Aeroelastic stability of wing/pylon/rotor coupled system for tiltrotor aircraft in forward flight

作者：Yang ChaoMin; Xia PinQi^*

来源：Science in China - Series E: Technological Sciences , 2011, 54(10): 2708-2715.

DOI：10.1007/s11431-011-4454-5

• tiltrotor aircraft
• aeroelastic stability
• elastic coupling
• forward flight

An analytical model for aeroelastic stability of the wing/pylon/rotor coupled system with elastic bending-twist coupling wing for tiltrotor aircraft in forward flight has been established in this paper. The investigation is focused on the effectiveness of the wing elastic bending-twist couplings provided by composite wing beam on the aeroelastic stability for the wing/pylon/rotor coupled system. By introducing the different wing elastic bending-twist couplings into the Boeing's test model, the aeroelastic stability of the Boeing's test model with different wing elastic bending-twist couplings has been analyzed. The numerical results indicate that the negative wing beamwise bending-twist elastic coupling (the wing upward beamwise bending engenders the nose-down torsion of the wing section) can saliently enhance the stability of the wing beamwise bending modal. The positive wing chordwise bending-twist elastic coupling (the wing forward chordwise bending engenders the nose-down torsion of the wing section) has a great benefit for increasing the stability of the wing chordwise bending modal.

• 出版日期2011-10
• 单位南京大学