【摘要】 为研究直升机在前飞状态下的稳定性,建立了前飞状态下旋翼的结构模型、气动力模型和平衡方程组。对方程组的周期系数处理以及前飞时的相关参数对旋翼动稳定性的影响等进行了研究。在前飞动稳定性分析中引入动力入流自由度。从分析各个自由度间的相互作用入手揭示旋翼动不稳定性的物理本质及影响因素。更多还原

【Abstract】 It is more difficult to investigate the helicopter dynamic stability in forward flight than in hover.The rotor structure model,aerodynamic model and equations of motion were established.The treatment of equations with periodic coefficients and the influence of related parameters on rotor dynamic stability were investigated.The degree of freedom of the dynamic inflow was introduced into the dynamic stability analysis in forward flight.Starting with the analysis of mutual excitation of different degrees of freedom,the physical nature and influence factors on rotor dynamic instability are revealed.更多还原