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进行了带有调整系统的远铰解耦挂架抑制机翼/外挂颤振的低速风洞试验研究.试验是在大展弦比机翼颤振模型上进行的.试验结果表明:当外挂俯仰频率落在柔性区范围时,机翼/远铰解耦挂架/外挂的颤振速度比机翼/常规挂架/外挂的颤振速度有显著提高;且其颤振速度对外挂惯性特性的变化不敏感.试验结果还表明;调整系统可将外挂与机翼的相对静偏移修正到很小的设计角度内.文中还进行了单铰和远铰两种解耦挂架方案颤振抑制效果的比较,试验结果表明:远铰方案中外挂俯仰振动加速度响应比单铰时明显减小;且调整电机启动频率也比单铰时为低.文中还讨论了远铰挂架四连杆机构参数对外挂俯仰频率的影响.
A low speed wind tunnel test was conducted to suppress wing / plug flutter with a far-hinged decoupling pylon with an adjustment system.The experiment was carried out on a flutter model with large aspect ratio.The experimental results show that when the outer pitching The flutter speed of the wing / far-hinge decoupling pylon / plug-in is significantly higher than that of the wing / conventional pylon / plug-in when the frequency falls within the range of the flexible zone; and the flutter speed has a significant effect on the plug-in inertial characteristics The change is insensitive.Experimental results also show that the adjustment system can correct the relative static deviation between the plug and the wing to a small design angle.This paper also carried out two kinds of single-hinge and far-hinge decoupling rack program dither suppression The results show that: the response of plug-in pitch vibration acceleration is far less than that of single hinge in the far-hinged solution; and the adjustment frequency of the motor is lower than that of the single hinge.In the paper, the four- Effect of parameters on plug pitch frequency.