Device for improving aeroelastic stability of bearing-free rotor and design method of device
A technology of aeroelastic stability and design method, applied in rotorcraft, transportation and packaging, motor vehicles, etc., can solve problems such as aeroelastic stability
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[0061] This example gives a bearingless rotor, the characteristic parameters of the rotor are as follows: number of blades N=4, rotor radius R=0.9144m, chord length c=0.0774m, rotor solidity σ=0.1079, rotor rated speed Ω= 817rpm, Lock number γ=5.673, pitch variable rod stiffness Kp=7.0×104N / m, distance between pitch variable rod and elastic shaft d=0.03111R, blade linear torsion rate θ TW =-11.3°, the hub pre-cone angle βp=0, the blade airfoil is VR-12, the blade pre-twist angle is 9°, and the blade sweep angle is -2°.
[0062] In this example, the radius of the circular shimmy pin, the length of the horizontal part and the length of the vertical part are used as design variables. In order to simplify the calculation process, the shimmy pin is set as a rigid body structure in this example, so the radius basically has no effect on it, while The length of the horizontal part of the shimmy pin is the smallest, that is, X=0. At this time, the shimmy pin is directly connected to th...
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