periodic aerodynamic excitation when the problem is modeled using full-featured multibody solvers are presented in support of Whirl–Flutter identification during wind-tunnel testing.

show abstract

Section: Periodic Operational Modal Analysis (Poma)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Whirl–Flutter analysis of a tiltrotor semi-span wind tunnel model

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The TILTAERO and ADYN Machscaled tests [11] in the DNW Large Low-speed Facility (LLF) investigated the aerodynamic performance and aeroelastic stability of the ERICA tiltrotor concept [12]. Meanwhile, the US Army and NASA are pursuing continued generic tiltrotor aeroelastic research with the TiltRotor Aeroelastic Stability Testbed (TRAST) [13,17] which will accommodate both a gimballed and hingeless rotor. The Maryland Tiltrotor Rig (MTR) is another contemporary tiltrotor test rig that has been developed at the University of Maryland [18][19][20] and has recently been subjected to preliminary whirl-flutter stability tests [21,22].…”

Section: Introductionmentioning

confidence: 99%

Design of a Tiltrotor Semi-Span Wind Tunnel Model for Whirl Flutter Investigations

Hoff

Vilsteren

Cocco

et al. 2023

AIAA SCITECH 2023 Forum

View full text Add to dashboard Cite

The Clean Sky 2 Advanced Testbed for TILtrotor Aeroelastics (ATTILA) project is aimed at the design, manufacturing and testing of a semi-span aeroelastic wind tunnel model of the Next Generation Civil TiltRotor (NGCTR). This paper provides a description of the ATTILA tiltrotor whirl flutter testbed design, as well as the design and test methodology and associated numerical modelling. In advance of the first wind tunnel test entry, the design activities rely on multi-level code-to-code validation as presented herein to improve confidence in the flutter predictions. The available numerical tools have been used to tailor the design to the desired flutter characteristics in the presence of the limitations associated with testing in Froude-scale conditions. Robustness of the predictions and design is investigated through parametric variations associated with modelling assumptions and design features. Finally, an outlook on the future dynamic characterization and wind tunnel test activities is provided.

show abstract