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本文通过对海豚型旋翼桨叶的气动弹性稳定性分析,研究了一类介于铰接式与无饺式之间旋翼桨叶的气动弹性稳定性。首先,从应变张量出发,运用Hamilton原理推导出旋翼浆叶全耦合运动偏微分-积分方程组;然后,运用摄动法对悬停状态的旋翼桨叶作了颤振分析,从而确定了该桨叶某些在生产、使用和改型中易变的参数,如:挥、摆、变距方向上的约束刚度和阻尼的变化,气动扭转的变化,飞行高度的变化等对气动弹性稳定性的影响关系。研究的结果对海豚型旋翼桨叶的国产化具有一定的实际意义,对进一步探求这类旋翼桨叶的气弹稳定性也具有一定的参考价值。
In this paper, the aerodynamic stability of a dolphin-type rotor blade is studied. The aeroelastic stability of a type of rotor blade between articulated and non-dumping is studied. First of all, from the strain tensor, the Hamiltonian principle is used to derive the partial differential equations of full coupling motion of blade rotor. Then, by using the perturbation method, the flutter of hover rotor blades is analyzed. Some of the parameters of the paddle, which are variable in production, use and modification, such as the change of the restraining stiffness and damping in the swinging, swinging and pitch changing, the change of aerodynamic torsion, the change of flight altitude, etc., The impact of the relationship. The results of this study have some practical significance for the domestication of dolphin-type rotor blades and have certain reference value for further exploration of the aeroelastic stability of such rotor blades.