应用气动力修正技术的静气动 弹性发散计算

将气动力修正技术应用于静气动弹性发散计算与分析中.根据三维翼面定常气动压力分布数据,获取压力修正因子以及下洗修正因子,对基于平面偶极子格网法的定常气动力影响系数矩阵进行压力修正和下洗修正,并采用模态法对某翼面进行静气动弹性发散的计算.结果表明:由于三维翼面定常气动压力分布的气动力中心与偶极子格网法的气动力中心相比更靠近前缘,因此压力修正和下洗修正后的翼面发散速度较修正前均有所降低.

Static aeroelastic divergence analysis by introducing correction techniques of aerodynamic data

The correction techniques of aerodynamic forces were introduced in the computation and analysis of static aeroelastic divergence.According to steady pressure distribution data on a three dimensional wing,the correction factors to pressure and downwash were obtained and the steady aerodynamic influence matrix based on planar double lattice method was corrected.The divergence speed of the wing was calculated using the mode method.The results show the divergence speeds of the wing after pressure correction and downwash correction are both lower than that before,due to the aerodynamic center of steady pressure distribution on the three dimensional being closer to the leading edge than that of planar double lattice method.