中文摘要：

耦合求解NS方程和刚体动力学方程数值模拟80°后掠三角翼强迫俯仰、自由滚转双自由度耦合运动特性,研究了转动惯量、轴承机构阻尼、翼面流态以及俯仰运动频率、振幅、平均俯仰角等因素对三角翼俯仰、滚转双自由度耦合运动特性的影响。结果表明：机翼的转动惯量和轴承的机械阻尼显著影响自由滚转的频率和振幅;在转动惯量、轴承摩擦和湍流等多种因素的共同影响下,三角翼的双自由度运动可能会形成台阶形式的振荡曲线;俯仰运动的振幅、频率以及平均俯仰角对强迫俯仰、自由滚转双自由度耦合运动特性存在不同程度的影响。

英文摘要：

The numerical investigation of the characteristics of double Degree-of-Freedom（DOF） motion of an 80 delta wing in force-pitch and free-roll was presented,in which a coupling numerical method was employed for solving Navier-Stokes equations and rigid-body dynamic equations.The investigation includes： the compare of the characteristics between double DOF motion and single DOF motion,the amplitude and frequency characteristics of the free-roll motion in dynamic incidence and the influence of moment of inertia and bearing damp on the characteristics of double DOF motion.It showns that no limit-cycle-oscillation can be formed with dynamic incidence,the variation of the amplitude of free-roll lags behind the variation of incidence,the amplitude and frequency characteristics of free-to-roll angle in double DOF motion are obviously affected by the moment of inertia and bearing damp.