TY - GEN
T1 - Fluidlastic absorbers for lagwise loads reduction of rotor blades
AU - Han, Dong
AU - Smith, Edward C.
PY - 2013
Y1 - 2013
N2 - To reduce the troublesome second harmonic lagwise load in stiff in-plane rotor blades, tuned fluidlastic absorbers are proposed to be embedded in the blade cavity. The aeroelastic simulation of the coupled blade and fluidlastic absorber system is based on the generalized force formulation. The results indicate that placing an embedded fluidlastic absorber in the blade chordwise direction can reduce the second harmonic lagwise root bending moment by more than 85% at different steady flight states, which means fluidlastic absorbers are an effective means to control this load. The corresponding stroke of the absorber is limited within 2% blade chord length. Increasing tuning port area ratio is an effective means to reduce the stroke with relatively small influence on the performance of the absorber. The effects of the tuning frequency of the absorber, the damping, initial position, forward speed, and flight altitude on the performance of the absorber are also studied.
AB - To reduce the troublesome second harmonic lagwise load in stiff in-plane rotor blades, tuned fluidlastic absorbers are proposed to be embedded in the blade cavity. The aeroelastic simulation of the coupled blade and fluidlastic absorber system is based on the generalized force formulation. The results indicate that placing an embedded fluidlastic absorber in the blade chordwise direction can reduce the second harmonic lagwise root bending moment by more than 85% at different steady flight states, which means fluidlastic absorbers are an effective means to control this load. The corresponding stroke of the absorber is limited within 2% blade chord length. Increasing tuning port area ratio is an effective means to reduce the stroke with relatively small influence on the performance of the absorber. The effects of the tuning frequency of the absorber, the damping, initial position, forward speed, and flight altitude on the performance of the absorber are also studied.
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M3 - Conference contribution
AN - SCOPUS:84904428174
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 - 201
EP - 213
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 -