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首页> 外文期刊>Chinese journal of aeronautics >Analyticla Model of Elastomeric Lag Damper Kinematic coupling and Its Effect on Helicopter Air Resonance in Hover
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Analyticla Model of Elastomeric Lag Damper Kinematic coupling and Its Effect on Helicopter Air Resonance in Hover

机译：悬臂弹性阻尼器运动学耦合分析模型及其对直升机空中共振的影响

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摘要

For an elastomeric lag damper with nonlinear properties and kinematic couplings, its dif- ferential equation about equilibrium position was derived in a rotating frame. The equation was then transformed into a non-rotating frame by multi-blade transformation and incorporated into the rotor/ airframe differential equations for eigen analysis. The effects of damper steady displacement and kine- matic couplings on the helicopter air resonance in hover were analyzed. The results demonstrate that the elastomeric damper can increase helicopter dynamic stability; however, its available damping will de- crease as its steady displacement increased. For the notional rotor system, the damper steady dis- placement will decrease when kinematic couplings are introduced, and hence the regressive lag modal damping an be increased.
机译：对于具有非线性特性和运动学耦合的弹性滞后阻尼器，在旋转框架中导出了其关于平衡位置的微分方程。然后，通过多叶片变换将该方程转换为非旋转框架，并将其合并到旋翼/机身微分方程中进行特征分析。分析了阻尼器稳态位移和运动学耦合对悬停时直升机空中共振的影响。结果表明，弹性阻尼器可以提高直升机的动力稳定性。但是，它的可用阻尼将随着其稳定排量的增加而减小。对于名义转子系统，引入运动学联轴器后，阻尼器的稳态排量将减小，因此，回归滞后模态阻尼将增加。

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