海豚型旋翼桨叶气动弹性稳定分析

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。

Analysis of Aeroelastic Stability of Dolphin Rotor Blades

The aeroelastic stability of one kind of rotor between the articulated and the hingeless rotors is studied by means of analysing the aeroelastic stability of Dolphin-Rotor blades. Starting from the strain tensor and applying Hamilton s principle, the integral, partial differential equations of motion for elastic flap bending, lead-lag bending and torsion of the blade are derived. Then, the flutter of the blade in hover is analysed by perturbation method. Therefore, the effects of some parameters, such as flapping, lagging and pitching constrained stiffness and damping at blade root, the aerodynamic pretwist, the distribution of induced veloctiy, the flight altitude, and so on,on the aeroelastic stability are investigated. The obtained results have a certain value for further research and theoretical study in this area, as well as some instructive significance for its production, use and modification in practical engineering.