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首页> 外文会议>AHS International Annual Forum vol.1; 20050601-03; Grapevine,TX(US) >Helicopter Rotor Lag Damping Augmentation Based on a Radial Absorber and Coriolis Coupling
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Helicopter Rotor Lag Damping Augmentation Based on a Radial Absorber and Coriolis Coupling

机译：基于径向吸收器和科里奥利耦合的直升机转子滞后阻尼增强

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摘要

A radial vibration absorber is proposed to augment rotor lag damping. Modeled as a discrete mass restrained by a damped spring and moving along the spanwise direction within the rotor blade, it introduces damping into the lag mode of the blade through strong Coriolis couplings. A two degree-of-freedom model is developed and used to examine the effectiveness of the radial absorber in transferring damping to the rotor lag mode. Results indicate that it is possible to introduce a significant amount of damping in the lag mode with a relatively small absorber mass. The corresponding amplitudes of 1/rev periodic motions are not excessively large. Additionally, a classical six degree-of-freedom aeromechanical stability analysis is augmented with two absorber cyclic degrees of freedom in the nonrotating frame to examine the effect of the radial absorber on aeromechanical stability characteristics. These results indicate that ground resonance instability is eliminated for the range of absorber parameters considered, and in most cases, the stability margins are significant.
机译：提出了一种径向减振器，以增加转子滞后阻尼。建模为受阻尼弹簧约束并在转子叶片内沿翼展方向移动的离散质量，它通过牢固的科里奥利联轴器将阻尼引入叶片的滞后模式。建立了一个两自由度模型，用于检验径向吸收器在将阻尼传递到转子滞后模式中的有效性。结果表明，可以在滞后模式下以相对较小的吸收器质量引入大量的阻尼。 1 / rev周期性运动的相应幅度不会过大。此外，经典的六自由度航空机械稳定性分析在非旋转框架中增加了两个吸收器循环自由度，以检查径向吸收器对航空机械稳定性特性的影响。这些结果表明，在所考虑的吸收器参数范围内，消除了地面共振的不稳定性，并且在大多数情况下，稳定性裕量非常大。

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