基于试验气动力的纵向机动飞行载荷分析

提出了一种基于非线性风洞试验数据(简称试验气动力)同步进行纵向机动飞行过程和飞行载荷的计算分析方法.通过曲面样条插值将试验气动力的升力系数和俯仰力矩系数引入纵向机动飞行过程的计算,同时基于试验气动力的压力分布进行全机飞行载荷的静气动弹性修正.弹性载荷的计算采用线性气动力影响系数矩阵处理.采用偶极子格网法提供气动力(简称理论气动力).将基于这两种气动力的计算结果进行了对比.结果表明:基于试验气动力的机动飞行过程更为合理;基于理论气动力的载荷随机动飞行过程的变化趋势有可能与基于试验气动力的载荷变化趋势不一致. 

Flight loads analysis of longitudinal maneuver using experimental aerodynamic forces

A method synchronously computing longitudinal maneuvering flight and flight loads based on nonlinear wind-tunnel test aerodynamic forces(experimental aerodynamic forces for short)was proposed.The coefficients of lift and pitch moment of experimental aerodynamic forces were introduced into the longitudinal maneuvering flight computation by use of surface spline,and flight loads on overall aircraft were elastically corrected based on pressure distribution of experimental aerodynamic forces simultaneously.Elastic loads were obtained utilizing linear aerodynamic influence coefficient matrix.The aerodynamic forces were also presented using double-lattice method(theoretical aerodynamic forces for short).The computed results using experimental and theoretical aerodynamic forces were compared.The results show that the maneuvering flight based on experimental aerodynamic forces is more reasonable and the change of flight loads using theoretical aerodynamic forces may be incongruous with that using experimental aerodynamic forces during maneuvering flight.