The invention discloses a design method capable of expanding an air resonance security boundary of a helicopter, relates to a design method capable of expanding the security boundary of air resonance appearing in the helicopter in the flying speed and force lifting overloading state, and belongs to the technical field of dynamic design of the helicopter. According to the rotor blade operation pneumatic environment of the flying state stipulated by a flight envelope which needs to consider a cover and properly exceeds the performance requirement of the helicopter, unstability of the air resonance is analyzed, and the pitch control stiffness is improved to the air resonance insensitive range; the width of paddle rear edge adjusting sheets and distribution of the paddle rear edge adjusting sheets in the expanding direction are increased, so that an equivalent aerodynamic center moves backwards; and the paddle aeroelasticity coupling characteristics are improved so as to expand the air resonance security boundary.
Design method capable of expanding air resonance security boundary of helicopter
2015-09-09
Patent
Electronic Resource
English
Emerald Group Publishing | 1959
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