TY - GEN
T1 - Trim analysis of a bearingless rotor based on improved flexible multi-body dynamics
AU - Eun, Wonjong
AU - Cho, Haeseong
AU - Ryu, Hanyeol
AU - Shin, Sang Joon
AU - Kee, Young Jung
PY - 2013
Y1 - 2013
N2 - This paper presents an improved structural analysis for a bearingless helicopter rotor. To control its pitch angle, it adopts tosionally soft flexbeam instead of a conventional pitch bearing. Because of its unique structural characteristics and multiple load paths, it will be generally difficult to predict the internal loads in a bearingless rotor. To enhance the reliability of analysis and predict the deflection of the blade accurately, bearingless rotor requires more precise structural analysis. In this paper, a geometrically exact beam formulation is used to describe nonlinear behavior of the rotating beam elements. To implement multi-body analysis, multiple beam elements are assembled. The present structural model is coupled with the finite-state aerodynamics. Finally, trim analysis will be carried out, and the blade deformation/internal load will be predicted. The present prediction upon the rotor responses and aerodynamics will be compared with those by CAMRAD II.
AB - This paper presents an improved structural analysis for a bearingless helicopter rotor. To control its pitch angle, it adopts tosionally soft flexbeam instead of a conventional pitch bearing. Because of its unique structural characteristics and multiple load paths, it will be generally difficult to predict the internal loads in a bearingless rotor. To enhance the reliability of analysis and predict the deflection of the blade accurately, bearingless rotor requires more precise structural analysis. In this paper, a geometrically exact beam formulation is used to describe nonlinear behavior of the rotating beam elements. To implement multi-body analysis, multiple beam elements are assembled. The present structural model is coupled with the finite-state aerodynamics. Finally, trim analysis will be carried out, and the blade deformation/internal load will be predicted. The present prediction upon the rotor responses and aerodynamics will be compared with those by CAMRAD II.
UR - https://www.scopus.com/pages/publications/84904438130
M3 - Conference paper
AN - SCOPUS:84904438130
SN - 9781632662828
T3 - American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
SP - 172
EP - 179
BT - American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
PB - American Helicopter Society International
T2 - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
Y2 - 8 September 2013 through 11 September 2013
ER -